Bosch Rexroth | 4WRZ16E150-7X6EG24K4V
4WRZ16E150-7X/6EG24K4/V
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The 4WRZ16E150-7X/6EG24K4/V valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series and is intended to regulate flow direction in hydraulic automation systems. It is energized by a 24 VDC solenoid, and the coil presents 4.8 ohms at 20 °C, establishing the initial current draw when the device is powered. During continuous service the winding can warm to 7.2 ohms, which naturally limits current as temperature rises, while a maximum coil current of 1.5 A keeps the conductor below its thermal limit. A 100 percent duty cycle allows the solenoid to remain energized without forced pauses, and insulation designed for 150 °C protects the winding from heat damage. Pilot oil is supplied externally, and the drain is routed externally to isolate the pilot circuit from main-line pressure and contaminants.
The valve withstands system pressures up to 350 bar, making it suitable for high-pressure actuator lines. The porting pattern follows ISO 4401-07-06-0-94 so the unit can drop onto standard subplates without extra machining. An IP65 enclosure shields the electrical section from dust ingress and low-pressure water jets encountered near production equipment. FKM seals contain the mineral oil grades HL and HLP specified for the hydraulic circuit and remain stable within a viscosity window of 20 to 380 mm²/s. Service temperatures from −20 °C to +80 °C permit installation in unconditioned environments, and a nominal flow of 150 l/min at a 10 bar pressure drop delivers predictable actuator speed when the spool is fully shifted.
Technical Specifications
Coil Resistance (20 °c)
4.8 ohm
Coil Resistance (max Hot)
7.2 ohm
Duty Cycle
100%
Fluid Temperature Range
-20 to +80 °C
Hydraulic Fluid
Mineral Oil (HL, HLP)
Max Coil Current
1.5 A
Max Coil Temperature
150 °C
Max Operating Pressure
350 bar
Nominal Flow (10 Bar Δp)
150 l/min
Pilot Oil Drain
External
Pilot Oil Supply
External
Porting Pattern
ISO 4401-07-06-0-94
Protection Rating
IP65
Seal Material
FKM
Supply Voltage
24 VDC
Viscosity Range
20 to 380 mm2/s
1620 Old Apex Road
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