4WRZ25E1-220-7X/6EG24N9K4/V

The 4WRZ25E1-220-7X/6EG24N9K4/V is a proportional directional valve manufactured by Bosch Rexroth for the WRZ Proportional Directional Valves series and it meters flow in hydraulic automation systems where variable speed and position control are needed. A supply voltage of 24 V DC lets the solenoid tie into standard industrial power rails. Coil resistance is 4.8 Ω at 20 °C, which defines current draw and protects driver electronics. The solenoid accepts a maximum current of 1.5 A so it can reach full spool stroke without overloading common amplifiers. Continuous energization is possible because the duty cycle is rated at 100 %. The coil withstands temperatures up to 150 °C, allowing operation near hot manifolds. Electrical connection follows DIN EN 175301-803, so the valve mates with widely available rectangular connectors. A concealed manual override identified by code N9 lets technicians shift the spool during commissioning while preventing accidental actuation in service. A command value overlap of 15 % introduces a neutral deadband that stabilizes the actuator when control input is near zero.

The main stage tolerates operating pressures up to 350 bar, enabling use in high-pressure circuits such as presses or injection machines. Maximum flow capacity is 870 l/min to supply large cylinders without excessive pressure loss, while nominal flow of 220 l/min at a 10 bar differential allows predictable sizing for precise motion tasks. A size 6 pilot valve shifts the main spool, reducing actuation force and improving response time, and its 2.8 mm throttle orifice sets pilot flow to dampen oscillations. The porting pattern conforms to ISO 4401-08-07-0-94, simplifying manifold layout with standardized mounting holes. FKM seals resist common hydraulic oils and elevated temperatures, extending service life in demanding duty. The assembly weighs 18.2 kg, a value that influences manifold support design and handling procedures during installation.