4WRZ25W6-325-7X/6EG24N9EK4/D3V

The 4WRZ25W6-325-7X/6EG24N9EK4/D3V valve is produced by Bosch Rexroth and belongs to the WRZ Proportional Directional Valves series. It meters flow and switches direction in hydraulic actuators where closed loop position or force control is required. A valve size of 25 provides passage dimensions matched to medium-to-high flow circuits, and a nominal flow of 325 l/min at a 10 bar pressure drop supports rapid cylinder or motor movement. The unit bolts to subplates that follow the ISO 4401-08-07-0-94 mounting pattern, simplifying integration with standard manifolds. High pressure passages are rated for 350 bar so the valve handles modern pump outlets without derating. Electrical actuation relies on a 24 V DC supply; within that range the coil draws up to 1.5 A, and a resistance of 4.8 Ω at 20 °C sets steady-state current. Connection is through a DIN EN 175301-803 plug which aligns with common cabinet wiring and seals against oil mist.

For continuous service the electromagnetic drive is specified for a 100 % duty cycle, allowing the spool to hold any commanded position without timed cooling breaks. An IP65 protection rating keeps dust and directed water jets away from internal windings during field installation. The coil insulation tolerates temperatures up to 150 °C, preventing thermal damage when the surrounding oil is hot. A concealed manual override lets maintenance staff shift the spool without energizing the solenoid while safeguarding it from accidental activation. Pilot control is provided by a 3DREP 6 valve, generating proportional pilot pressure that shifts the main stage smoothly, and a ZDR 6 DP0-4X/40YM-W80 pressure-reducing valve stabilizes the pilot supply under varying system loads. The external drain on port T can accept up to 250 bar, which protects the pilot stage when back pressure builds in the return line. Total mass is 18.2 kg, so lifting aids may be required during installation.