ChangJia Factory Price Hydraulic Solenoid Valve Manufacturer

Product Overview

- ChangJia Factory Price Hydraulic Solenoid Valve is a 4-way proportional pilot-and-direction valve family (models 4WRZ / 4WRH) designed for subplate mounting.

- It combines pilot and main stages with proportional solenoid actuation to control both flow rate and flow direction of hydraulic fluid, returning to neutral by spring centering when de-energized.

- Available in sizes (nominal) 10, 16, 25 and 32 with main-valve flow capacity up to 1600 L/min and maximum main pressures to 31.5–35 MPa.

Product Features

- Proportional pilot (WRZ) and directional (WRH) valve design for smooth, variable control of spool position and flow.

- Spring-centered spool with no spool drift, low pressure drop across control lands, and throttling grooves that open progressively with current.

- Compatible porting pattern to DIN 24340 form A / ISO 4401 / CETOP-RP121H; supports internal or external pilot supply and has an emergency hand operator.

- Electrical: DC solenoid drive (nominal 0.8 A), IP65 protection, continuous duty, associated amplifiers available (VT-3000S30 / VT-3006S30).

Product Value

- Cost-effective, factory-priced solution that integrates valve hydraulics and electronic proportional control from a single source.

- Delivers precise, repeatable flow and directional control (repeatability ~3%, low hysteresis) for improved process accuracy and equipment efficiency.

- Broad hydraulic and fluid compatibility (mineral oil or phosphate ester, viscosity 2.8–380 mm²/s, temperature -20 to +70 °C) supports wide application flexibility, reducing system design complexity and spare-part variety.

Product Advantages

- Competitive pricing from in-house manufacturing and modern production capabilities, enabling fast, flexible order processing.

- Robust performance: high flow capacity, high working pressures, low sensitivity to contamination (

- Easy integration into standard hydraulic manifolds/subplates, available in multiple sizes and with options for internal/external pilot, plus an emergency manual override for safety/maintenance.

- Supplied with matched electronic amplifiers and proven solenoid control for stable proportional response.

Application Scenarios

- Industrial hydraulic systems requiring proportional control: presses, injection-molding machines, machine tools, hydraulic test stands.

- Mobile and construction equipment where precise flow and directional control improves actuation (e.g., cranes, excavators, lifting systems).

- OEM hydraulic packages, material handling, marine and mining equipment, and process automation where high flow rates and high pressures are required.

- Repair shops and aftermarket customers seeking economical replacement valves compatible with DIN/ISO/CETOP mounting standards.