DD363Y Butt-Weld Top-Entry Cryogenic Butterfly Valve (Online Repairable) OverviewThe DD363Y butt-weld top-entry ultra-low temperature butterfly valve is a specialized valve designed for -196°C grade ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid helium, and liquid ethylene. It features butt-weld ends that are permanently connected to the pipeline, eliminating the risk of flange leakage. Its top-entry design allows for online maintenance by removing the bonnet and extracting internal core components such as the stem, disc, and seat from the top without cutting the valve out of the pipeline. The valve utilizes a triple-offset metal hard seal structure, with the disc sealing surface overlaid with hard alloy, ensuring tight shut-off and a long service life. This valve is widely used in critical systems requiring high reliability and convenient online maintenance, such as LNG terminals, air separation units, and cryogenic liquefaction plants.DD363Y Butt-Weld Top-Entry Cryogenic Butterfly Valve (Online Repairable) Product ImageDD363Y Butt-Weld Top-Entry Cryogenic Butterfly Valve (Online Repairable) Features1. Butt-Weld Connection for Permanent Seal: The butt-weld ends are welded directly to the pipeline, forming an integral connection. This completely eliminates potential leak points associated with flanged connections, meeting the absolute sealing requirements of ultra-low temperature service.2. Top-Entry Design for Online Maintenance: The unique top-entry structure allows for online inspection, cleaning, or repair. Internal trim components (stem, disc, seat) can be removed from the top without cutting the pipeline or removing the valve body from the line, significantly reducing maintenance downtime and costs.3. Cryogenic Treatment and Low-Temperature Materials: All critical components are made from LCB or LF2 low-temperature alloy steel, or forged F304/F316L stainless steel. Parts rated for ≤ -101°C undergo cryogenic treatment to ensure low-temperature toughness and dimensional stability at -196°C.4. Triple-Offset Hard Metal Seal: Utilizes a triple-offset sealing design for friction-free opening and closing. The sealing surfaces are overlaid with hard alloy, providing resistance to low temperatures, erosion, and wear, achieving bidirectional zero-leakage performance.5. Extended Bonnet for Anti-Freeze Protection: Features an extended bonnet designed according to the temperature rating, positioning the packing away from the low-temperature zone. This prevents packing freeze-up and stem seizure, ensuring flexible and reliable operation under cryogenic conditions.

DD663H Pneumatic Cryogenic Butterfly Valve (Online Repairable) OverviewThe DD663H pneumatic Cryogenic butterfly valve is a specialized valve designed for flow control and shut-off of -196°C grade Cryogenic media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid helium, and liquid ethylene. It features a butt-weld connection and is driven by a pneumatic actuator, enabling remote automatic control and flow regulation. The valve body and critical components are made of LCB low-temperature carbon steel, CF8 stainless steel, or forged F304/F316L stainless steel, all subjected to cryogenic treatment to eliminate residual stress and ensure low-temperature toughness and dimensional stability at -196°C. The valve incorporates an extended bonnet design, keeping the packing away from the low-temperature zone to prevent packing freeze-up and stem seizure. This valve is widely used in automated Cryogenic systems such as LNG terminals, air separation units, and cryogenic liquefaction plants.DD663H Pneumatic Cryogenic Butterfly Valve (Online Repairable) Product ImageDD663H Pneumatic Cryogenic Butterfly Valve (Online Repairable) Features1. Pneumatic Actuation for Remote Control: Equipped with a pneumatic actuator that accepts control signals for automatic opening/closing and flow regulation, facilitating integration into automated systems. The pneumatic device typically consists of an air supply, air control valve, and actuator mechanism, enabling remote operation.2. Butt-Weld Connection for Permanent Seal: The butt-weld ends are welded directly to the pipeline, forming an integral connection. This completely eliminates potential leak points associated with flanged connections, meeting the absolute sealing requirements of Cryogenic service.3. Cryogenic Treatment and Low-Temperature Materials: All critical components are made from low-temperature resistant stainless steel or low-temperature alloy steel. They undergo cryogenic treatment to relieve stress. The low-temperature impact toughness of materials is strictly controlled to ensure dimensional stability at -196°C and prevent brittle fracture.4. Reliable Bidirectional Sealing Structure: Utilizes a bidirectional sealing design where both the seat and the disc provide sealing capability. The seat is typically made of hard alloy material to ensure reliable sealing between the seat and disc.5. Extended Bonnet Anti-Freeze Design: Features a long-neck bonnet structure that effectively lengthens the cold conduction path. This keeps the packing area at a higher temperature, preventing packing freeze-up and stem seizure, ensuring flexible and reliable operation under cryogenic conditions.6. Simple Structure and Easy Maintenance: The pneumatic cryogenic butterfly valve has a relatively simple structure, consisting of components such as the body, disc, stem, and seals. This simplicity facilitates convenient maintenance and repair.

DD343F Soft Seal Low Temperature Flange Butterfly Valve OverviewThe DD343F flanged low-temperature butterfly valve is a cryogenic-service-specific valve featuring a flanged connection and a triple eccentric sealing structure. It is suitable for ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene. The valve body and key components are manufactured from LCB low-temperature carbon steel, CF8 stainless steel, or F304/F316L forged stainless steel, all of which undergo deep cryogenic treatment to eliminate residual stress, ensuring low-temperature toughness and dimensional stability at -196°C. The valve features an extended bonnet design that keeps the stuffing box away from the low-temperature zone, preventing packing freeze-up and valve stem seizure. The disc rotates 90 degrees to achieve both on-off control and flow regulation. Widely used in LNG receiving terminals, air separation units, low-temperature storage and transportation, and petrochemical low-temperature facilities, it is critical equipment for reliable shut-off and regulation under ultra-low temperature conditions.DD343F Soft Seal Low Temperature Flange Butterfly Valve Product Image Product ImageDD343F Soft Seal Low Temperature Flange Butterfly Valve Features 1. Anti-Freezing Extended Bonnet Design: The extended bonnet structure effectively lengthens the cold conduction path, keeping the stuffing box in a relatively higher temperature zone. This prevents packing freeze-up and valve stem seizure, ensuring flexible and reliable operation.2. Deep Cryogenic Treatment and Low-Temperature Materials: All critical components undergo deep cryogenic treatment to relieve stress. The chemical composition and low-temperature impact toughness of the materials are strictly controlled to ensure low-temperature toughness and dimensional stability at -196°C, preventing brittle fracture, deformation, and leakage at cryogenic temperatures.3. Reliable Sealing with Triple Eccentric Structure: The triple eccentric sealing structure ensures almost no wear between the seat and the disc, providing a "tighter-as-pressure-increases" sealing function. The sealing ring is made of stainless steel or PTFE, combining the advantages of both metal hard sealing and elastic sealing.4. Convenient Installation with Flanged Connection: The standard flanged connection facilitates easy installation and disassembly, allowing efficient connection with various low-temperature equipment and pipelines. It is suitable for a wide range of sizes from DN50 to DN1000.5. Excellent Flow Regulation Performance: The flow characteristic tends to be proportional, offering good regulation performance. Flow can be adjusted arbitrarily within the 0 to 90-degree rotation range, allowing the valve to function as both a shut-off valve and a control valve.

DD343H Hard Seal Low Temperature Butterfly Valve OverviewThe DD343H flanged cryogenic butterfly valve is a specialized low-temperature valve featuring a flange connection and a triple-offset metal hard seal structure. It is suitable for ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene. The valve body and key components are made of LCB low-temperature carbon steel, CF8 stainless steel, or forged F304/F316L stainless steel. Parts designed for temperatures ≤ -101°C undergo cryogenic treatment to prevent deformation under ultra-low temperature conditions. The valve features an extended bonnet design, with the stem and bonnet extension length determined based on the temperature rating, keeping the packing away from the low-temperature zone to prevent packing freeze-up and stem seizure. The valve is operated by a worm gear drive that rotates the disc 90 degrees for opening, closing, and flow control. It is widely used in cryogenic industries such as LNG and air separation.DD343H Hard Seal Low Temperature Butterfly Valve Product ImageDD343H Hard Seal Low Temperature Butterfly Valve Features1. Extended Bonnet Anti-Freeze Design: The bonnet extension length is determined based on the temperature rating, effectively isolating cold conduction. This keeps the packing area at a higher temperature, preventing packing freeze-up and stem seizure, ensuring flexible and reliable operation.2. Cryogenic Treatment and Low-Temperature Materials: Critical components designed for ≤ -101°C undergo cryogenic treatment to relieve stress. The low-temperature impact toughness of materials is strictly controlled to ensure dimensional stability at -196°C and prevent brittle fracture.3. Triple-Offset Hard Seal Structure: Utilizes a triple-offset sealing design that minimizes wear between the seat and disc, providing a sealing effect that tightens as pressure increases. The disc sealing surface is overlaid with hard alloy, enhancing erosion resistance and extending service life.4. Bidirectional Sealing and Zero Leakage: Excellent sealing performance achieves zero leakage. The seat sealing surface is overlaid with hard alloy, providing superior sealing characteristics.5. Excellent Control Performance: Possesses good throttling capabilities and can function as a control valve, allowing flow adjustment anywhere within the 0 to 90-degree rotation range.6. Safety Protection Design: Features a blowout-proof stem design for operational safety. A drip plate design effectively prevents condensate from flowing into the insulation layer. Stem packing utilizes low-emission materials to ensure compliance with low-leakage requirements.

DQ367H Top-Entry Cryogenic High-Pressure Ball Valve Overview The DQ367H Top-Entry Cryogenic High-Pressure Ball Valve is a high-performance ball valve designed with a top-entry structure, specifically developed for cryogenic and high-pressure operating conditions. It is suitable for media at -196°C, such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid helium, and liquid ethylene.The valve features a one-piece body construction with a top bonnet connection. This design allows for online maintenance, enabling the removal of internal core components such as the stem, ball, and seats from the top without dismantling the valve from the pipeline. The pressure-containing parts are manufactured from high-strength cryogenic alloy steel or forged stainless steel. Prior to final machining, all components undergo a deep cryogenic treatment process: parts are immersed in a liquid nitrogen chamber, cooled to -192°C, held at that temperature, and then removed. This cycle is repeated twice to relieve residual stresses, ensuring material stability and performance under cryogenic temperatures.This valve is widely used in critical systems requiring high reliability and ease of online maintenance, including LNG terminals, air separation units, and cryogenic high-pressure pipelines.DQ367H Top-Entry Cryogenic High-Pressure Ball Valve Product ImageDQ367H Top-Entry Cryogenic High-Pressure Ball Valve Features 1. Top-Entry Online Maintenance Structure: The unique top-entry design allows for the removal of the bonnet and the lifting out of core components such as the ball, stem, and seats for inspection, cleaning, or replacement without cutting the valve out of the pipeline. This significantly reduces maintenance downtime.2. Cryogenic Treatment and High-Pressure Cryogenic Materials: The pressure-containing parts are manufactured from materials capable of withstanding expansion and contraction caused by temperature changes. Prior to final machining, all components undergo a deep cryogenic treatment process: parts are immersed in a liquid nitrogen chamber, cooled to -192°C, held at that temperature for 1-2 hours, and then allowed to return naturally to room temperature. This cycle is repeated twice to ensure dimensional stability and mechanical performance at -196°C.3. Extended Bonnet Anti-Freezing Design: The long-neck bonnet structure is designed to protect the function of the stuffing box. It positions the stuffing box far away from the low-temperature zone, ensuring the sealing effectiveness of the packing. Additionally, it allows for the wrapping of insulating materials to prevent the loss of cold energy.4. Abnormal Pressure Rise Prevention Safety Structure: The valve is equipped with a structure to prevent abnormal pressure rise. Since the medium inside a cryogenic valve expands dramatically in volume upon vaporization, the pressure can increase abnormally. When pressure builds up in the valve cavity, this design connects the cavity with the inlet port or incorporates a pressure relief valve at the valve inlet, ensuring safe operation.5. Hardened Stem Surface Treatment: For service temperatures below -100°C, the stem material undergoes chromium plating or nitriding treatment. This increases the surface hardness of the stem and enhances the reliability of the packing seal.6. Adjustable Seal and Lubrication Injection Maintenance: The valve seat features an adjustable seal design. When the sealing effectiveness of the packing decreases, lubricating grease can be injected through the packing chamber to form an oil seal layer. This reduces the pressure differential across the packing and improves sealing performance.

DQ41F Forged Stainless Steel Cryogenic Ball Valve OverviewThe DQ41F Forged Stainless Steel Cryogenic Ball Valve is a high-performance ball valve specifically designed for cryogenic services. It features a forged stainless steel body and a flanged connection. This valve is suitable for ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene.The valve body and key components are manufactured from forged stainless steel materials such as F304 and F316L. These components undergo a rigorous deep cryogenic treatment process, where rough-machined parts are immersed in a cooling medium for several hours (typically 12 hours) to relieve internal stresses. This ensures excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The valve incorporates an extended bonnet design, which positions the stuffing box away from the cold zone. This prevents the packing from freezing and mitigates valve stem seizure, ensuring flexible and reliable operation. The sealing surfaces between the ball and the valve seat utilize PTFE or other specialized soft sealing materials suitable for cryogenic applications. The valve operates by rotating the ball 90 degrees to open or close.This valve is widely used in LNG terminals, air separation units, cryogenic storage and transportation systems, and low-temperature installations in the petrochemical industry. It is a critical piece of equipment for achieving reliable shut-off under ultra-low temperature working conditions.Forged Stainless Steel Cryogenic Ball Valve DQ41F Product ImageDQ41F Forged Stainless Steel Cryogenic Ball Valve Features 1. High-Pressure Capability of Forged Stainless Steel: Constructed from forged stainless steel materials (F304/F316L), the valve features a uniform and dense structure with high mechanical strength. It can withstand higher working pressures (PN1.6-16.0MPa), making it suitable for high-pressure cryogenic applications.2. Deep Cryogenic Treatment Process: All key components undergo deep cryogenic treatment to relieve machining stresses. This ensures material toughness and dimensional stability at -196°C, preventing brittle fracture and leakage due to deformation under low temperatures.3. Extended Bonnet Anti-Freezing Design: The long-neck bonnet structure effectively lengthens the path for cold conduction, keeping the stuffing box in a higher temperature zone. This prevents the packing from freezing and the valve stem from seizing, ensuring flexible and reliable operation.4. Specialized Cryogenic Sealing System: The valve seat utilizes PTFE or other specialized soft sealing materials for low-temperature service. These materials exhibit low shrinkage rates at cryogenic temperatures, providing excellent sealing performance and ensuring bidirectional zero leakage.5. Lightweight Structure with Minimal Heat Loss: To reduce heat loss from the valve body and ensure performance under ultra-low temperatures, the body is intentionally designed with a lightweight and compact structure. This effectively minimizes the loss of cold energy.

DQ347H Three-Piece Cryogenic Ball Valve Overview The DQ347H Three-Piece Cryogenic Ball Valve is a high-performance ball valve specifically engineered for cryogenic services. It features a three-piece body construction and is operated by a worm gear drive. This valve is suitable for ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene.The valve utilizes a three-piece bolted body construction, consisting of two end pieces and a central body section. This design facilitates easy online maintenance and replacement of sealing components without removing the entire valve from the pipeline. The valve body and key components are manufactured from materials such as LCB low-temperature carbon steel, CF8 stainless steel, or forged stainless steel (F304/F316L). These components undergo deep cryogenic treatment to eliminate residual stresses, ensuring excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The valve incorporates an extended bonnet design, which positions the stuffing box away from the cold zone. This prevents the packing from freezing and mitigates valve stem seizure, ensuring reliable operation.This valve is widely used in LNG terminals, air separation units, cryogenic storage and transportation systems, and low-temperature installations in the petrochemical industry. It is a critical piece of equipment for achieving reliable shut-off under ultra-low temperature working conditions.DQ347H Three-Piece Cryogenic Ball Valve Product ImageDQ347H Three-Piece Cryogenic Ball Valve Features1. Convenient Maintenance with Three-Piece Design: The valve body utilizes a three-piece bolted construction. This allows for internal inspection, cleaning, or replacement of seals on the central section without completely removing the valve from the pipeline, significantly reducing maintenance downtime.2. Cryogenic Treatment and Low-Temperature Materials: Key components are manufactured from low-temperature resistant stainless steel or low-temperature alloy steel. They undergo deep cryogenic treatment to relieve stress and strictly control low-temperature impact toughness, ensuring dimensional stability at -196°C and preventing brittle fracture and leakage due to deformation.3. Extended Bonnet Anti-Freezing Design: The long-neck bonnet structure effectively lengthens the path for cold conduction, keeping the stuffing box in a higher temperature zone. This prevents the packing from freezing and the valve stem from seizing, ensuring flexible and reliable operation at cryogenic temperatures.4. Smooth Operation with Worm Gear Drive: Equipped with a worm gear actuator, the valve provides high output torque, requiring less effort for operation. It ensures smooth and reliable opening and closing, allowing for precise control under cryogenic conditions. During manual operation, do not apply additional force after the position indicator shows fully open or closed.5. Automatic Pressure Relief Safety Structure: The valve seat features an automatic pressure relief design. If the pressure of the medium inside the valve cavity exceeds the spring preload force, the downstream seat retracts away from the ball. This safely relieves the abnormally high pressure caused by medium vaporization, preventing over-pressurization.

DQ961F Electric Cryogenic Ball Valve OverviewThe DQ961F Electric Cryogenic Ball Valve is a specialized ball valve designed for ultra-low temperature media down to -196°C, such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene. It features an electric actuator for operation and is configured with butt-weld ends for connection.The valve body and key components are manufactured from 304 stainless steel or low-temperature alloy steel forgings. These components undergo deep cryogenic treatment to eliminate residual stresses: rough-machined parts are immersed in liquid nitrogen, cooled to -196°C, held at that temperature for a specified period, and then removed. This cycle is repeated to ensure dimensional stability and mechanical performance of the materials under ultra-low temperatures.The valve incorporates an extended bonnet design, which positions the stuffing box away from the cold zone, preventing the packing from freezing and mitigating valve stem seizure. The ball features pressure relief holes that connect the valve cavity with the pipeline inlet, preventing abnormal pressure buildup caused by medium vaporization.This valve is widely used in LNG terminals, air separation units, cryogenic storage and transportation systems, and low-temperature installations in the petrochemical industry. It is a critical piece of equipment for achieving automated shut-off control under ultra-low temperature working conditions.DQ961F Electric Cryogenic Ball Valve Product ImageDQ961F Electric Cryogenic Ball Valve Features1. Electric Actuation for Remote Control: Equipped with an electric actuator, the valve supports both on-off and modulating control. It can receive standard control signals such as 4-20mA, enabling remote automatic operation. The actuator features built-in thermal overload protection and includes a manual override mechanism for emergency operation during power outages.2. Cryogenic Treatment and Low-Temperature Materials: Components undergo deep cryogenic treatment prior to final machining. Parts are immersed in a liquid nitrogen chamber, cooled to -196°C, held at that temperature for 1-2 hours, and then allowed to return naturally to room temperature. This cycle is repeated twice to relieve residual stresses, ensuring dimensional stability and mechanical performance at -196°C.3. Extended Bonnet Anti-Freezing Design: The bonnet features a long-neck structure, positioning the stuffing box away from the low-temperature zone to ensure effective packing sealing. It also allows for the wrapping of insulating materials to prevent cold energy loss. The neck length is selected based on the operating temperature and the thickness of the insulation material.4. Abnormal Pressure Rise Prevention Structure: Cryogenic media expand dramatically in volume upon vaporization, causing abnormal pressure increases. The valve incorporates pressure relief holes in the ball that connect the valve cavity with the pipeline inlet port. When pressure builds up in the cavity, the medium is relieved to the inlet pipeline, ensuring safe valve operation.5. Hardened Stem Surface Treatment: For service temperatures below -100°C, the stem material undergoes chromium plating or nitriding treatment. This increases the surface hardness of the stem and enhances the reliability of the packing seal.

DZ41W Cryogenic Gate Valve Overview The DZ41W Cryogenic Gate Valve is a high-performance gate valve specifically designed for ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen, liquid ammonia, and liquid ethylene. It features a flanged connection.The valve body and key components are manufactured from low-temperature resistant stainless steel (such as CF8, F304) or low-temperature alloy steel (such as LCB, LC3). These components undergo deep cryogenic treatment to eliminate residual stresses, ensuring excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The gate valve operates by lifting and lowering the gate to open or close, making it suitable for fully open or fully closed shut-off applications. The bonnet length is determined based on the operating temperature, utilizing an extended bonnet design. This positions the stuffing box away from the cold zone, preventing the packing from freezing and mitigating valve stem seizure.This valve is widely used in LNG terminals, air separation units, petrochemical low-temperature installations, and energy systems.DZ41W Cryogenic Gate Valve Product ImageDZ41W Cryogenic Gate Valve Features 1. Extended Bonnet Anti-Freezing Design: The bonnet length is determined based on the valve's operating temperature, effectively lengthening the path for cold conduction. This ensures the stuffing box remains in a higher temperature zone, preventing the packing from freezing and the valve stem from seizing, guaranteeing flexible and reliable operation.2. Cryogenic Treatment and Low-Temperature Materials: Key components are manufactured from low-temperature resistant stainless steel or low-temperature alloy steel. The chemical composition and mechanical properties such as low-temperature impact toughness are strictly controlled. Components undergo deep cryogenic treatment to relieve stress, ensuring material stability at -196°C.3. Cavity Pressure Relief Safety Structure: To prevent abnormal pressure rise in the valve cavity, a pressure relief hole is provided on the inlet side of the gate. This effectively avoids the risk of body damage caused by medium vaporization and expansion, enhancing valve safety.4. Low Fluid Resistance and Wide Applicability: The medium flow direction is unrestricted, with no flow disturbance or pressure drop, resulting in low fluid resistance and minimal erosion of the sealing surfaces. It is suitable for a wide range of cryogenic media, including methane, ethane, propane, liquid ammonia, liquid oxygen, liquid nitrogen, and liquefied natural gas.5. Multiple Sealing Surface and Flange Standards: Materials for components such as packing and gaskets (e.g., flexible graphite, PTFE, cryogenic asbestos) are selected based on the operating temperature. Various piping flange standards and sealing face types are available to meet diverse engineering requirements.

DZ11W Cryogenic Socket Weld Gate Valve Overview The DZ11W Cryogenic Socket Weld Gate Valve is a small-diameter gate valve specifically designed for cryogenic services, featuring a socket weld connection and a forged steel body. It is suitable for ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen, liquid ammonia, and liquid ethylene.The valve body and key components are manufactured from forged stainless steel (such as F304, F316L) or low-temperature alloy steel (such as A350 LF2). These components undergo deep cryogenic treatment to eliminate residual stresses, ensuring excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The valve operates by lifting and lowering the gate to open or close. The length of the extended bonnet is determined based on the operating temperature, positioning the stuffing box away from the cold zone. This design prevents the packing from freezing and mitigates valve stem seizure.This valve is widely used in LNG terminals, air separation units, cryogenic storage and transportation systems, and small-diameter piping systems in the petrochemical industry. It is a critical piece of equipment for achieving reliable shut-off under ultra-low temperature working conditions.DZ11W Cryogenic Socket Weld Gate Valve Product ImageDZ11W Cryogenic Socket Weld Gate Valve Features1. Permanent Sealing with Socket Weld Connection: The socket weld connection integrates the valve with the pipeline, completely eliminating the risk of leakage at the connection point. It is ideal for small-diameter, high-pressure cryogenic systems.2. High-Pressure Capability of Forged Steel Body: Constructed from forged stainless steel or low-temperature alloy steel, the valve features a uniform and dense structure with high mechanical strength. Pressure ratings are available up to 150LB-800LB or PN1.6-16.0MPa.3. Cryogenic Treatment and Low-Temperature Materials: The chemical composition and low-temperature impact toughness of materials are strictly controlled. Components undergo deep cryogenic treatment to relieve stress, ensuring toughness and dimensional stability at -196°C, preventing brittle fracture.4. Extended Bonnet Anti-Freezing Design: The bonnet length is determined based on the valve's operating temperature, effectively lengthening the path for cold conduction. This ensures the stuffing box remains in a higher temperature zone, preventing the packing from freezing and the valve stem from seizing.5. Low Fluid Resistance and Wide Applicability: The medium flow direction is unrestricted, resulting in low fluid resistance and minimal erosion of the sealing surfaces. It is suitable for a wide range of cryogenic media, including methane, ethane, propane, liquid ammonia, liquid oxygen, liquid nitrogen, and liquefied natural gas.

DZ41W Forged Stainless Steel Cryogenic Gate Valve Overview The DZ41W Forged Stainless Steel Cryogenic Gate Valve is a high-performance gate valve specifically designed for cryogenic services, featuring a forged stainless steel body and a flanged connection. It is suitable for ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen, liquid ammonia, and liquid ethylene.The valve body and key components are manufactured from forged stainless steel materials such as F304 and F316L. These components undergo rigorous deep cryogenic treatment to eliminate residual stresses, ensuring excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The gate valve operates by lifting and lowering the gate to open or close. The length of the extended bonnet is determined based on the operating temperature, positioning the stuffing box away from the cold zone. This design prevents the packing from freezing and mitigates valve stem seizure.This valve is widely used in LNG terminals, air separation units, petrochemical low-temperature installations, and energy systems. It is a critical piece of equipment for achieving reliable shut-off under ultra-low temperature working conditions.DZ41W Forged Stainless Steel Cryogenic Gate Valve Product ImageDZ41W Forged Stainless Steel Cryogenic Gate Valve Features1. High-Pressure Capability of Forged Stainless Steel: Constructed from forged stainless steel materials (F304/F316L), the valve features a uniform and dense structure with high mechanical strength. It can withstand higher working pressures (PN1.6-16.0MPa), making it suitable for high-pressure cryogenic applications.2. Deep Cryogenic Treatment Process: The chemical composition and mechanical properties such as low-temperature impact toughness are strictly controlled. Components undergo deep cryogenic treatment to relieve stress, ensuring low-temperature toughness and dimensional stability at -196°C, preventing brittle fracture and leakage due to deformation.3. Extended Bonnet Anti-Freezing Design: The bonnet length is determined based on the valve's operating temperature, effectively lengthening the path for cold conduction. This ensures the stuffing box remains in a higher temperature zone, preventing the packing from freezing and the valve stem from seizing, guaranteeing flexible and reliable operation.4. Cavity Pressure Relief Safety Structure: To prevent abnormal pressure rise in the valve cavity, a pressure relief hole is provided on the inlet side of the gate. This effectively avoids the risk of body damage caused by medium vaporization and expansion, enhancing valve safety.5. Low Fluid Resistance and Wide Applicability: The medium flow direction is unrestricted, with no flow disturbance or pressure drop, resulting in low fluid resistance. The sealing surfaces are overlaid with hardfacing alloy (STL), providing resistance to wear and erosion. It is suitable for a wide range of cryogenic media, including methane, ethane, propane, liquid ammonia, liquid oxygen, liquid nitrogen, and liquefied natural gas.

DZ61W American Standard Cryogenic Welded Gate Valve Overview The DZ61W American Standard Cryogenic Welded Gate Valve is a high-performance gate valve specifically designed for cryogenic services, featuring a forged steel body and welded end connections. It is strictly manufactured in accordance with American API standards and is suitable for ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen, liquid ammonia, and liquid ethylene.The valve body and key components are manufactured from A350 LF2/LF3 low-temperature alloy steel or F304/F316L forged stainless steel. These components undergo deep cryogenic treatment to eliminate residual stresses, ensuring excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The valve incorporates an extended bonnet design, with the bonnet length determined based on the operating temperature. This positions the stuffing box away from the cold zone, preventing the packing from freezing and mitigating valve stem seizure.This valve is widely used in LNG terminals, air separation units, petrochemical low-temperature installations, and energy systems. It is a critical piece of equipment for achieving reliable shut-off under ultra-low temperature working conditions.DZ61W American Standard Cryogenic Welded Gate Valve Product ImageDZ61W American Standard Cryogenic Welded Gate Valve Features 1. Strict Compliance with API Standards: Design and manufacturing conform to specifications such as ANSI B16.34, API 600, and API 602. Inspection and testing comply with API 598 standards, ensuring valve reliability and interchangeability under cryogenic operating conditions.2. Permanent Sealing with Welded Connection: Featuring socket weld or butt weld connections that integrate the valve with the pipeline, this design completely eliminates the risk of leakage at connection points. It is ideal for cryogenic systems where leakage is not permitted.3. Cryogenic Treatment and Low-Temperature Materials: The chemical composition and low-temperature impact toughness of materials are strictly controlled. Components undergo deep cryogenic treatment to relieve stress, ensuring toughness and dimensional stability at -196°C, preventing brittle fracture and leakage due to deformation.4. Extended Bonnet Anti-Freezing Design: The bonnet length is determined based on the valve's operating temperature, effectively lengthening the path for cold conduction. This ensures the stuffing box remains in a higher temperature zone, preventing the packing from freezing and the valve stem from seizing.5. Cavity Pressure Relief Safety Structure: To prevent abnormal pressure rise in the valve cavity, a pressure relief hole is provided on the inlet side of the gate. This effectively avoids the risk of body damage caused by medium vaporization and expansion, enhancing valve safety.6. Low Fluid Resistance and Wide Applicability: The medium flow direction is unrestricted, with no flow disturbance or pressure drop, resulting in low fluid resistance and minimal erosion of the sealing surfaces. It is suitable for a wide range of cryogenic media, including methane, ethane, propane, liquid ammonia, liquid oxygen, liquid nitrogen, and liquefied natural gas.

OverviewThe DJ11F low-temperature internal thread globe valve is a special valve designed specifically for ultra-low temperature conditions. It drives the valve disc vertically up and down along the centerline of the valve seat through the valve stem, achieving reliable opening and closing and flow regulation of the pipeline. The core of its design lies in the use of low-temperature materials and deep cryogenic treatment throughout the valve, ensuring that key components such as the valve body, valve cover, and valve disc maintain good mechanical performance in deep cryogenic environments and prevent low-temperature embrittlement. The sealing surface of the valve seat usually adopts rigid sealing or soft sealing structures with excellent low-temperature performance such as polytetrafluoroethylene. Combined with an elongated valve cover design, a "cold box" is formed at the neck of the valve cover away from low-temperature fluids, effectively preventing packing freezing, valve stem jamming, and reducing external heat transfer. The valve adopts internal thread connection and is directly screwed and fixed to the pipeline system through threads, with a compact structure. Valves rely on manual devices (such as handwheels) to drive the valve stem, converting rotational force into linear motion of the valve disc, achieving smooth and reliable opening and closing control. This valve is designed specifically for low-temperature transportation and storage systems in industries such as liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, and liquid carbon dioxide. It is particularly suitable for various low-temperature medium operating conditions that require strict sealing and reliable operation within the range of -40 ℃ to -196 ℃.DJ11F Cryogenic Internal Thread Globe Valve Product Drawingfeature1. Excellent cryogenic sealing performance: The valve disc and seat sealing pair are made of metal materials that have undergone cryogenic treatment or non-metallic materials with excellent low-temperature characteristics (such as reinforced polytetrafluoroethylene), which can maintain extremely high sealing pressure and elasticity under ultra-low temperature conditions from -40 ℃ to -196 ℃, ensuring long-term tight shut-off of the valve and effectively preventing leakage of extremely low-temperature media.2. Reliable anti freezing and anti jamming design: adopting an elongated valve cover (neck length) structure, significantly increasing the valve stem stroke, keeping the packing box and operating mechanism away from the low-temperature flow channel, forming a reliable "thermal isolation zone". This can effectively prevent the packing from freezing due to low temperature, ensure flexible operation of the valve stem, and avoid opening and closing jamming caused by ice blockage or cold shrinkage.3. Optimized low-temperature materials and structures: Key pressure bearing components such as valve bodies, valve covers, and valve discs are made of high-quality materials resistant to low-temperature impact, such as austenitic stainless steel, and undergo strict cryogenic treatment to stabilize the metal structure, ensuring excellent toughness and mechanical strength even at extreme low temperatures, and eliminating the risk of low-temperature brittleness.4. Compact, lightweight, and easy to install: Adopting internal thread (G or Rp thread) connection method, the structure is compact, the volume is small, and the weight is light. It can be directly screwed with pipeline threads without the need for matching flanges, making installation simple and fast. It is particularly suitable for low-temperature devices and equipment interfaces with limited space or dense pipe layout.5. Smooth operation and simple maintenance: driven by the handwheel, the transmission is smooth and the opening and closing torque is moderate. The valve structure is classic, with few internal components and a low failure rate. Once maintenance is required, the packing or valve seat seal can be replaced online, with low maintenance costs and ease.6. Wide adaptability to low-temperature media: Designed specifically for various low-temperature and ultra-low temperature media such as liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, liquefied ethylene, and liquid carbon dioxide, it is widely used in pipeline systems for LNG refueling, air separation, cold energy utilization, low-temperature storage and transportation, and scientific research experiments. It is a key equipment for achieving reliable cut-off of low-temperature media.

OverviewDJ41W low-temperature forged steel stainless steel flange globe valve is a special valve designed for low-temperature environments. It drives the valve disc to move vertically along the center line of the valve seat through the valve stem, achieving reliable opening and closing and flow regulation of the pipeline. The core of its design lies in the use of forged stainless steel materials (such as 304, 316 austenitic stainless steel) for the valve body, ensuring excellent impact toughness and structural stability even under low temperature conditions. The overall design of the valve focuses on low-temperature sealing performance, using an extended valve cover structure to isolate the valve stem transmission components from low-temperature media, avoid external frosting, and protect the normal function of the packing box. The valve is connected by flanges and firmly fixed to the pipeline flange with bolts. The sealing surface is usually welded or made of hard alloy as a whole to improve wear resistance and sealing durability. Valves can be driven by manual devices or matching electric/pneumatic devices to convert input force into linear motion of the valve disc, achieving smooth and reliable opening, closing, and regulating control. This valve is designed specifically for low-temperature medium transportation systems such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, ethylene, etc. It is particularly suitable for harsh working conditions in the petrochemical, air separation, refrigeration, and energy industries that require long-term stable operation within a temperature range of -46 ℃ to -196 ℃ or even lower.Product drawing of DJ41W low-temperature forged steel stainless steel flange globe valvefeature1. Excellent low-temperature toughness design: The valve body is made of forged stainless steel material (such as 304, 316 austenitic stainless steel), which has a fine grain structure and uniform mechanical properties. It maintains good impact toughness at low temperatures, effectively preventing low-temperature brittle fracture and ensuring the structural safety of the valve in deep cold environments.2. Reliable low-temperature sealing system: adopting an extended valve cover structure to isolate the low-temperature medium from the packing box area, avoiding valve stem frosting and blockage; The sealing surface of the valve disc and valve seat is usually welded with Stellite alloy or paired with hard materials. After precision grinding, it can still maintain a tight seal under low-temperature shrinkage conditions to prevent medium leakage.3. Professional anti external cooling structure: The valve cover neck is lengthened to keep the packing box and operating mechanism away from the low-temperature flow channel, reduce cold conduction, prevent external frosting from affecting operation, and protect the stable performance of the sealing packing, extending its service life.4. Adapt to cryogenic media and harsh working conditions: specially designed for low-temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, ethylene, etc., with a wide temperature range (-46 ℃ to -196 ℃ or even lower), materials and structures meet low-temperature service requirements, and are suitable for key processes such as air separation, liquefaction storage and transportation, and low-temperature chemical engineering.5. Smooth operation and flexible driving: The valve stem adopts a lifting design, which ensures smooth transmission and small opening and closing torque; Supports manual, electric or pneumatic drive modes, facilitating remote control and automated operation, meeting the precise cutting and adjustment needs under different working conditions.6. Compact structure and easy maintenance: using flange connection, easy installation and centering, reliable sealing; The forged steel valve body has a compact structure, high strength, optimized internal flow channel design, and low pressure loss; The key components can be disassembled for maintenance, making it easy to inspect and replace in low-temperature systems, reducing operation and maintenance costs.

OverviewThe DJ41W low temperature globe valve is a type of globe valve specifically designed for low-temperature operating conditions. By rotating the handwheel, it drives the stem and disc to perform a vertical lifting motion along the centerline of the seat, achieving reliable opening and closing of the medium in the pipeline. Its core design feature is the adoption of an extended bonnet structure, which positions the stuffing box away from the low-temperature medium area, ensuring the packing operates at near-ambient temperature. This guarantees the valve maintains good sealing performance and operational reliability under low-temperature conditions. The valve's closure member is a plug-type disc, with sealing surfaces designed as flat or tapered surfaces. The disc moves linearly along the centerline of the fluid. The valve uses a flange connection, secured by bolts to the pipeline flange, offering a compact structure and convenient installation and maintenance. The stem movement type is typically the rising stem type (stem rises, handwheel does not rise), utilizing threaded transmission to convert rotational force into linear motion of the stem and disc, achieving stable and sensitive opening and closing control. This valve is suitable for management systems in low-temperature liquid storage and transportation equipment. It features flexible operation and reliable sealing, making it widely used in pipeline systems for low-temperature media such as liquefied natural gas, ethylene, liquid oxygen, and liquid nitrogen. It is particularly suitable for low-temperature applications requiring reliable shut-off or fluid passage.DJ41W Low Temperature Globe Valve Product ImageFeatures1、Extended Bonnet Design, Reliable Low-Temperature Sealing: The extended bonnet structure effectively isolates the low-temperature medium from the stuffing box, ensuring the packing operates at near-ambient temperature. This prevents the packing from freezing and failing, guaranteeing the valve's sealing performance and operational reliability under low-temperature conditions.2、Excellent Low-Temperature Sealing Performance: The sealing pair of the disc and seat utilizes a tapered or flat sealing structure. Through precision grinding and pairing, combined with low-temperature elastic gaskets or self-energizing sealing design, it maintains good specific sealing pressure under low-temperature conditions, achieving tight shut-off and effectively preventing internal leakage of the medium.3、Low Fluid Resistance, Optimized Flow Path: The valve body features a streamlined channel design, providing a smooth transition for the medium flow. This significantly reduces flow resistance and pressure loss, making it suitable for low-temperature systems sensitive to pressure drops.4、Easy Operation, Intuitive Opening/Closing Indication: Rotating the handwheel drives the stem, utilizing threaded transmission for the stable lifting of the disc. The operating torque is low, and the opening/closing process is smooth. The lifting height of the stem directly indicates the valve opening degree, facilitating manual observation and control.5、Low-Temperature Adapted Material, Durable and Economical: Main components are made of corrosion-resistant materials suitable for low-temperature conditions, such as LCB, LC3, and CF8. The structure is robust, ensuring a long service life. The overall design is simple with fewer potential failure points, making routine maintenance and seal replacement relatively convenient.6、Widely Applicable for Low-Temperature Media: Specifically designed for pipeline systems handling low-temperature media like liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, and low-temperature ethylene. Suitable for low-temperature applications requiring reliable shut-off or fluid passage, meeting the demands of industries such as petrochemicals, air separation, and liquefied gas storage and transportation.

OverviewThe DJ541 bevel gear low temperature globe valve is a type of globe valve specifically designed for low-temperature operating conditions and equipped with a bevel gear transmission device. It utilizes the bevel gear mechanism to drive the stem and disc, enabling them to perform a vertical lifting motion along the centerline of the seat, achieving reliable opening and closing of the medium in the pipeline. Its core design feature is the adoption of an extended bonnet structure, which positions the stuffing box away from the low-temperature medium area, ensuring the packing operates at near-ambient temperature. This guarantees the valve maintains good sealing performance and operational reliability under low-temperature conditions. The valve's closure member is a plug-type disc, with sealing surfaces designed as flat or tapered surfaces. The disc moves linearly along the centerline of the fluid. The valve uses a flange connection, secured by bolts to the pipeline flange, offering a compact structure and convenient installation and maintenance. The bevel gear transmission is suitable for larger diameter valves or those requiring higher operating torque. The gear reduction mechanism significantly reduces the operating force, making opening and closing control lighter and smoother. The stem movement type is typically the rising stem type (stem rises, handwheel does not rise), utilizing bevel gear transmission and threaded transmission to efficiently convert rotational force into the linear motion of the stem and disc, achieving stable and sensitive opening and closing control. This valve is suitable for management systems in low-temperature liquid storage and transportation equipment. It features flexible operation, reliable sealing, and labor-saving operation, making it widely used in pipeline systems for low-temperature media such as liquefied natural gas, ethylene, liquid oxygen, and liquid nitrogen. It is particularly suitable for large-diameter pipelines or low-temperature applications requiring reliable shut-off or fluid passage.DJ541 Bevel Gear Low Temperature Globe Valve Product ImageFeatures1、Extended Bonnet Design, Reliable Low-Temperature Sealing: The extended bonnet structure effectively isolates the low-temperature medium from the stuffing box, ensuring the packing operates at near-ambient temperature. This prevents the packing from freezing and failing, guaranteeing the valve's sealing performance and operational reliability under low-temperature conditions.2、Excellent Low-Temperature Sealing Performance: The sealing pair of the disc and seat utilizes a tapered or flat sealing structure. Through precision grinding and pairing, combined with low-temperature elastic gaskets or self-energizing sealing design, it maintains good specific sealing pressure under low-temperature conditions, achieving tight shut-off and effectively preventing internal leakage of the medium.3、Low Fluid Resistance, Optimized Flow Path: The valve body features a streamlined channel design, providing a smooth transition for the medium flow. This significantly reduces flow resistance and pressure loss, making it suitable for low-temperature systems sensitive to pressure drops.4、Bevel Gear Transmission, Light and Labor-Saving Operation: Equipped with a bevel gear transmission device, the gear reduction mechanism significantly lowers the operating torque. This is especially suitable for large-diameter or high-pressure class low-temperature valves. The opening and closing process is smooth and controllable, effectively reducing operating effort while maintaining precise control of the valve position.5、Low-Temperature Adapted Material, Durable and Economical: Main components are made of corrosion-resistant materials suitable for low-temperature conditions, such as LCB, LC3, and CF8. The structure is robust, ensuring a long service life. The overall design is simple with fewer potential failure points, making routine maintenance and seal replacement relatively convenient.6、Widely Applicable for Low-Temperature Media and Large-Diameter Pipelines: Specifically designed for pipeline systems handling low-temperature media like liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon, and low-temperature ethylene. It is particularly suitable for large-diameter pipelines or low-temperature applications requiring frequent operation or higher operating torque, meeting the demands of industries such as petrochemicals, air separation, and liquefied gas storage and transportation for large-diameter low-temperature valves.

DJ41F American Standard Cryogenic Globe Valve Overview The DJ41F American Standard cryogenic globe valve is a low-temperature-specific globe valve strictly designed and manufactured in accordance with American Petroleum Institute (API) standards. It is suitable for ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, and liquid ethylene. The valve body and key components are made of austenitic stainless steel (such as CF8, CF8M) or low-temperature alloy steel (such as LCB, LCC), and undergo deep cryogenic treatment to ensure excellent low-temperature toughness and dimensional stability at temperatures down to -196°C and below. The valve features an extended bonnet design that effectively isolates the effects of low-temperature media on the stuffing box and operating mechanism, preventing packing freeze-up and valve stem seizure. The sealing surfaces of the disc and seat utilize low-temperature-specific soft sealing materials such as PTFE or PCTFE, or are overlaid with hard alloy, ensuring reliable sealing under ultra-low temperature conditions. This valve complies with standards such as API 600 and API 602, and is widely used in LNG receiving terminals, air separation units, low-temperature storage and transportation, and petrochemical low-temperature facilities. It is critical equipment for achieving reliable shut-off under ultra-low temperature conditions.DJ41F American Standard Cryogenic Globe Valve Product ImageDJ41F American Standard Cryogenic Globe Valve Features 1. Strict API Standard Compliance: Design, materials, manufacturing, and testing fully comply with API 600, API 602 and other specifications, ensuring valve reliability and interchangeability under low-temperature conditions, meeting the requirements of international engineering projects.2. Ultra-Low Temperature Materials and Cryogenic Treatment: Constructed from austenitic stainless steel or low-temperature steel, subjected to deep cryogenic treatment to eliminate residual austenite, effectively preventing brittle fracture at cryogenic temperatures and ensuring impact toughness and dimensional stability of materials at -196°C.3. Anti-Freezing Extended Bonnet Design: The extended bonnet structure effectively lengthens the cold conduction path, keeping the stuffing box in a relatively higher temperature zone. This prevents packing freeze-up and valve stem seizure, ensuring flexible and reliable operation.4. Cryogenic-Specific Sealing System: The disc and seat utilize low-temperature-specific soft sealing materials such as PTFE or PCTFE, or are overlaid with hard alloy. Featuring excellent sealing performance and low shrinkage rates at cryogenic temperatures, this ensures bidirectional zero-leakage sealing.5. Fire-Safe and Safety Structure: Typically complies with API 607 fire-safe standards, forming a metal-to-metal secondary seal in case of soft seal failure. The stem features a blowout-proof design, and the packing uses low-temperature-specific materials, ensuring operational safety under extreme conditions.

DJ61H Welded Cryogenic Globe Valve Overview The DJ61H welded cryogenic globe valve is a low-temperature-specific globe valve featuring a welded connection and forged steel body. It is suitable for ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, and liquid argon. The valve body is made of forged steel (such as A105) or stainless steel, and undergoes deep cryogenic treatment to eliminate residual stress, ensuring low-temperature toughness and dimensional stability at -196°C. The valve adopts an extended bonnet design, keeping the stuffing box away from the low-temperature zone to prevent packing freeze-up and valve stem seizure. The sealing surfaces of the disc and seat utilize metal hard sealing or hardfacing with hard alloy, with opening and closing achieved through disc lifting via handwheel operation. Widely used in LNG receiving terminals, air separation units, low-temperature storage and transportation, and petrochemical low-temperature facilities, it is critical equipment for reliable shut-off under ultra-low temperature conditions.DJ61H Welded Cryogenic Globe Valve Product ImageDJ61H Welded Cryogenic Globe Valve Features1. Permanent Sealing with Welded Connection: Utilizing socket weld or butt weld connections that integrate with the pipeline through welding, completely eliminating the risk of leakage at connection points, particularly suitable for low-temperature systems where leakage is not permitted.2. Anti-Freezing Extended Bonnet Design: The long-neck bonnet structure effectively lengthens the cold conduction path, ensuring the bottom temperature of the stuffing box remains above 0°C. This prevents packing freeze-up and valve stem seizure, guaranteeing flexible and reliable operation.3. High Pressure Performance with Forged Steel Body: The valve body is forged from steel (A105) or stainless steel (F304/F316), offering uniform and dense material structure capable of withstanding high-pressure conditions, with working pressure reaching up to 1.6-32.0MPa.4. Deep Cryogenic Treatment Process: All components undergo deep cryogenic treatment to relieve processing stresses, ensuring low-temperature toughness and dimensional stability of materials at -196°C, preventing brittle fracture, deformation, and leakage at cryogenic temperatures.5. Reliable Structure and Convenient Maintenance: The seat and disc sealing elements are easy to repair or replace without removing the entire valve from the pipeline, which is particularly advantageous for applications where the valve and pipeline are welded together as one unit.

DJ944W Electric Cryogenic Angle Globe Valve Overview The DJ944W electric cryogenic angle globe valve is a low-temperature-specific globe valve driven by an electric actuator and featuring an angle-style body design. It is suitable for ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, and liquid argon. The valve body adopts an angle structure, allowing the medium to change direction only once, resulting in lower flow resistance compared to straight-through globe valves. Key components of the valve are manufactured from low-temperature-resistant materials and undergo deep cryogenic treatment to eliminate residual stress, ensuring low-temperature toughness and dimensional stability at -196°C. The sealing surfaces of the disc and seat utilize metal hard sealing or hardfacing with hard alloy, with opening and closing achieved through stem lifting driven by an electric actuator. Widely used in LNG receiving terminals, air separation units, low-temperature storage and transportation, and petrochemical low-temperature facilities, it is critical equipment for automated shut-off control under ultra-low temperature conditions.DJ944W Electric Cryogenic Angle Globe Valve Product ImageDJ944W Electric Cryogenic Angle Globe Valve Features 1. Integrated Electric Intelligent Control: Equipped with an electric actuator supporting both on-off and modulating control, accepting standard signals such as 4-20mA, enabling remote automatic operation. Features include overload protection, temperature protection, and manual operation capabilities, facilitating integration into automated systems.2. Low Flow Resistance with Angle Structure: The angle-style design allows the medium to change direction only once, resulting in lower pressure loss compared to straight-through globe valves. Particularly suitable for installation at pipeline corners, saving valuable space.3. Ultra-Low Temperature Materials and Cryogenic Treatment: The valve body is constructed from stainless steel or low-temperature alloy steel, subjected to deep cryogenic treatment for stress relief, ensuring low-temperature toughness and dimensional stability at -196°C, preventing brittle fracture, deformation, and leakage at cryogenic temperatures.4. Durable Metal Hard Sealing: The disc and seat sealing surfaces are hardfaced with hard alloy, providing resistance to low-temperature impact, erosion, and wear. This ensures reliable sealing under ultra-low temperature conditions with extended service life.5. Reliable Structure and Wide Applicability: Intended for fully open and fully closed positions only, not for regulation or throttling. Features flexible operation and reliable sealing, suitable for various low-temperature media including liquid oxygen, liquid nitrogen, liquid argon, and liquefied natural gas.

API Standard Cryogenic Globe Valve OverviewThe API standard cryogenic globe valve is a specialized valve designed and manufactured in strict accordance with the American Petroleum Institute (API) standards. It is suitable for ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, and liquid nitrogen. The valve body and key components are made of austenitic stainless steel (e.g., 304, 316) or low-temperature alloy steel (e.g., LCB, LCC) and undergo cryogenic treatment to ensure excellent toughness and mechanical properties at temperatures down to -196°C and below. The valve features an extended bonnet design, which effectively isolates the stuffing box and operating mechanism from the cryogenic media, preventing the packing from freezing. The sealing surfaces are typically overlaid with hard alloy or made of special cryogenic materials, and the valve opens and closes through the lifting of the disc. This valve complies with standards such as API 602 and API 600 and is widely used in LNG terminals, air separation units, cryogenic storage and transportation, and petrochemical low-temperature systems. It is a core device for reliable shut-off under ultra-low temperature conditions.API Standard Cryogenic Globe Valve Product ImageAPI Standard Cryogenic Globe Valve Features1. Compliance with Strict API Standards: Design, materials, manufacturing, and testing strictly follow API 600, API 602, and other specifications, ensuring valve reliability and interchangeability under low-temperature conditions.2. Ultra-Low Temperature Materials and Cryogenic Treatment: Made of austenitic stainless steel or low-temperature steel, subjected to cryogenic treatment to eliminate residual austenite, effectively preventing low-temperature brittle fracture and ensuring material stability at -196°C.3. Anti-Freezing Extended Bonnet Design: The extended bonnet structure effectively lengthens the cold conduction path, keeping the stuffing box in a higher temperature zone to prevent packing freezing and stem seizure.4. Low-Temperature Resistant Hard Seal: The sealing surfaces of the disc and seat are overlaid with hard alloy or made of special low-temperature materials, resistant to low-temperature impact and erosion, ensuring reliable sealing under ultra-low temperature conditions.5. Fire-Safe and Safety Structure: Typically complies with API 607 fire-safe standards. The stem features a blowout-proof design, and the packing uses special low-temperature materials, ensuring operational safety under extreme conditions.

OverviewDJ64F socket welded low-temperature angle globe valve is a special angle structure valve designed specifically for deep cold working conditions. It drives the valve disc to move vertically along the centerline of the valve seat through the valve stem, achieving reliable opening and closing and flow regulation of the pipeline. The core of its design lies in the use of a 90 ° angle flow channel structure, which can change the flow direction of the medium and reduce the installation of pipeline bends. At the same time, the valve body is forged and made of low-temperature toughness materials such as austenitic stainless steel, ensuring excellent impact resistance and structural integrity in extremely low temperature environments. The key components of the valve are treated with cryogenic technology and special sealing design, combined with an extended valve cover structure to effectively isolate the influence of low-temperature media on the packing box and operating mechanism, preventing frost and operational blockage caused by cold leakage. The valve adopts socket welding connection method, which achieves permanent sealing connection through groove welding between the pipeline and the valve body. It is suitable for high-pressure and high-risk low-temperature pipeline systems. Valves can be driven by manual devices or matching electric/pneumatic devices to convert input force into linear motion of the valve disc, achieving smooth and reliable opening, closing, and regulating control. This valve is designed specifically for the transportation of ultra-low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and ethylene. It is particularly suitable for harsh operating conditions that require compact installation, high sealing, and long-term stable operation in cryogenic environments ranging from -46 ℃ to -196 ℃ in fields such as air separation units, liquefied gas storage and transportation, low-temperature chemical engineering, and aerospace.Product drawing of DJ64F socket welded low-temperature angle globe valvefeature1. Special cryogenic structure and material design: adopting a 90 ° angle valve body structure, optimizing pipeline layout, and reducing the installation of elbows; The valve body is made of forged austenitic stainless steel or low-temperature alloy steel, which undergoes cryogenic treatment to ensure excellent toughness even in ultra-low temperature environments of -196 ℃ and below, completely avoiding the risk of low-temperature brittle fracture.2. Reliable cryogenic sealing system: The sealing surfaces of the valve disc and seat are made of cobalt based hard alloys (such as Stellite) or reinforced stainless steel materials, which are precisely ground and matched; Combined with elastic load sealing design, it compensates for low-temperature shrinkage deformation and achieves zero leakage sealing under extreme temperature alternating conditions.3. Effective cooling isolation design: adopting an elongated valve cover structure, significantly increasing the distance between the valve stem and the low-temperature flow channel, effectively blocking the conduction of cooling to the packing box and actuator, preventing external frosting and freezing, and ensuring stable operation of the operating mechanism at room temperature.4. High pressure compact connection method: using socket welding connection interface, achieving permanent integrated connection with the pipeline through full penetration groove welding, with absolutely reliable sealing, high strength, and few leakage points, especially suitable for high-pressure, high-risk and low-temperature medium pipeline systems.5. Suitable for ultra-low temperature harsh media: specially designed for liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, liquid ethylene and other media, with materials and structures that meet cryogenic standards, suitable for key fields such as air separation, LNG receiving stations, low-temperature storage and transportation, and specialty chemicals.6. Stable operation and flexible configuration: The valve stem adopts a lifting and non rotating design, with small opening and closing torque and smooth action; The standard configuration is manual operation (with an extended handwheel for easy operation outside the insulation layer), and optional pneumatic and electric actuators can be equipped to achieve remote automation control and precise adjustment.

DH11W Cryogenic Check Valve OverviewThe DH11W cryogenic check valve is an automatic valve specially designed for ultra-low temperature service, featuring an internal thread connection and a lift-type structure. It is suitable for media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene. The valve body and critical components are made of cast stainless steel. The disc is manufactured from copper alloy, and the sealing ring utilizes cryogenic-specific materials such as PCTFE (Polychlorotrifluoroethylene), ensuring sealing reliability at -196°C. The valve opens and closes automatically by the flow of the medium itself: forward flow lifts the disc to open the valve, while reverse flow, combined with the disc's (self-weight), forces the disc to close automatically, preventing backflow. This valve has a nominal pressure rating of PN1.6MPa and must be installed horizontally. It is widely used in small-diameter piping systems within air separation units, cryogenic storage and transportation, and the petrochemical industry.DH11W Cryogenic Check Valve Product ImageDH11W Cryogenic Check Valve Features1. Internal Thread Connection for Easy Installation: Features a standard internal thread connection with a compact structure, making installation and disassembly convenient, particularly suitable for small-diameter pipelines (DN10-DN50) and confined spaces.2. Lift-Type Structure for Reliable Seal: Utilizes a lift-type design where the disc moves vertically, ensuring tight engagement with the seat. It provides quick and reliable closure, effectively preventing medium backflow.3. Cryogenic Treatment and Low-Temperature Materials: The valve body is made of cast stainless steel, and the disc is made of copper alloy. All components undergo low-temperature pre-treatment to prevent sealing deformation and leakage caused by temperature fluctuations during service.4. Wide Applicable Temperature Range: Suitable for temperatures ranging from -198°C to +80°C, meeting the service requirements of various ultra-low temperature media such as liquid oxygen, liquid nitrogen, liquid argon, and liquefied natural gas.5. Compact Structure with Strict Installation Orientation: Features small structural dimensions and light weight. However, it must be installed strictly horizontally to ensure the disc falls back freely by gravity, guaranteeing reliable check valve function.

DH44W Flanged Cryogenic Check Valve OverviewThe DH44W flanged cryogenic check valve is an automatic valve specially designed for ultra-low temperature service, featuring a flange connection and a swing-type structure. It is suitable for media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen, liquid ammonia, and liquid ethylene. The valve body and critical components are made of LCB low-temperature carbon steel, CF8 stainless steel, or forged F304/F316L stainless steel. All parts undergo cryogenic pre-treatment to ensure low-temperature toughness and dimensional stability at -196°C. The valve opens and closes automatically by the flow of the medium itself: forward flow pushes the disc to swing open, while reverse flow applies pressure above the disc, automatically closing it to prevent backflow. This valve is widely used in LNG terminals, air separation units, cryogenic storage and transportation, and petrochemical low-temperature plants, serving as critical equipment for reliable backflow prevention under ultra-low temperature conditions.DH44W Flanged Cryogenic Check Valve Product ImageDH44W Flanged Cryogenic Check Valve Features1. Cryogenic Treatment and Low-Temperature Materials: All parts undergo low-temperature pre-treatment using liquid nitrogen to prevent sealing deformation and leakage caused by temperature fluctuations during service. Strict control over chemical composition and low-temperature impact toughness ensures material stability at -196°C.2. Swing-Type Structure for Low Flow Resistance: Features a swing-type design where the disc rotates around a pivot shaft. The straight-through flow path results in low resistance to media flow. Suitable for both horizontal and vertical installation (with flow direction upward), offering strong installation adaptability.3. Flanged Connection for Easy Installation: Utilizes standard flange connections, making installation and disassembly more convenient. It allows efficient connection with various cryogenic equipment and pipelines, facilitating maintenance.4. Automatic Operation and Reliable Seal: Opens and closes the disc automatically by the flow of the medium itself, preventing backflow and protecting pumps and drive motors from reverse rotation. The sealing surfaces of the disc and seat are overlaid with hard alloy or utilize cryogenic-specific materials to ensure reliable sealing.5. Wide Range of Applications: Suitable for various cryogenic media including methane, ethane, propane, liquid ammonia, liquid oxygen, liquid nitrogen, LNG, carbon dioxide, and ethylene. Pressure ratings cover PN16-PN100 or Class150-Class900.

DH61W Cryogenic Welded Check Valve OverviewThe DH61W cryogenic welded check valve is a specialized automatic valve designed for ultra-low temperature applications, featuring welded connections and a forged stainless steel body. It is suitable for cryogenic media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene. The valve body and key components are made of stainless steel and undergo deep cryogenic treatment to eliminate residual stress, ensuring low-temperature toughness and dimensional stability at -196°C. The valve opens and closes automatically by the flow of the medium itself—when the medium flows in the forward direction, it exerts pressure on the underside of the disc to open the valve; when backflow occurs, pressure on the top of the disc forces it closed, preventing reverse flow. The sealing ring is made of PTFE or other materials specifically designed for low-temperature service, and the valve is permanently integrated with the pipeline via welded connections. Widely used in LNG terminals, air separation units, cryogenic storage and transportation systems, and low-temperature installations in the petrochemical industry, this valve is a critical component for reliable backflow prevention under ultra-cold operating conditions.DH61W Cryogenic Welded Check Valve Product ImageDH61W Cryogenic Welded Check Valve Features1. Welded Connection for Permanent Seal: Utilizes socket welding or butt welding to integrate the valve with the pipeline, eliminating potential leakage paths at connections. This makes it ideal for cryogenic systems where leakage is unacceptable.2. Deep Cryogenic Treatment: All components undergo pretreatment with liquid nitrogen to prevent sealing deformation and leakage caused by temperature fluctuations during operation. This ensures material toughness and dimensional stability at -196°C.3. Stainless Steel for Low-Temperature Resistance: The body, bonnet, and disc are constructed from stainless steel, offering excellent mechanical properties and suitability for various cryogenic media including liquid oxygen, nitrogen, argon, and LNG.4. Specialized Low-Temperature Sealing System: Employs sealing rings made of PTFE or other cryogenic-specific materials with a low shrinkage rate at low temperatures, ensuring reliable sealing and smooth opening and closing.5. Reliable and Self-Actuating Operation: The disc opens and closes automatically based on the flow of the medium, requiring no external actuation. The medium flows from below the disc, ensuring reliable check valve function.

DZXP Pneumatic Cryogenic Control Valve Overview The DZXP Pneumatic Cryogenic Control Valve is a specialized control valve designed for precise flow regulation of ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, and liquid argon. It is driven by a pneumatic diaphragm actuator.The valve consists of two main parts: a pneumatic diaphragm actuator and a low-temperature resistant single-seat valve body. The body is manufactured using precision casting or forging construction, with materials selected from low-temperature resistant stainless steel or specialized cryogenic alloys. These materials undergo special treatment to ensure stable performance at temperatures as low as -196°C.Its core feature is the extended bonnet design, which positions the stuffing box to operate at ambient temperature, preventing the packing from freezing and the valve stem from seizing. To ensure regulation accuracy, a valve positioner must be installed.This valve is widely used in automatic control systems for industrial processes such as petroleum, chemical, metallurgy, air separation, and oxygen production. It is a critical piece of equipment for achieving precise regulation under ultra-low temperature working conditions.DZXP Pneumatic Cryogenic Control Valve Product ImageDZXP Pneumatic Cryogenic Control Valve Features1. Precise Regulation with Pneumatic Diaphragm Actuation: Equipped with a multi-spring pneumatic diaphragm actuator, the valve receives signal pressure from the controller. The diaphragm generates thrust to move the valve plug, changing the flow area and achieving continuous and precise regulation of medium flow.2. Extended Bonnet Anti-Freezing Design: The long-neck bonnet structure positions the stuffing box away from the low-temperature zone, keeping it operating at ambient temperature. This effectively prevents the packing from freezing and the valve stem from seizing, while also reducing heat ingress from the outside.3. Stable Performance with Ultra-Low Temperature Materials: Key components such as the body, valve plug, and stem are manufactured from low-temperature resistant stainless steel materials like 304 and 316. These materials possess excellent low-temperature toughness and dimensional stability, making them suitable for media regulation at temperatures ranging from -60°C to -250°C.4. Compact Structure with Sensitive Response: The valve features a compact overall structure, light weight, sensitive response, low pressure drop, high flow capacity, and precise flow characteristics. The flow characteristics conform to equal percentage or linear characteristics.5. Bellows Seal to Prevent External Leakage: A bellows seal structure provides a complete seal around the moving valve stem, preventing fluid leakage to the atmosphere. This is particularly suitable for cryogenic applications where leakage is not permitted.

DZZWP Electric Cryogenic Control Valve Overview The DZZWP Electric Cryogenic Control Valve is a specialized control valve driven by an electric actuator, designed for precise flow regulation of ultra-low temperature media such as Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid argon, and liquid ethylene. The valve consists of an electric actuator and a low-temperature resistant single-seat control valve body.It features a long-neck bonnet structure, which positions the stuffing box away from the cold zone, preventing the packing from freezing and the valve stem from seizing. The valve body is manufactured from low-temperature resistant stainless steel and undergoes deep cryogenic treatment to eliminate residual stresses, ensuring excellent low-temperature toughness and dimensional stability at temperatures as low as -196°C.The electric actuator is equipped with a built-in servo system and can directly receive standard control signals such as 4-20mA, eliminating the need for an external servo amplifier. This enables continuous and precise regulation of medium flow.This valve is widely used in air separation units, LNG terminals, petrochemical low-temperature installations, and industrial processes requiring automated temperature control.DZZWP Electric Cryogenic Control Valve Product ImageDZZWP Electric Cryogenic Control Valve Features 1. Integrated Electric Control: The electric actuator features a built-in servo system that can directly receive standard control signals such as 4-20mA or 0-10V, eliminating the need for an external servo amplifier. This provides simple wiring and high control accuracy.2. Extended Bonnet Anti-Freezing Design: The long-neck bonnet structure effectively lengthens the path for cold conduction, keeping the stuffing box in a higher temperature zone. This prevents the packing from freezing and the valve stem from seizing, ensuring flexible and reliable operation at cryogenic temperatures.3. Ultra-Low Temperature Materials and Cryogenic Treatment: Key components such as the body, valve plug, and stem are manufactured from low-temperature resistant stainless steel materials like 304 and 316. They undergo deep cryogenic treatment to relieve stress, ensuring low-temperature toughness and dimensional stability at -196°C.4. High Regulation Accuracy and Reliable Sealing: The valve plug utilizes a top-guided structure, suitable for applications with strict leakage requirements, low pressure differential across the valve, and media with certain viscosity or containing fibrous substances. It offers excellent sealing performance.5. Multiple Protection Functions: The actuator is equipped with various protection functions, including overload protection, temperature protection, and a compression spring to ensure tight valve shut-off, guaranteeing safe and reliable system operation.