Bosch Rexroth | 4WRZ16W6-150-7X6EG24N9EK4V
4WRZ16W6-150-7X/6EG24N9EK4/V
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The 4WRZ16W6-150-7X/6EG24N9EK4/V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic motion control. It mounts on subplates that follow the ISO 4401-07-06-0-94 pattern so installation aligns with standard size 16 channels in power units. A nominal flow of 150 l/min at a 10 bar differential allows the valve to meter medium-sized actuator circuits without additional throttling. The main stage tolerates operating pressures up to 350 bar, supporting high force cylinders and motors. Internal pilot oil supply removes the need for an external feed line, while an external pilot drain returns leakage separately to tank to keep control pressure stable. The solenoid connects through a DIN EN 175301-803 plug, simplifying field wiring in industrial machines. An IP65 protection class shields the coil against dust and low-pressure water jets, and a total weight of 13.4 kg permits single-person handling during maintenance.
The electrical section draws a maximum of 1.5 A so standard 24 V controllers can drive the coil without overheating the supply. A cold resistance of 4.8 Ω at 20 °C defines the inrush current and supports accurate amplifier tuning. The winding endures temperatures up to 150 °C, allowing continuous duty in hot power packs. Total hysteresis remains at or below 6 %, which limits position error and ensures repeatable flow under closed-loop feedback. A concealed manual override identified as N9 lets technicians shift the spool during commissioning without exposing moving parts. Port Y withstands 30 bar, whereas the external tank port T may carry return pressures up to 250 bar, giving flexibility in remote reservoir layouts. FKM seals resist common hydraulic oils at elevated temperatures, maintaining tightness over long service intervals.
Technical Specifications
Electrical Connection
DIN EN 175301-803
Hysteresis
≤ 6%
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Max Pressure (port Y)
30 bar
Max Return Pressure (port T, Ext.)
250 bar
Mounting Interface
ISO 4401-07-06-0-94
Nominal Flow (Δp 10 Bar)
150 l/min
Pilot Oil Drain
External
Pilot Oil Supply
Internal
Protection Class
IP65
Seals
FKM
Solenoid Coil Resistance (20°c)
4.8 Ω
Weight
13.4 kg
1620 Old Apex Road
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