Bosch Rexroth | 4WRZE25W8-220-7X6EG24N9ETK31A1D3M
4WRZE25W8-220-7X/6EG24N9ETK31/A1D3M
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The 4WRZE25W8-220-7X/6EG24N9ETK31/A1D3M proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth for hydraulic automation tasks where electronic control of flow direction is required. Its spool type is W8, which defines the metering notches that create progressive flow characteristics. A command input of ±10 V lets the pilot electronics accept standard analog signals from motion controllers. The pilot oil is supplied internally, and the pilot oil also drains internally, so no external pilot lines are needed. Pilot valve size 6 keeps the control section compact while providing adequate pilot flow for rapid actuation. The solenoids are energized by a 24 V DC supply voltage, linking the unit to common machine power rails. Electrical connection is through a DIN EN 175201-804 plug, facilitating quick wiring and service. The valve withstands a maximum operating pressure of 350 bar, permitting use in high-pressure circuits.
At a differential pressure of 10 bar the main stage provides a nominal flow of 220 l/min, delivering consistent actuator speed during normal operation. When fully opened it can pass up to 870 l/min, giving additional capacity for peak flow demands. Ports A, B, and T have a diameter of 25 mm, while port P measures 24 mm, matching typical manifold passage sizes for balanced flow. The mounting interface follows ISO 4401-08-07-0-94, so the valve fits directly onto standardized subplates. An integrated pressure reducing valve type ZDR 6 DP0-4X/40YM-W80 limits pilot pressure to a stable level to protect the control stage. NBR seals are installed to maintain leakage integrity with mineral-oil hydraulics. The complete assembly weighs 18.4 kg, a factor to consider when designing the supporting structure.
Technical Specifications
Command Input
±10 V
Electrical Connection
DIN EN 175201-804
Max Main Valve Flow
870 l/min
Max Operating Pressure
350 bar
Nominal Flow (Δp=10 Bar)
220 l/min
Pilot Oil Drain
Internal
Pilot Oil Supply
Internal
Pilot Valve Size
6
Port A/b/t Diameter
25 mm
Port P Diameter
24 mm
Porting Pattern
ISO 4401-08-07-0-94
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Seal Material
NBR
Spool Type
W8
Supply Voltage
24 V DC
Weight
18.4 kg
1620 Old Apex Road
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