4WRZ10W6-85-7X/6EG24N9K4/V

The 4WRZ10W6-85-7X/6EG24N9K4/V proportional directional valve is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series. It meters hydraulic flow in closed-loop automation circuits where gradual movement and repeatable positioning are required. The valve is built in size 10, matching subplate passages meant for medium-capacity actuators. A mounting interface defined by ISO 4401-05-05-0-94 lets the unit bolt directly onto standardized manifolds without adaptors. At a differential pressure of 10 bar it delivers a nominal flow of 85 l/min, supplying cylinders or motors that need steady volume. The main stage tolerates operating pressures up to 315 bar so it can work on high-pressure systems found in presses or injection machinery. Electrical actuation relies on a 24 V DC supply routed through a DIN EN 175301-803 connector, allowing quick coil replacement during service. A concealed manual override permits local spool shifting for setup while preventing accidental operation in the field. The enclosure meets IP65, protecting the coil and electronics against dust and low-pressure water jets.

The valve uses an external pilot oil supply to keep command pressure stable regardless of load changes, and an external pilot oil drain returns control fluid to tank without backpressure that could disturb the spool position. It is intended for mineral-oil media conforming to DIN 51524 HL or HLP, supporting common industrial fluids. The design accepts viscosities between 20 and 380 mm²/s so it remains responsive across normal temperature swings. Permitted fluid temperature ranges from ‑20 °C to +80 °C, allowing cold-start operation and sustained duty in warm reservoirs. To avoid wear of the precision edges, the hydraulic fluid must satisfy a cleanliness class of 20/18/15 per ISO 4406. Static and dynamic spool deviation is limited, with hysteresis not exceeding 6 %, which keeps commanded flow proportional to input current. The assembly weighs 7.8 kg, making it light enough for manifold mounting without additional support yet robust for continuous industrial service.