4WS2EM10-5X/75B11T315K31DV

The 4WS2EM10-5X/75B11T315K31DV proportional servo valve is produced by Bosch Rexroth within the 4WS Servo Valves series. It meters hydraulic flow for closed-loop motion control in presses, injection machines, and other automation circuits. The nominal size of 10 defines the interface dimensions so it mounts directly on ISO-05 subplates without adapters. A rated flow of 75 l/min at a 70 bar differential allows the valve to supply medium-capacity actuators, while the ±10 % flow tolerance sets the expected variation in production units. Maximum operating pressure of 315 bar lets the valve handle high-pressure systems without structural deformation. Mineral oil of the HL or HLP type is specified as the working fluid to maintain seal compatibility and lubricity. The porting pattern follows ISO 4401-05-05-0-05 so manifold drilling matches international standards. Pilot oil is supplied externally, which ensures a stable pilot pressure independent of load changes, and the pilot oil returns internally so no extra drain line is required.

Each electromagnetic stage draws a rated coil current of 30 mA so the drive electronics can be designed with low-power outputs. A coil resistance of 85 Ω establishes the voltage needed to reach that current at room temperature. Coil inductance is 0.25 H when the coils are wired in parallel, limiting current ripple during fast command changes, and rises to 1.0 H in series connection to improve noise immunity in long-cable installations. Electrical connection uses an EN 175201-804 mating plug, which provides keyed contacts for dependable field wiring. The enclosure meets IP65, preventing dust ingress and water jets from affecting the coils and pilot stage. FKM seals resist mineral oil and high temperature, prolonging service life in demanding duty cycles. A weight of 3.56 kg permits straightforward handling during assembly while still delivering the mass needed to damp vibration in high-response applications.