4WRZ10E85-7X/6EG24N9K4/D3M

The 4WRZ10E85-7X/6EG24N9K4/D3M valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series for closed-loop hydraulic automation where directional control must be varied in real time. It operates on a 24 V DC supply so machine controllers can drive the solenoid directly from standard logic power rails. A maximum coil current of 1.5 A limits heat generation while still delivering the magnetic force needed for full spool travel. Coil resistance is specified at 4.8 Ω at 20 °C, giving designers the data required for driver sizing and fault detection. The electrical interface uses a DIN EN 175301-803 connector, allowing quick installation and replacement without special tools. Nominal flow reaches 85 l/min at a pressure drop of 10 bar, enabling medium-capacity actuators to move at practical speeds. Pilot oil flow of 3.5 l/min during a 0 to 100 % command step supplies the control stage with enough oil for fast response. Hysteresis remains at or below 6 %, so commanded spool positions translate into consistent flow rates over repeated cycles.

The main stage tolerates operating pressures up to 315 bar, matching typical high-pressure pump outputs found in industrial presses and molding machines. The same 315 bar limit applies to the external return port, assuring safe operation when the tank line is routed through back-pressure valves. When the return path is taken internally, permissible pressure falls to 30 bar, a value that protects the housing seals. Port Y for pilot drain is limited to 30 bar as well, preventing overload of the pilot spool drainage channel. Manifold attachment follows the ISO 4401-05-05-0-94 porting pattern so the valve aligns with standard subplates. An IP65 protection class keeps dust ingress and low-pressure water jets from reaching the coil and connector during wash-down maintenance. Fluid cleanliness must meet ISO 4406 code 20/18/15, a requirement that reduces silting and extends service life of the metering edges. Service personnel can handle the unit without lifting gear because it weighs 7.8 kg, which simplifies exchange during planned maintenance.