Bosch Rexroth | 4WRZ16W8-150-7X6EG24N9EK4D3V
4WRZ16W8-150-7X/6EG24N9EK4/D3V
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The 4WRZ16W8-150-7X/6EG24N9EK4/D3V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth. It modulates hydraulic flow and direction in automation systems by adjusting spool position with an electrically controlled pilot stage. The pilot coil operates at 24 V DC and can run continuously at a 100 % duty cycle while drawing up to 1.5 A. Wiring is completed through a DIN EN 175301-803 connector, and a concealed N9 manual override allows local shifting when power is absent. The coil insulation withstands temperatures up to 150 °C, and an IP65 housing protects the unit against dust and water spray. The valve mounts on subplates using the ISO 4401-07-06-0-94 pattern, so it matches common manifolds. Internal pilot oil supply removes the need for an external feed line, reducing installation complexity.
The hydraulic stage is rated for 350 bar on the pressure and work ports, with the tank port permitted to 250 bar and the pilot drain port y limited to 30 bar. Under a 10 bar pressure drop the valve delivers a nominal flow of 150 l/min, supporting high-speed cylinder or motor circuits. Pilot oil is drained externally to prevent back pressure from affecting the pilot spool. A 2.0 mm throttle insert in the pilot valve smooths flow changes and improves stability. Pilot pressure is controlled by the integrated ZDR 6 DP0-4X/40YM-W80 pressure reducing valve, maintaining consistent actuation over varying load conditions. This pressure control works together with the internal pilot supply stated earlier to keep spool positioning accurate during continuous service.
Technical Specifications
Coil Voltage
24 V DC
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure
350 bar
Max Pilot Drain Pressure (y)
30 bar
Max Tank Port Pressure (t)
250 bar
Mounting Pattern
ISO 4401-07-06-0-94
Nominal Flow (Δp 10 Bar)
150 l/min
Pilot Oil Drain
External
Pilot Oil Supply
Internal
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Throttle Insert (pilot Valve)
Ø 2.0 mm
Type Of Protection
IP65
1620 Old Apex Road
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