4WRZE25W8-325-7X/6EG24N9ETK31/F1D3V

The 4WRZE25W8-325-7X/6EG24N9ETK31/F1D3V proportional directional valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series. It meters hydraulic flow and directs actuator movement in automated systems. The valve accepts a 24 VDC supply voltage so that standard control cabinets can energize the coils without auxiliary converters. A 4–20 mA command signal establishes the spool position, allowing PLC analog outputs to modulate flow in closed-loop circuits. With a nominal flow of 325 l/min at a 10 bar differential, the unit supports high-volume cylinders or motors. The main stage withstands operating pressures up to 350 bar, permitting use on high-pressure manifolds. Internal pilot oil supply and internal pilot oil drain simplify plumbing because no external lines are required. The porting pattern follows ISO 4401-08-07-0-94, making the unit interchangeable with common size 08 subplates. A concealed manual override lets maintenance staff shift the spool during commissioning without leaving an exposed pin. During startup, a 3 A power pulse current provides rapid magnet saturation to overcome static friction.

After the initial pulse, continuous current consumption is limited to 1.8 A, which reduces heat generation during long duty cycles. The electrical connection uses a DIN EN 175201-804 plug, enabling quick coil replacement with standardized field wiring. An IP65 protection class seals the housing against dust and water jets, so the valve can be mounted on machinery that is cleaned with pressurized wash-down. The coil insulation supports temperatures up to 150 °C, extending service life in hot manifolds or enclosed cabinets. Return flow limits are defined at 30 bar for port T when the drain is internal and 250 bar when the drain is external, guiding designers in selecting reservoir back-pressure settings. Total mass is 18.4 kg, which must be considered when specifying subplate torque and lifting equipment. These characteristics combine to deliver precise, repeatable flow control for hydraulic actuators across a broad range of industrial machinery.