4WRZE25W6-220-7X/6EG24N9ETK31/F1V

The 4WRZE25W6-220-7X/6EG24N9ETK31/F1V is a proportional directional valve manufactured by Bosch Rexroth for the WRZ Proportional Directional Valves series. It meters hydraulic flow and shifts direction in automation systems according to an electrical command output from a control loop. A valve size of 25 establishes passage areas suited for medium to high flow circuits, while a nominal flow of 220 l/min at a 10 bar differential lets cylinders or motors move quickly under moderate pressure loss. The assembly tolerates a maximum operating pressure of 350 bar so that it can be placed on high-pressure power units without derating. An ISO 4401-08-07-0-94 port pattern keeps the mounting interface consistent with standard subplates, and a subplate weight of 18.4 kg informs lifting and support requirements during service. The electronics accept a 24 V DC supply, and a 4–20 mA command interface converts controller output into spool position for proportional response. Electrical connection through a DIN EN 175201-804 plug speeds wiring and ensures polarity alignment.

The solenoid stage draws up to 2.5 A, a value that guides selection of the driver card and protects windings from overcurrent. Coil insulation survives 150 °C, allowing the unit to keep operating when ambient or oil temperatures rise during continuous duty. An IP65 protection rating seals the enclosure against dust and low-pressure water jets, so the valve can be mounted near splash zones on machinery. Pilot control is handled by a size 6 valve, and the pilot oil is supplied and drained internally which removes the need for external pilot lines. The tank port tolerates 30 bar internally, defining the highest permissible back pressure without affecting spool centering. Fluid cleanliness must reach ISO 4406 20/18/15 in the main stage to limit wear, while the pilot stage demands ISO 4406 18/16/13 to maintain precise positioning of the smaller spool. Together these parameters outline the electrical, thermal, and hydraulic limits that keep the valve accurate over long service periods.