OverviewThe DYP940F top-entry hemispherical valve is an electrically driven eccentric hemispherical valve that adopts a top mounted structure. Its core feature is that all internal components of the valve (valve core, valve seat, valve stem) can be assembled, inspected, and maintained through the opening above the valve body, without the need to remove the valve from the pipeline. The valve is opened and closed by driving the eccentric hemispherical valve core to rotate 90 degrees through an integrated electric actuator. The "F" in the model usually represents that the valve seat is made of soft sealing material (such as reinforced polytetrafluoroethylene PTFE). The top-down design greatly simplifies online maintenance, making it particularly suitable for harsh working conditions with limited space, high requirements for maintenance convenience, or no interruption of processes. It is a key equipment in the fields of petroleum, chemical, natural gas, and long-distance pipelines that pursues high reliability and low maintenance costs.DYP940F Top-Entry Hemispherical Valve Product DiagramFeature1. Unique online maintenance capability: Thanks to the top mounted structure, when internal seals need to be repaired or replaced, all internal components can be removed from above by simply opening the pressure seal cover or maintenance cover on the top of the valve body, without cutting or disassembling the pipeline. This greatly reduces maintenance downtime, workload, and costs.2. Eccentric structure and soft seal design: Adopting an eccentric valve stem design ensures that the valve core instantly disengages from the valve seat during opening and closing, achieving frictionless operation and reducing operating torque. When closed, self wedging force is generated with the help of eccentricity, combined with the "F" type soft valve seat, which can achieve bubble level sealing and zero leakage, suitable for clean or tightly sealed media.3. Electric Drive and Intelligent Control: Equipped with an integrated intelligent electric actuator that can receive control signals such as 4-20mA, enabling remote control, precise proportional adjustment, or switch operation. The actuator usually integrates overload protection, stroke control, and fieldbus interface, making it easy to connect to DCS/PLC systems.4. Excellent flow and self-cleaning performance: When the valve is fully opened, the hemispherical valve core completely separates from the flow channel, forming a straight flow channel with extremely low flow resistance. During the opening and closing process, the scraping effect of the valve core edge can effectively remove the attachments on the sealing surface and has a certain self-cleaning ability.5. High reliability and safety: The upper structure adopts a pressure self sealing valve cover, and the higher the pressure, the more reliable the sealing. Valves are usually specially designed for fire safety, anti-static, and other aspects. The main sealing components are modularized for quick replacement, ensuring long-term stable operation of the system.

OverviewPQ340H side mounted hemispherical valve is an eccentric hemispherical valve designed for lateral installation and maintenance, mainly used in metallurgy, coal, environmental water treatment, and slurry pipeline systems containing dust and particles. It adopts a unique eccentric ball and valve seat sealing design, which can effectively reduce friction and achieve tight shut-off during the opening and closing process. The side mounted structure of the valve allows the main internal components to be assembled and disassembled through lateral openings, facilitating online inspection and replacement of valve seats and seals, significantly improving maintenance efficiency and system adaptability. It is a durable choice for handling harsh media and frequent operating conditions.PQ340H Side-entry Hemispherical Valve Product DiagramFeature1. Side mounted maintenance structure: There is a maintenance port on the side of the valve body, which allows for direct maintenance or replacement of the valve seat, stem, and seals without the need to disassemble the valve from the pipeline as a whole, saving maintenance time and costs. 2. Eccentric sealing design: The sphere adopts an eccentric structure, which has no contact friction with the valve seat during opening and closing. When closing, it relies on eccentric compression to achieve tight sealing, combining the advantages of long service life and low operating torque.3. Wear resistant and corrosion-resistant valve seat: The valve seat is often made of metal hard seal or composite material, and the surface can be welded with wear-resistant alloy, especially suitable for slurry media containing solid particles and ash, with strong resistance to erosion and corrosion.4. Bidirectional flow capability: The valve structure is symmetrical, supporting bidirectional flow and sealing of the medium, and the installation direction is not restricted, improving the flexibility of pipeline design.5. Worm gear drive operation: Equipped with a standard worm gear transmission mechanism, it is easy to open and close, has good self-locking performance, and can be extended to adapt to electric, pneumatic and other actuators to meet the needs of automation control.6. Compact and high-strength valve body: The valve body is made of high-quality cast steel or welded steel plates, with a sturdy and compact structure, smooth channels, and low resistance, suitable for industrial environments with medium and high pressure and frequent opening and closing.

OverviewThe PQ940F electric eccentric hemispherical valve utilizes motor-driven operation, with precision actuation achieved through a speed reduction mechanism. This innovative design combines the automation benefits of electric actuators with the wear-resistant sealing properties of eccentric hemispherical valves, delivering remote control capabilities, rapid response, and high sealing reliability. It is particularly suitable for pipeline systems requiring frequent regulation or remote automation in power generation, petrochemical processing, and water treatment applications, especially in harsh environments with high wear and solid particle-containing media. PQ940F Electric Eccentric Hemispherical Valve Product Diagram Feature1. Electric drive intelligent control: Featuring integrated multi-axis electric actuators, it supports remote, local, and program-controlled operation. The system receives switch signals or 4-20mA analog signals for precise regulation, delivering high automation.2. Zero-friction seal with eccentric structure: The eccentric valve stem engages with the hemispherical valve disc, ensuring frictionless disengagement and compression during operation. This design significantly reduces wear and maintains long-term reliable sealing.3. The wear-resistant and hard sealing valve has strong adaptability: the valve disc and seat are made of hard alloy or surface strengthened, which is resistant to erosion and corrosion, suitable for high temperature, high pressure and harsh media containing particles and slurry.4. Excellent flow performance: When fully open, the flow channel is nearly identical to the pipe's inner diameter, resulting in minimal flow resistance and low diameter loss, making it resistant to clogging. This makes it particularly suitable for slurry, powder, and other easily sedimented media.5. Compact structure with easy maintenance: The integrated actuator-valve design minimizes installation space requirements. Some configurations support top-mounted maintenance, allowing replacement of internal seals without valve disassembly, thereby reducing maintenance costs.

OverviewThe PQ640H pneumatic eccentric hemispherical valve is a valve actuated by a pneumatic actuator. It utilizes compressed air to drive the actuator mechanism, combined with an eccentric crankshaft design on the valve stem, enabling rapid and stable valve flap operation and regulation. Featuring a metal hard-seal structure, this valve offers excellent wear resistance, high-temperature tolerance, and automated control capabilities. Widely applicable in demanding industrial environments such as petroleum, chemical, metallurgy, and environmental protection sectors where frequent opening/closing or remote automated control is required, it serves as a reliable device for efficient pipeline fluid cutoff and process automation. PQ640H Pneumatic Eccentric Hemispherical Valve Product DiagramFeature1. Pneumatic actuators deliver rapid and reliable performance: Featuring piston or rack-and-pinion mechanisms, they provide swift response with minimal on/off time, support remote and automated control, and can be integrated with positioners for precise proportional regulation.2. Excentric metal hard seal: The valve disc and seat are made of hard alloy or super-hard material through overlay welding, combined with the motion of eccentric crankshaft to achieve frictionless opening/closing and zero leakage sealing, with excellent erosion resistance, high-temperature and high-pressure resistance.3. Bidirectional sealing and long service life: The valve is designed for bidirectional sealing, with minimal wear on the sealing pair during operation, ensuring extended service life. It is particularly suitable for harsh media containing particles or slurries.4. Low flow resistance and anti-clogging: When fully open, the valve body channel is nearly identical to the pipeline inner diameter, ensuring strong flow capacity, minimal pressure loss, and preventing medium deposition or blockage.5. Compact and easy-to-integrate design: The integrated actuator-valve assembly ensures convenient installation, supports multiple control signals and accessory expansion, facilitates integration into automation systems, and simplifies maintenance.

OverviewThe PQ340Y turbine-driven eccentric hemispherical valve features a worm gear-driven eccentric hemispherical design with a two-piece cast valve body, delivering both fluid control and high sealing reliability. Its turbine-driven mechanism ensures smooth valve disc operation, with a nominal pressure exceeding PN40. The metal hard-seal structure is specifically engineered for high-temperature, high-pressure, and particulate media applications, making it a preferred solution for demanding pipelines in power, steel, and chemical industries. This valve excels in efficient shut-off and reliable control performance.PQ340Y Turbine Eccentric Hemispherical Valve Product Diagram Feature1. The turbine drive system is stable and efficient, featuring a worm gear reduction mechanism that ensures smooth transmission, high output torque, effortless operation, and self-locking capability, enabling precise start-stop control and position retention.2. Metal hard-sealed high-pressure and high-temperature: The valve disc and seat are welded with cemented carbide or other wear-resistant materials, forming a rigid metal sealing pair that is resistant to erosion and high temperatures, suitable for high-pressure differentials and high-temperature media.3. Excessive wear-free operation of eccentric structure: The eccentric crankshaft design enables the valve disc to disengage from the valve seat during opening/closing, achieving frictionless motion. This significantly reduces operating torque and sealing surface wear, thereby extending service life.4. The flow channel is straight and the diameter of the valve is almost the same as that of the pipeline, so the resistance of the medium is small and the impurities are not easy to accumulate. It is especially suitable for slurry and solid particles.5. Robust structure with easy maintenance: The valve body features a sturdy design with either top-mounted or side-mounted configurations, allowing internal components to be serviced or replaced in-line. This minimizes downtime and lowers overall maintenance costs.

OverviewThe PQ40F manual eccentric hemispherical valve is a uniquely designed shut-off valve featuring intuitive operation. By manually rotating the handle or handwheel, the valve stem drives the eccentric hemispherical core to rotate approximately 90 degrees, enabling rapid on/off control of pipeline media. Its core innovation lies in the "eccentric" design—where the valve stem axis is pre-aligned with a offset from the hemispherical sealing surface. This configuration allows the hemispherical core to fully disengage from the valve seat during opening, eliminating friction, while the eccentric offset creates a wedge effect during closing to ensure airtight sealing. Particularly suited for demanding industrial applications, this valve excels in reliably cutting off slurries or gases containing solid particles such as mineral slurry, coal powder, and ash residues in sectors including power generation, metallurgy, mining, and chemical processing. PQ40F Manual Eccentric Hemispherical Valve Product DiagramFeature1. Excentric self-tightening seal: The valve features a unique single or double eccentric design. During closure, the eccentric hemispherical valve core presses against the seat in the final rotation phase through mechanical leverage, creating a self-tightening seal that tightens progressively. The sealing force increases with rising medium pressure, ensuring reliable shut-off.2. Anti-wear and anti-scaling: When fully open, the hemispherical component completely disengages from the flow channel and retracts into the valve body, allowing direct medium flow without obstruction and preventing high-speed erosion of sealing surfaces. In closed position, its sharp edges scrape and remove sludge or deposits adhering to the valve seat, providing self-cleaning functionality that significantly extends service life in harsh media environments.3. Manual operation is lightweight and reliable: The eccentric principle ensures instant disengagement between the hemispherical valve and seat during operation, dramatically reducing torque. With a simple 90-degree rotation, manual operation feels effortless and enables rapid opening/closing, providing a straightforward, dependable, and cost-effective control solution for applications without power or air supply.4. Bidirectional sealing and flow characteristics: The meticulously designed sealing pair enables bidirectional sealing (both upstream and downstream), eliminating the need to consider the medium flow direction during installation. The straight-through flow channel achieves minimal flow resistance when fully open, functioning like a straight pipe to significantly reduce system pressure loss and deliver notable energy-saving benefits.5. Economical and easy maintenance: The main sealing components (e.g., valve seats) are designed as detachable modules. When wear occurs on the sealing surfaces due to prolonged use, performance can be restored through simple compensation mechanisms or valve seat replacements, eliminating the need for complete valve replacement and keeping maintenance costs low.