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The 4WRZ25E1-325-7X/6EG24N9ETK4/M valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series and controls actuator motion in hydraulic automation loops. A 24 V DC supply drives the solenoid so that it can be powered directly from common machine control rails. When measured at 20 °C the coil resistance is 4.8 Ω, and it increases to 7.2 Ω at elevated temperature to moderate current as the winding heats. The allowable coil temperature reaches 150 °C, and the 100 % duty cycle confirms that continuous energization will not exceed this limit. Current draw is capped at 1.5 A, simplifying sizing of the output stage on the drive card. Wiring is completed through a DIN EN 175301-803 connector, and the housing carries an IP65 rating to block dust and low-pressure water during exposed installation.
The main stage accommodates up to 870 l/min so large flow demands can be met, while a nominal value of 325 l/min at a 10 bar differential supports finer proportional control. Service ports tolerate 350 bar, giving compatibility with high-pressure power units, and port T can return oil at up to 30 bar without excess leakage. A pilot oil flow of 7 l/min and a pilot chamber volume of 10 cm³ deliver a fast spool transition from 0 to 100 % command. A concealed manual override permits mechanical actuation when the control signal is absent, and the body weight of 18.2 kg must be considered when selecting manifold or sub-plate mounting hardware.
Coil Resistance (20 °c)
4.8 Ω
Coil Resistance (max Hot)
7.2 Ω
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Main Valve Flow Capacity
870 l/min
Manual Override
Concealed
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Max Return Pressure (port T)
30 bar
Nominal Flow (Δp=10 Bar)
325 l/min
Pilot Oil Flow (step 0-100%)
7 l/min
Pilot Oil Volume (0-100%)
10 cm3
Protection Rating
IP65
Supply Voltage
24 V DC
Weight
18.2 kg
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