Bosch Rexroth | 4WRZ25W8-220-7X6EG24N9EK4D3M
4WRZ25W8-220-7X/6EG24N9EK4/D3M
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The 4WRZ25W8-220-7X/6EG24N9EK4/D3M proportional directional valve is manufactured by Bosch Rexroth in the WRZ Proportional Directional Valves series. It meters hydraulic flow and directs actuator movement in automation circuits. The valve size is 25, giving adequate port area for machines that need medium to high flow. A mounting pattern compliant with ISO 4401-08-07-0-94 allows the body to bolt directly onto standardized subplates without adapter blocks. Under a 10 bar differential, the nominal flow reaches 220 l/min, and the main stage can pass up to 870 l/min to support rapid cylinder or motor speeds. The main ports tolerate operating pressures up to 350 bar, so the unit can be placed on high-pressure supply manifolds. Pilot oil is taken internally while the drain is routed externally; this arrangement simplifies piping yet prevents pilot line back-pressure from influencing spool stability.
The solenoid assembly relies on DC voltage, and the coil shows a resistance of 4.8 Ω at 20 °C, which limits steady-state current. During modulation the current may rise to 1.5 A, and a 100 % duty cycle lets the coil remain energized continuously. Maximum coil temperature is rated at 150 °C, ensuring insulation integrity during prolonged throttle periods. Electrical power is fed through a plug conforming to DIN EN 175301-803, and a concealed manual override permits spool shifting during commissioning without disturbing the enclosure seal. The housing carries an IP65 protection rating that blocks dust ingress and water jets in typical factory environments. Overall mass is 18.2 kg, so sturdy mounting brackets are recommended to support the valve.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803 Plug
Manual Override
Concealed
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Main Valve Flow
870 l/min
Max Operating Pressure (main)
350 bar
Mounting Pattern
ISO 4401-08-07-0-94
Nominal Flow (10 Bar Δp)
220 l/min
Pilot Oil Drain
External
Pilot Oil Supply
Internal
Type Of Protection
IP65
Type Of Voltage
DC
Valve Size
25
Weight
18.2 kg
1620 Old Apex Road
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