Bosch Rexroth | 4WRZ10W6-85-7X6EG24N9TK4M
4WRZ10W6-85-7X/6EG24N9TK4/M
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The 4WRZ10W6-85-7X/6EG24N9TK4/M valve belongs to the WRZ Proportional Directional Valves series and is produced by Bosch Rexroth for closed-loop hydraulic automation. It shifts spool position in response to a 24 V DC command, allowing proportional control of actuator speed and direction. A cold coil resistance of 4.8 Ω limits inrush current at 20 °C, while the resistance rises to 7.2 Ω at maximum temperature to prevent overheating. Continuous service is supported by a 100 % duty cycle, and the solenoid accepts up to 1.5 A so drive electronics can be sized accordingly. A maximum coil temperature of 150 °C defines the permissible thermal envelope during sustained operation. Electrical connection is made through a DIN EN 175301-803 plug, providing a sealed and keyed interface for field wiring. The valve mounts on a subplate, and its interface follows the ISO 4401-05-05-0-94 porting pattern, enabling quick replacement or circuit reconfiguration without pipework changes.
With a nominal size of 10, the valve fits NG10 cavities common to medium-flow manifolds. It delivers a nominal flow of 85 L/min at a 10 bar differential, allowing cylinders or motors to move smoothly under proportional control. The main stage tolerates system pressures up to 315 bar, so it can be installed in high-pressure circuits. External pilot supply with an internal drain arrangement stabilizes spool control while simplifying return plumbing. The internal drain path is rated for 30 bar at port T, maintaining reliability when back-pressure is present. Mineral-oil fluids of the HL or HLP classes are recommended to lubricate the sliding elements and preserve seal life. Total mass is 7.8 kg, which helps damp vibration when mounted on machinery.
Technical Specifications
Coil Resistance (cold, 20 °c)
4.8 Ω
Coil Resistance (hot, Max)
7.2 Ω
Connector Type
DIN EN 175301-803 Plug
Duty Cycle
100%
Hydraulic Fluid
Mineral Oil (HL, HLP)
Main Stage Max Pressure
315 bar
Max Coil Temperature
150 °C
Max Solenoid Current
1.5 A
Mounting Type
Subplate Mounting
Nominal Flow
85 l/min (∆p=10 bar)
Nominal Size
10 (NG10)
Pilot Supply/drain
External Supply, Internal Drain
Port T Max Pressure
30 bar (internal drain)
Porting Pattern
ISO 4401-05-05-0-94
Supply Voltage
24 V DC
Weight
7.8 kg
1620 Old Apex Road
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