4WRZ32E520-7X/6EG24N9EK4/D3V

The 4WRZ32E520-7X/6EG24N9EK4/D3V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation where precise metering and switching are required. Its solenoids are designed for a supply voltage of 24 V DC, delivering stable magnetic force for controlled spool positioning. A 100 % duty cycle permits continuous energizing without forced cooling, while a maximum coil temperature of 150 °C defines the thermal ceiling before derating is needed. Electrical connection follows the DIN EN 175301-803 standard, so the valve mates with common industrial plug connectors. A concealed manual override labeled N9 lets technicians shift the spool mechanically during setup or in case of power loss. Hysteresis is limited to 6 % to minimize flow deviation between command and actual response. Internal pilot-oil supply, identified by the code E, feeds the pilot stage from system pressure and removes external lines. The main stage withstands operating pressures up to 350 bar for high-pressure circuits.

The valve delivers a nominal flow of 520 l/min at a 10 bar differential, enabling rapid movement of large cylinders and motors. Return pressure at port T may reach 150 bar, allowing use in systems with back-pressure accumulators. Cleanliness of the main stage must meet class 20/18/15 according to ISO 4406 to maintain accurate spool guidance and reduce wear. It is intended for mineral oil fluids conforming to HL or HLP grades of DIN 51524, ensuring compatible viscosity and lubrication. The porting pattern follows ISO 4401, so the unit mounts on standardized subplates and manifolds. With subplate mounting, the assembly weighs 42.2 kg, a consideration for lifting brackets and manifold support. FKM seals are fitted to tolerate elevated temperatures and synthetic additive packages. A built-in pressure-reducing valve, type ZDR 6 DP0-4X/40YM-W80, limits pilot pressure and keeps the control stage stable during dynamic load changes.