4WRZ10E50-7X/6EG24N9EK4/D3V

The 4WRZ10E50-7X/6EG24N9EK4/D3V proportional directional valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series. It directs and modulates hydraulic flow in automation systems that rely on precise electro-hydraulic actuation. The component is built for a nominal size of 10, giving it port dimensions matched to medium-capacity manifolds. Under a differential pressure of 10 bar, it delivers a nominal flow rate of 50 l/min, allowing steady supply to cylinders or motors. The main stage sustains working pressures up to 315 bar, and the external T port is also rated for 315 bar, so high-pressure return circuits can be accommodated. The Y drain port is limited to 30 bar to protect the pilot section. Electrical actuation is provided by a 24 V DC solenoid whose coil has a cold resistance of 4.8 Ω, which defines its current draw. Continuous energization is permitted because the assembly is specified for a 100 % duty cycle, while a maximum coil temperature of 150 °C sets the thermal operating ceiling. Including its size-10 subplate, the valve weighs 7.8 kg, which influences manifold support requirements.

Control accuracy is supported by a maximum hysteresis of 6 %, reducing flow deviation during spool repositioning. The pilot stage consumes 3.5 l/min when driven from 0 to 100 %, and the corresponding pilot oil volume change is 1.7 cm³, parameters that determine response time in closed-loop circuits. Mineral oil classified as HL or HLP is the intended hydraulic medium, ensuring compatibility with standard industrial fluids. To avoid silting and wear, the main flow path must meet ISO 4406 cleanliness class 20/18/15, while the pilot supply requires a cleaner level of 18/16/13. These contamination limits help maintain the small clearances critical to proportional control. All performance figures assume the fluid and internal passages remain within those cleanliness thresholds, preserving the specified hysteresis and dynamic behavior.