ZJHS compact pneumatic diaphragm angle single-seated control valve is a precision control unit consisting of a multi-spring pneumatic diaphragm actuator and a compact angle-style single-seated valve body. It is specifically designed for flow regulation of media with high pressure drops, high viscosity, or containing suspended particles. The angle-style body features a simple flow path with minimal resistance, effectively utilizing the erosion force of the medium for self-cleaning and preventing fluid accumulation in the cavity. Key internals such as the plug and seat can undergo hardening treatments like Stellite overlay, nitriding, or specialized spraying before or after machining to enhance erosion and wear resistance. The sealing structure offers options for PTFE soft seals or high-hardness metal-to-metal hard seals based on medium pressure and temperature, ensuring strict shut-off while providing excellent dynamic regulation stability. The ZJHS valve is typically installed at piping locations requiring a 90-degree change in fluid direction to precisely regulate physical parameters, ensuring the stable operation of industrial processes. It features a compact structure, light weight, sensitive response, and smooth flow, with a rated flow coefficient generally higher than standard single-seated valves. It is widely used in petroleum, chemical, power, and textile industries for automation systems requiring high precision and durability.

Product Image of ZJHS Compact Pneumatic Diaphragm Angle Single-seated Control Valve

1.Compact and lightweight design:Equipped with a multi-spring pneumatic diaphragm actuator, the overall height is significantly lower than traditional control valves, with a weight reduction of approximately 30%. This saves installation space and reduces pipeline load, making it suitable for compact layouts.
2.Superior angle flow path design:The valve body features a right-angle structure with a smooth flow path and no dead zones, resulting in an extremely low resistance coefficient. This design ensures direct flow and strong self-cleaning capabilities, effectively preventing medium accumulation and scaling, ideal for high-viscosity or particle-laden fluids.
3.Excellent shut-off sealing performance:Utilizing a single-seated sealing structure with precision-ground surfaces, the valve features minimal leakage. It easily meets ANSI Class IV or VI (bubble-tight) sealing standards, serving as the preferred unit for strict process isolation.
4.Stable and reliable top-guiding:The valve plug is supported by a robust top-guided structure with a large guiding area and uniform stress distribution. This maintains high concentricity and vibration resistance throughout the stroke, effectively suppressing mechanical noise and high-frequency whistling caused by fluid impact.
5.High-precision proportional regulation:The plug profile is precision-engineered based on fluid dynamics to provide linear or equal percentage flow characteristics. Paired with a smart positioner, it achieves high repeatability and sensitivity to ensure stable process control under dynamic conditions.
6.Intrinsically safe attributes:Driven by clean compressed air as the power source, it involves no electrical spark risks and possesses natural explosion-proof characteristics. Fail-safe positions (full open or full close) can be configured via built-in spring pressure to protect the system during air supply failure.
7.Erosion resistance and long service life:The body and internals are available in cast steel, stainless steel, and various special alloys. For high pressure drops or harsh media, the sealing surfaces can be hard-faced with Stellite, offering extreme hardness and corrosion resistance to significantly extend service life.
8.Convenient modular maintenance:The refined structure ensures high component interchangeability. Featuring a top-entry design, internal components can be inspected, cleaned, or replaced by vertically extracting the actuator without removing the entire valve from the pipeline, shortening maintenance cycles.

Structural Drawing of ZJHS Compact Pneumatic Diaphragm Angle Single-seated Control Valve

List of Component Names and Materials

Performance Specification Sheet

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

Outline dimension table(Unit: mm)

Note:(1)Height and weight for high-temperature, bellows, and cryogenic types in this table are based on PN16.(2)Height for models with a handwheel should be increased by 152mm (DN20-50), 182mm (DN65-100), 253mm (DN125-200).

Due to the rapid R&D iteration speed of valve products from China Kaivex Valve Group Co., Ltd., the above technical parameters and specification documents, including product overview, features, parts materials, outline dimension charts, CAD drawings, and product instruction manuals, are for your reference only. For actual applications, please contact our valve sales engineers to obtain the support you need for free. Thank you!