ZJHP compact pneumatic diaphragm single-seated regulating valve is an industrial automation control unit composed of a high-performance multi-spring pneumatic diaphragm actuator and a compact streamlined single-seated valve body. Equipped with an electro-pneumatic valve positioner or an intelligent positioner, the valve can receive 4-20mA DC standard analog signals from DCS or PLC systems. It utilizes compressed air as a power source to achieve precise control of process parameters. The actuator features a multi-spring design that accurately converts air pressure signals into valve stem thrust, driving the single-seated globe-style valve plug in a linear reciprocating motion within the valve body. Due to the single-seated sealing structure and precision-machined internal components, this series of valves features minimal leakage, tight shut-off performance, high adjustment precision, small size, and light weight. With its compact structure and low flow resistance, it is widely used in automation control systems requiring strict shut-off and precise regulation in process industries such as petroleum, chemicals, light industry, pharmaceuticals, and HVAC, serving as efficient and reliable execution equipment for modern industrial fluid control.

Product Image: ZJHP Compact Pneumatic Diaphragm Single-seated Regulating Valve

1.Efficient multi-spring pneumatic drive:Equipped with a compact multi-spring pneumatic diaphragm actuator, the overall height and weight are significantly reduced. Combined with an electro-pneumatic or intelligent positioner, it can accurately receive 4-20mA signals to achieve extremely high linearity and repeatable positioning accuracy.
2.Excellent shut-off sealing performance:Utilizing a single-seated sealing structure, the valve plug and seat sealing surfaces undergo high-precision grinding. The leakage rate is extremely low, easily reaching ANSI Class IV or VI (bubble-tight) sealing standards, making it the preferred execution unit for tight shut-off conditions.
3.Streamlined low-flow resistance path:The internal valve body adopts an S-shaped streamlined equal cross-section flow path design with a smooth internal cavity. While ensuring a large flow coefficient (Kv value), it effectively reduces pressure loss and disturbance as the medium passes through, ensuring smoother operation.
4.Precision top-guiding system:Features a robust top-guided structure with sufficient guiding area and accurate positioning. The valve stem maintains excellent concentricity throughout the entire stroke, effectively suppressing mechanical vibration caused by high-speed medium erosion and significantly extending packing seal life.
5.Lightweight compact design:Compared to traditional pneumatic control valves, the compact structure reduces volume by approximately 30% and weight by approximately 30%. This design not only saves installation space but also significantly lightens the pipeline load and reduces the strength requirements for supports.
6.Intrinsic safety and fail-safe reset:The adjustment process requires no electrical signals to enter hazardous areas (mechanical action), providing inherent explosion-proof safety. Based on process safety requirements, "air-to-close" or "air-to-open" configurations can be selected to automatically reset to a safety position upon power air source failure.
7.Wide material adaptability:Valve bodies are available in materials such as cast steel (WCB) and stainless steel (CF8/CF8M/CF3M). Internal parts can be customized with hardening, Stellite overlay, or PTFE lining based on actual conditions to handle high temperatures, low temperatures, and various corrosive chemical media.
8.Convenient modular maintenance:The overall structure is refined with high component interchangeability. Adopting a top-entry assembly and disassembly structure, online inspection and replacement of the valve plug and seat can be performed by vertically extracting the actuator without removing the valve from the pipeline, significantly shortening maintenance cycles.