ZJHX  pneumatic diaphragm three-way diverging control valve is an industrial automation control valve consisting of a multi-spring pneumatic diaphragm actuator and a three-way diverging globe-style valve body. By receiving pneumatic signals from the control system (or standard signals converted via a positioner), the valve utilizes the thrust generated in the diaphragm chamber to drive the valve stem, moving the diverging plug accurately between two seats. Its unique one-inlet and two-outlet structural design is specifically used to distribute a single inlet fluid stream into two outlet paths in a set proportion or to divert fluid into a bypass system. Compared to electric control valves, the ZJHX model features sensitive action and rapid response, making it better suited for high-frequency regulation and environments with extreme safety requirements. In heat exchanger bypass control and industrial proportional distribution systems, a single pneumatic three-way diverging valve can effectively replace two coordinated single-seated control valves, significantly simplifying the process pipeline configuration and reducing potential leakage points.

Product Image of ZJHX Pneumatic Diaphragm Three-way Diverging Control Valve

1.Precise diverging adjustment logic:The valve body features one inlet (Port C) and two outlets (Ports A and B). Through the displacement of the valve plug, the flow area of the two outlets is adjusted synchronously to achieve precise proportional distribution of flow with excellent linearity.
2.Pipeline layout optimization:The integrated three-way structure reduces pipeline welding points and elbows. A single ZJHX valve performs the work of two single-seated valves, lowering system complexity and equipment investment costs.
3.Efficient pneumatic diaphragm drive:Equipped with a multi-spring pneumatic diaphragm actuator, the structure is lightweight yet provides large output force. It is more sensitive than electric drives, allowing for real-time regulation following control signal changes.
4.Dynamic operational stability:Targeting the turbulent characteristics generated in diverging conditions, the valve plug utilizes an enhanced guiding structure and a flow path optimized via fluid dynamics to suppress mechanical vibration and noise.
5.Linear proportional characteristics:The valve plug profile is precision-machined to ensure the sum of the two outlet flows remains stable during adjustment, facilitating parameter tuning in closed-loop control systems.
6.Intrinsic safety and fail-safe function:Pneumatic systems possess natural explosion-proof advantages. It supports fail-safe modes:upon air supply failure, the valve automatically resets to a preset safety position via built-in spring pressure.
7.Material and environmental adaptability:Valve body materials include grey cast iron, cast steel, and stainless steel. Internal parts can be hardened to handle hot water, thermal oil, and general corrosive media.
8.Modular maintenance advantages:The modular internal component design allows for the inspection and replacement of seals or valve plugs from the top without dismantling the entire valve body, greatly shortening maintenance downtime.

Structural Drawing of ZJHX Pneumatic Diaphragm Three-way Diverging 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)H1 in this table is based on PN16.(2)The height for models equipped with a handwheel mechanism should be increased by:150mm(DN20-50), 180mm(DN65-100), 250mm(DN125-200), 280mm(DN250-300).

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!