Bosch Rexroth | 4WRZ10W6-85-7X6EG24N9ETK4M
4WRZ10W6-85-7X/6EG24N9ETK4/M
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The 4WRZ10W6-85-7X/6EG24N9ETK4/M valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series. It provides proportional control of spool position so that hydraulic actuators can be regulated smoothly in automated machinery. The coil resistance is 4.8 Ω at 20 °C, establishing the baseline electrical load seen by the drive electronics, while a hot resistance of 7.2 Ω limits current rise when the winding is heated. A maximum current of 1.5 A per solenoid defines the peak output that the amplifier must supply to reach full stroke. The design runs on direct current, and a 100 % duty cycle permits continuous energizing without cooling pauses. The winding can tolerate temperatures up to 150 °C, allowing operation near hot manifolds. Connection is made through a DIN EN 175301-803 plug, which simplifies wiring in standard valve stacks. An IP65 protection rating prevents dust ingress and water jets from affecting the electrical enclosure.
Flow and pressure limits match high-demand circuits: a nominal flow of 85 l/min at 10 bar Δp lets the valve feed medium-sized cylinders at useful speeds, and a main-stage operating pressure of 315 bar accommodates modern pump outputs. A 15 % command value overlap sets a defined neutral zone that minimizes unintended spool motion near zero signal. Pilot oil is supplied and drained internally using the ET arrangement, eliminating external lines and reducing leak points. The valve is intended for mineral oils classified as HL or HLP to DIN 51524, ensuring fluid compatibility in most industrial power units. The internal drain at port T can withstand 30 bar, and port Y shares the same 30 bar limit, so back-pressure effects are contained within specified bounds. Finally, a subplate-mounted weight of 7.8 kg influences manifold design and dictates handling requirements during installation.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Coil Resistance (max Hot)
7.2 Ω
Command Value Overlap
15%
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid
HL/HLP to DIN 51524
Max Coil Temperature
150 °C
Max Current (per Solenoid)
1.5 A
Nominal Flow (10 Bar Δp)
85 l/min
Operating Pressure (main Valve)
315 bar
Pilot Oil Supply/drain
Internal/Internal (ET)
Port T Pressure (internal Drain)
30 bar
Port Y Pressure
30 bar
Type Of Protection
IP65
Type Of Voltage
DC
Weight (subplate Mount)
7.8 kg
1620 Old Apex Road
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