4WRZ16W8-150-7X/6EG24N9K4/M

The 4WRZ16W8-150-7X/6EG24N9K4/M proportional directional valve from Bosch Rexroth belongs to the WRZ Proportional Directional Valves series. It regulates hydraulic flow and direction in automation circuits. Valve size 16 defines port interface area supporting nominal flow of 150 l/min at a 10 bar differential, enabling medium-capacity actuator control. Pilot valve size 6 provides the control stage that shifts the main spool with reduced pilot flow. The unit fits manifolds machined to ISO 4401-07-06-0-94, so it can be installed on standard subplates. A main pressure rating of 350 bar allows it to operate in high-pressure systems without derating. Compatibility with HL and HLP fluids according to DIN 51524 supports use with common mineral-based hydraulic oils. The solenoid circuit is designed for a 24 V DC supply; with a coil resistance of 4.8 Ω at 20 °C, the current draw reaches up to 1.5 A, matching typical mobile and industrial power sources. A continuous duty cycle of 100 % permits the coil to stay energized indefinitely during closed-loop positioning tasks.

A concealed manual override lets maintenance personnel shift the spool mechanically when electrical control is unavailable, improving serviceability. The enclosure reaches protection class IP65, so dust ingress and water jets do not affect operation in sheltered outdoor systems. Electrical connection uses the DIN EN 175301-803 rectangular plug, which simplifies coil replacement, provides strain relief for the 24 V DC supply conductors, and supports quick swap in modular manifolds. NBR seals resist mineral oil and maintain leakage control across the rated pressure and temperature range. The coil windings tolerate temperatures up to 150 °C, so they withstand heat produced during continuous energization. Valve hysteresis is held to 6 % or less to keep the flow proportional to command signals throughout the stroke, maintaining positioning accuracy for cylinders and motors.