4WRZ25E220-7X/6EG24N9EK4/V

The 4WRZ25E220-7X/6EG24N9EK4/V proportional directional valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is used to regulate flow direction and speed in automated hydraulic circuits. A nominal flow of 220 l/min lets the unit handle medium-to-high volume actuators without excessive pressure loss, while a maximum operating pressure of 350 bar suits high-pressure systems common in industrial presses and mobile machinery. The mounting interface conforms to ISO 4401-08-07-0-94 so the valve can bolt directly to standard subplates, reducing manifold design work. A 24 V DC supply voltage aligns with typical control power rails, and a maximum coil current of 1.5 A defines the output that drive electronics must provide. Continuous duty at 100 % means the solenoid may stay energized indefinitely without scheduled cooling periods, and an IP65 protection rating guards internal parts against dust ingress and low-pressure water jets. The assembly weighs 18.2 kg, a consideration for manifold support brackets and service handling equipment.

Coil resistance is 4.8 Ω at 20 °C, giving engineers the baseline impedance for sizing amplifiers, and it rises to 7.2 Ω at peak operating temperature to limit current as the winding heats. A maximum coil temperature of 150 °C sets the upper limit for insulation classes and enclosure ventilation design. Electrical connection is achieved through a DIN EN 175301-803 plug, allowing rapid field replacement without rewiring. A concealed manual override identified by the N9 code lets technicians shift the spool mechanically during power loss while preventing accidental actuation during normal service. The cleanliness class of ISO 4406 20/18/15 establishes permissible contamination levels for the main stage, helping avoid abrasive wear and sticking. Pilot circuitry must keep drain pressure at port Y below 30 bar to ensure stable pilot flow, and external return pressure at port T is limited to 250 bar to protect the main spool exhaust path.