Y43X Pilot-Operated Piston Pressure Reducing Valve OverviewThe Y43X Pilot-Operated Piston Pressure Reducing Valve is a high-performance pressure regulation device designed based on the hydraulic linkage principle. Through the precise sensing of the pilot valve and the linkage control of the main valve piston, it achieves automatic and stable regulation of system pressure. Driven by the medium's own energy, the valve can accurately and stably reduce the fluctuating high-pressure fluid at the inlet to a preset outlet pressure value, while effectively suppressing the interference of flow changes on the outlet pressure. Its design balances control precision and structural strength, making it suitable for industrial fluid control systems with high requirements for pressure stability. Typically adopting a flange connection and cast steel valve body structure, the valve is widely used in water supply pipe networks, fire protection systems, industrial circulating water, and medium-low pressure steam pipelines. It is one of the core equipment for realizing system pressure zoning management and ensuring the safe operation of equipment.Y43X Pilot-Operated Piston Pressure Reducing Valve Product ImageY43X Pilot-Operated Piston Pressure Reducing Valve Features1. Pilot-piston linkage for precise controlAdopts a two-stage regulation mechanism where the pilot valve senses pressure signals and the main valve piston executes control. The pilot valve responds sensitively to pressure changes, driving the main valve piston to move smoothly through hydraulic transmission. It achieves high-precision pressure control under large flow conditions, with pressure stabilization performance superior to direct-acting pressure reducing valves.2. Balanced piston structure for easy regulationThe main valve adopts a balanced piston design, which effectively offsets the unbalanced force of the medium on the valve disc. This allows the valve to open and close easily even under high pressure difference conditions, with good action linearity. The structure significantly reduces execution resistance and extends the service life of the valve.3. Wide pressure reduction range and strong adaptabilityHas a large pressure reduction ratio range (usually up to 8:1 or more), and the outlet pressure can be easily set by adjusting the pilot valve spring. The internal flow channel is optimally designed to balance pressure stabilization performance and flow capacity, making it suitable for working conditions with large fluctuations in inlet pressure.4. Self-cleaning and anti-pollution designThe main valve piston has a self-cleaning function during reciprocating movement, which can prevent impurity deposition and jamming. The pilot control circuit is equipped with a filtering device as standard, which effectively intercepts pipeline particles, protects precision pilot components, and ensures reliable long-term operation of the valve in general water quality.5. Compact structure and convenient maintenanceAdopts a modular design, where the pilot valve and main valve body can be separated for quick inspection, repair and maintenance of key components. The flange connection ensures stable installation. Some models are equipped with pressure gauge interfaces and safety valve options to support function expansion and system integration.

YK43F High-Pressure Gas Pressure Reducing Valve OverviewThe YK43F high-pressure gas pressure reducing valve is a pilot-operated piston-type precision pressure reducing device specially designed for high-pressure gas source systems. Adopting the principle of multi-stage pressure reduction and pressure feedback control, it can safely and accurately reduce unstable high-pressure gases (such as nitrogen, hydrogen, natural gas, compressed air, etc.) in gas cylinders, storage tanks or pipelines to the stable low pressure required by the system. Combining the micro-pressure sensing of the pilot valve with the powerful execution of the main valve, the valve achieves smooth pressure reduction and precise pressure stabilization under high pressure difference conditions. It is a key control equipment to ensure the safety of high-pressure gas transmission systems and the stable operation of downstream equipment. The valve adopts a high-strength alloy steel or stainless steel valve body, usually equipped with flange or high-pressure threaded interfaces. It is widely used in high-pressure gas control systems such as energy and chemical industry, gas filling, laboratory gas supply, industrial cutting and welding, and special gas transmission.YK43F High-Pressure Gas Pressure Reducing Valve Product ImageYK43F High-Pressure Gas Pressure Reducing Valve Features High pressure difference adaptability with smooth pressure reduction Specifically designed for high-pressure gas working conditions, it adopts a multi-stage pressure reduction or special flow channel structure. It can effectively decompose pressure differences, reduce gas flow velocity, and avoid icing caused by adiabatic expansion. This ensures the smooth transition of high-pressure gas during pressure reduction, with stable and impact-free outlet pressure.Pilot precision control for accurate pressure stabilization Built-in high-sensitivity pilot valve responds sensitively to changes in outlet pressure, and precisely drives the main valve piston to adjust the opening through gas pressure feedback. This design maintains outlet pressure accuracy even when the inlet pressure fluctuates significantly or the flow rate changes sharply, with a control deviation usually kept within ±5%.All-metal sealing structure for safety and reliability Key sealing parts such as valve seats and discs adopt cemented carbide or stainless steel metal-to-metal sealing. They resist high-pressure erosion and gas corrosion, eliminating the risk of aging and failure of polymer sealing materials in high-pressure gas environments, and ensuring long-term sealing reliability and intrinsic system safety.Comprehensive safety protection with high integration Comes standard with a high-pressure filter screen to prevent pipeline impurities from entering the pilot system. Most models integrate a safety relief valve, which can automatically relieve pressure for protection when the outlet pressure rises abnormally. The valve body is designed and manufactured in accordance with high-pressure vessel standards, and has passed strict air tightness and strength tests, complying with high-pressure gas equipment safety specifications.Professional operation and maintenance, adaptable to harsh environments Equipped with a precision pressure adjustment handle with a locking mechanism to prevent misoperation. Adopts a modular design, allowing on-line maintenance and replacement of key components. The special surface treatment adapts to outdoor, marine or corrosive industrial environments, making it a professional solution for high-reliability high-pressure gas control.

ZZYVP Self-Operated Nitrogen-Sealing Pressure Regulating Valve OverviewThe ZZYVP self-operated nitrogen-sealing pressure regulating valve is a self-operated micro-pressure control device specifically designed for the nitrogen sealing protection system of storage tanks. Adopting the medium self-driven force balance principle, the valve senses pressure changes in the gas phase space at the top of the storage tank through a sensitive diaphragm, automatically adjusting the nitrogen supply or exhaust volume to accurately maintain the internal tank pressure within the set micro-positive pressure range (usually 0.1-5kPa). Its core function is to isolate air through a continuous and stable nitrogen blanket, preventing oxidation, volatilization or moisture absorption of materials in the tank while ensuring the structural safety of the storage tank. It is widely used in the tank protection systems for volatile liquids or sensitive materials in chemical, petroleum, pharmaceutical, food and other industries.ZZYVP Self-Operated Nitrogen-Sealing Pressure Regulating Valve Product ImageZZYVP Self-Operated Nitrogen-Sealing Pressure Regulating Valve Features 1. Specialized Micro-Pressure Control for Nitrogen SealingDesigned specifically for the special requirements of tank nitrogen sealing working conditions, it can achieve high-precision control of micro-positive pressure within the range of 0.1-5kPa (sensitivity up to ±50Pa). Equipped with a special low-pressure difference diaphragm and light-load spring set, it ensures operational sensitivity and control stability under micro-gas regulation conditions.2. Dual-Action Control ModeIntegrates dual functions of nitrogen supply regulation and nitrogen relief control. Automatically opens to supplement nitrogen when the internal tank pressure is lower than the set value, and automatically opens to exhaust when the pressure is higher than the set value, maintaining dynamic pressure balance inside the tank. A single valve achieves bidirectional regulation, simplifying the system structure and reducing installation costs.3. Corrosion Resistance and Sealing Safety DesignComponents in contact with gas inside the valve are made of stainless steel or polytetrafluoroethylene (PTFE), resistant to corrosion from nitrogen and chemical volatile gases. The sealing structure adopts soft-hard composite sealing or metal bellows sealing to achieve long-term zero leakage, preventing external air infiltration or ineffective nitrogen escape.4. Adaptive Performance and Safety RedundancyBuilt-in damping mechanism can suppress pressure sudden change interference caused by material inlet and outlet of the tank. Optional dual-valve combination or overpressure rupture disc is available as safety redundancy to ensure tank pressure safety under extreme working conditions. The pressure tapping port design can be equipped with an isolation tank to prevent medium crystallization or blockage from affecting pressure sensing.5. Energy-Saving Self-Drive and Intelligent IntegrationNo external energy source is required; the valve is driven by pressure changes of the tank itself, which is energy-saving and suitable for explosion-proof areas. It can be integrated with pressure transmitters and digital controllers to upgrade into an intelligent nitrogen sealing system, supporting remote monitoring, pressure curve recording and fault early warning, realizing refined energy management and safety control.

Y42F Stainless Steel Pressure Reducing Valve OverviewThe Y42F Stainless Steel Pressure Reducing Valve is a high-performance pressure regulating valve featuring an all-stainless steel structure and pilot-operated control principle. It senses downstream pressure changes via a precision pilot valve and uses the medium’s own hydraulic pressure to drive the main valve disc for precise movement, achieving automatic adjustment of inlet pressure and stable output. Its core function is to continuously stabilize unstable or excessively high fluid pressure in the system within a preset safe operating range, effectively protecting downstream precision instruments, pipelines and equipment from pressure fluctuations and overpressure damage. The valve body is integrally forged from stainless steel, boasting a robust and compact structure. It is widely applied in chemical, pharmaceutical, food and beverage, marine, and high-purity pipeline systems—suitable for working conditions with strict requirements for corrosion resistance and pressure control precision. Y42F Stainless Steel Pressure Reducing Valve Product ImageY42F Stainless Steel Pressure Reducing Valve Features1. All-Stainless Steel Construction, Strong Corrosion Resistance The valve body, bonnet, and internal components are integrally machined from 304/316 stainless steel, offering excellent corrosion resistance, high-temperature resistance, and intergranular corrosion resistance. It can withstand water, steam, grease, and various weakly corrosive chemical media for long-term use, suitable for hygienic and high-purity working environments.2. Pilot-Operated Control, Precise Pressure Stabilization Adopts hydraulic control with linkage between an independent pilot valve and main valve. It highly sensitively detects downstream pressure fluctuations and uses hydraulic amplification to precisely drive the main valve disc for flow area adjustment. This achieves high-precision stable pressure output under large-flow conditions with strong anti-interference capability.3. Built-In Filtration, Reliable Operation The pilot control circuit is equipped with a standard high-mesh stainless steel filter screen, which effectively intercepts pipeline impurities. It protects the precision structure of the pilot valve from clogging and wear, ensuring long-term stable operation of the valve in complex media and significantly extending service life.4. Intuitive Adjustment, Easy Maintenance A precision pressure adjustment mechanism with scale indication is installed on the top of the bonnet. The outlet pressure can be intuitively set and locked by rotating the adjusting screw. The modular design of the pilot valve and main valve assembly allows for quick disassembly and maintenance, with easy replacement of wearing parts.5. Multi-Functional Integration, Flexible Application In addition to basic pressure reducing function, it can be optionally equipped with pressure gauge interfaces, safety relief valves, external pressure guiding pipes and other accessories. It meets diverse needs such as system monitoring, overpressure protection, and remote control, especially suitable for marine ballast systems, chemical process control, and supporting special equipment.

Y45H Lever-Operated Pressure Reducing Valve Overview The Y45H lever-operated pressure reducing valve assembly is a mechanical pressure regulation device consisting of a lever-operated pressure reducing valve, upstream and downstream shut-off valves, a filter, pressure gauges, and accessories. This valve assembly operates based on the lever-and-weight balancing principle, utilizing a lever mechanism to balance the force of the weight or spring against the medium pressure. This drives the valve disc to automatically adjust its opening, achieving stable pressure reduction control. The valve body is constructed from cast steel or stainless steel, featuring a robust and straightforward design suitable for steam, gas, and stable liquid media. Requiring no external energy source, the valve assembly provides stable and reliable regulation. It is widely used in heating systems, power plants, industrial boilers, and other pipeline applications where explosion-proof requirements are stringent or external power is unavailable.Y45H Lever-Operated Pressure Reducing Valve Product ImageY45H Lever-Operated Pressure Reducing Valve Features 1. Lever-Based Mechanical Regulation: Utilizes a lever-weight or lever-spring balancing structure. The mechanical principle is straightforward and reliable, requiring no external power, making it suitable for explosion-proof environments and applications without an external energy supply.2. Stable Regulation and Strong Anti-Interference Capability: The lever system possesses significant inertia, responding gradually to pressure fluctuations. This ensures excellent output pressure stability and strong resistance to disturbances from sudden flow changes.3. Robust Structure and Simple Maintenance: The lever mechanism is externally accessible, facilitating observation and adjustment. Maintenance does not require complex tools. The design offers high durability and low failure rates.4. High Safety and Strong Adaptability: Suitable for various media including steam, compressed air, and nitrogen. Particularly well-suited for high-temperature and high-vibration environments, ensuring high safety levels.5. Cost-Effective and Flexible Configuration: Can be integrated with upstream/downstream valves, filters, and pressure gauges to form a complete valve assembly, or installed independently to meet different on-site requirements.

YK43X Nitrogen Pressure Reducing Valve Overview The YK43X nitrogen pressure reducing valve is a high-precision pilot-operated pressure reducing device specifically designed for nitrogen medium. Adopting piston-pilot linkage and gas-compatible sealing technology, it can stably and accurately reduce the high-pressure nitrogen on the gas source side to the set pressure required by the process system. Optimized structurally for the inert and dry characteristics of nitrogen, the valve ensures gas purity while achieving reliable pressure regulation. It is widely used in occasions with strict requirements for gas quality and pressure stability, such as chemical protective gas systems, electronic industry nitrogen-filled environments, food packaging inerting processes, and laboratory high-purity gas supply. The valve features a stainless steel or copper alloy valve body, equipped with an oil-free treated inner cavity and dedicated sealing components, supporting flange or ferrule connections. It is a core equipment for safe pressure stabilization and flow control in nitrogen transmission systems.YK43X Nitrogen Pressure Reducing Valve Product ImageYK43X Nitrogen Pressure Reducing Valve Features 1. Nitrogen-Compatible Sealing and MaterialsThe internal sealing elements are made of special materials (such as enhanced PTFE and fluoroelastomer) that have passed nitrogen compatibility testing, avoiding gas contamination caused by material aging. The flow channel surface is polished or nickel-plated to reduce gas adsorption and residue, ensuring the purity and chemical stability of the output nitrogen.2. High-Precision Pilot Pressure Stabilization ControlThe micro pilot valve senses fluctuations in outlet pressure and links with the main valve piston for proportional regulation, achieving high-precision pressure reduction when the inlet pressure ranges from 0.5 to 20MPa (control accuracy up to ±3%). The balanced piston structure effectively suppresses the interference of flow changes on outlet pressure, making it suitable for working conditions with frequent fluctuations in gas consumption.3. Anti-Crystallization and Dry Gas Optimized DesignTargeting the characteristic of low-temperature condensation easily caused by high-pressure nitrogen pressure reduction, key parts of the valve body adopt low-temperature resistant materials and optimized heat conduction structure to prevent malfunction due to local icing. The internal flow channel avoids dead ends, reducing the accumulation of moisture or impurities, and is suitable for long-term stable transmission of dry nitrogen.4. Safety Redundancy and Operational ProtectionComes standard with a high-mesh sintered filter to protect the pilot circuit, and the outlet can be optionally equipped with dual protection of a safety relief valve or rupture disc. The adjusting mechanism uses a precision handwheel with locking function to prevent pressure drift caused by vibration, and is equipped with a pressure gauge interface for real-time monitoring.5. Modular Maintenance and Long-Life DesignThe main valve and pilot valve adopt a separable modular structure, supporting quick replacement of seals and filter units. Key components undergo wear-resistant and anti-corrosion treatment, significantly extending the service life under continuous operation conditions. No overall disassembly is required during maintenance, reducing system downtime and operating costs.

YK43F Pilot-Operated Oxygen Pressure Reducing Valve Overview The YK43F pilot-operated oxygen pressure reducing valve is a safety-oriented pressure reducing device specifically designed for high-purity oxygen transmission systems. Adopting a special structure combining pilot control and metal sealing technology, it can stably and accurately reduce the high-pressure oxygen in oxygen cylinders or oxygen supply pipelines to the low-pressure output required by the process. Strictly complying with the special requirements of explosion-proof, oil-free and pollution-proof for oxygen medium, the valve eliminates the risk of combustion and explosion while ensuring pressure control precision through multiple safety designs and material optimization. It is a core safety equipment in fields such as medical oxygen supply, metal cutting, aerospace propulsion and chemical oxidation. The valve is made of oil-free treated brass or stainless steel, equipped with a misoperation-preventive structure and oxygen-specific interfaces. It strictly meets the safety technical specifications for oxygen equipment, serving as a key guarantee for safe pressure reduction and stable supply in high-pressure oxygen systems.YK43F Pilot-Operated Oxygen Pressure Reducing Valve Product ImageYK43F Pilot-Operated Oxygen Pressure Reducing Valve Features 1. Oxygen-Specific Safety DesignThe entire valve is manufactured using oil-free and degreasing processes, with all components strictly degreased, cleaned and hermetically packaged. The flow channel design avoids dead ends where impurities can accumulate. Metal materials compatible with oxygen (such as brass, stainless steel, nickel-based alloys) are selected, eliminating the risk of combustion and explosion caused by oil contamination from the source.2. Dual Pressure Stabilization and Precision ControlAdopts a two-stage control structure with separate pilot valve and main valve. The pilot stage achieves sensitive detection and amplification of pressure signals, while the main valve stage realizes precise large-flow regulation through a balanced piston. This design can stably reduce the inlet pressure (usually 15-20MPa) to the working pressure of 0.1-1.6MPa, with a control accuracy of ±2%.3. All-Metal Hard Seal StructureKey sealing parts adopt metal-to-metal hard seal form (such as stainless steel valve seat and PTFE-enhanced seal ring). It not only ensures the reliability of high-pressure sealing but also avoids the decomposition risk of non-metallic materials in high-pressure pure oxygen environment, providing excellent long-term operational stability.4. Multiple Safety Protection MechanismsComes standard with a bronze sintered filter to prevent pipeline impurities from entering the pilot system. The outlet end integrates an explosion-proof safety diaphragm or spring-loaded safety valve. The adjusting mechanism is equipped with an anti-loosening locking device. Some models are provided with pressure gauge shockproof fluid and flame arrester interface, forming a complete safety protection system.5. Professional Operation and MaintenanceEquipped with a fine-adjustment handwheel with a dust cover, enabling stepless pressure regulation and preventing accidental contact. The valve body is marked with a permanent oxygen medium identifier. Maintenance must be performed by professional personnel using special tools. All components comply with the "Oxygen Safety Technical Regulations" standard, with clear regular inspection cycles to ensure safe and controllable whole-life cycle.