Bosch Rexroth | 4WRZ25W8-325-7X6EG24N9ETK4D3V
4WRZ25W8-325-7X/6EG24N9ETK4/D3V
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The 4WRZ25W8-325-7X/6EG24N9ETK4/D3V proportional directional valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is used to control flow and direction in hydraulic automation circuits. It is supplied in nominal size 25, providing an envelope compatible with large subplate patterns, while its nominal flow reaches 325 l/min at a differential pressure of 10 bar to support high-capacity actuators. The main stage tolerates operating pressures up to 350 bar, making it suitable for heavy-duty systems. A pilot valve of size 6 guides the main spool, and both pilot supply and drain are routed internally, eliminating external lines. Pilot damping is set by a 2.8 mm throttle insert orifice, ensuring stable proportional response. Installation aligns with porting pattern ISO 4401-08-07-0-94, enabling direct mounting on standard subplates.
The electrical section is powered by a 24 V DC supply and the solenoid draws a maximum of 1.5 A during modulation. A cold coil resistance of 4.8 Ω at 20 °C matches this current range, and a 100 % duty cycle allows continuous operation without thermal pauses. Wiring is completed through a DIN EN 175301-803 connector, and the housing achieves an IP65 ingress protection rating for use in wash-down areas. A concealed manual override lets maintenance personnel shift the spool locally when the control signal is absent. FKM seals contain hydraulic fluid and resist common oils, while the assembled valve and subplate weigh 18.2 kg, a consideration for lifting and support hardware.
Technical Specifications
Coil Resistance (cold, 20 °c)
4.8 Ω
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Ingress Protection
IP65
Manual Override
Concealed (N9)
Max Operating Pressure (main)
350 bar
Max Solenoid Current
1.5 A
Nominal Flow @ Δp=10 Bar
325 l/min
Nominal Size
25
Pilot Oil Supply/drain
Internal (ET)
Pilot Valve Size
6 (6E)
Porting Pattern
ISO 4401-08-07-0-94
Seal Material
FKM (V)
Supply Voltage
24 V DC
Throttle Insert Orifice
2.8 mm
Weight (subplate)
18.2 kg
1620 Old Apex Road
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