4WRZ16W6-150-7X/6EG24N9ETK4/V

The 4WRZ16W6-150-7X/6EG24N9ETK4/V valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and meters hydraulic flow and direction in automated circuits. Its porting pattern conforms to ISO 4401-07-06-0-94, allowing the component to bolt to standard size 07 subplates without adapter blocks. A nominal flow of 150 l/min at a 10 bar pressure drop defines the throughput available for cylinder or motor actuation. The main ports tolerate a maximum operating pressure of 350 bar, so the valve can be placed on high-pressure supply manifolds. Return flow to port T may reach 30 bar, preventing cavitation when internal drainage is used. Pilot supply and drain are routed internally, marked by the ET code, which simplifies plumbing and reduces external leak paths. The solenoid electronics require a 24 V DC supply, and a coil resistance of 4.8 Ω at 20 °C sets the steady-state current curve. A current limit of 1.5 A protects the winding and ensures proportional spool movement under full command.

The valve withstands demanding duty cycles because the coil is rated for temperatures up to 150 °C before insulation degradation occurs. An IP65 ingress protection rating keeps dust and low-pressure water jets away from internal parts, so the unit can be mounted outside a cabinet. Electrical hookup is through a DIN EN 175301-803 plug, providing a keyed connector that locks against vibration. A concealed N9 manual override lets maintenance staff shift the spool mechanically during commissioning or power loss without exposing the operator to moving parts. Control accuracy is influenced by a 15 % command value overlap that defines the neutral deadband, while hysteresis remains at or below 6 % to maintain repeatable flow for closed-loop systems. FKM seals resist mineral oils and elevated temperatures, extending service life with common hydraulic fluids. The subplate-mounted assembly weighs 13.4 kg, a value that installers must consider when selecting support brackets or when handling the valve during replacement.