4WRZ25E325-7X/6EG24N9EK4/D3M

The 4WRZ25E325-7X/6EG24N9EK4/D3M valve is manufactured by Bosch Rexroth within the WRZ Proportional Directional Valves series. As a pilot-operated proportional directional design, it modulates spool position in response to electrical input to steer hydraulic flow in automated machinery. A nominal size of 25 defines the port section area and suits medium to high flow circuits. The unit passes a nominal flow of 325 l/min at a differential pressure of 10 bar, giving ample volume for large actuators. The main stage withstands operating pressures up to 350 bar so it fits high-pressure systems. A porting pattern in accordance with ISO 4401-08-07-0-94 allows direct mounting on standardized sub-plates. Pilot oil is taken internally and drained externally, simplifying supply plumbing while keeping pilot channels free of back-pressure. An integrated pressure reducing valve maintains a constant pilot pressure for stable control. NBR seals are fitted to provide reliable sealing performance in mineral oil service.

The coil assembly operates from a supply voltage of 24 V DC and is limited to a maximum current of 1.5 A to match common proportional amplifiers. A coil resistance of 4.8 Ω measured at 20 °C sets the electrical load seen by the driver electronics. Environmental durability is supported by an IP65 ingress protection rating, allowing the valve body to resist dust and water jets when correctly connected. The electrical interface uses a DIN EN 175301-803 plug so field wiring can be completed with industry-standard connectors. A concealed manual override lets technicians shift the spool during commissioning without exposing moving parts. Approved hydraulic fluid grades are HL or HLP according to DIN 51524, ensuring compatible viscosity and lubrication. Ambient operation between −20 °C and +70 °C covers most mobile and stationary installations. These electrical and environmental features combine to keep the proportional control stable under varied service conditions.