Bosch Rexroth | 4WRZ25W6-220-7X6EG24N9K4D3V
4WRZ25W6-220-7X/6EG24N9K4/D3V
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The 4WRZ25W6-220-7X/6EG24N9K4/D3V valve belongs to the WRZ Proportional Directional Valves series produced by Bosch Rexroth for controlling actuator speed and direction in hydraulic automation. It tolerates a main operating pressure of 350 bar, allowing use in high-pressure systems, while a nominal flow of 220 l/min at a 10 bar differential maintains volumetric capacity for large cylinders. The ISO 4401-08-07-0-94 porting pattern aligns with size-25 subplates to streamline mounting. To protect the precision spool edges, fluid cleanliness must meet ISO 4406 (c) 20/18/15. Maximum hysteresis is held to 6 %, keeping command response accurate in proportional control loops. A continuous 100 % duty cycle lets the solenoid remain energized without thermal cycling. The DIN EN 175301-803 connector standardizes wiring, and, with the mating plug installed, the enclosure achieves IP65 protection against dust and water.
The coil shows 4.8 Ω resistance at 20 °C, providing predictable current draw for drive electronics, and the control circuit must not exceed the 1.5 A maximum coil current. Coil insulation withstands temperatures up to 150 °C, allowing service in warm machine environments. Pilot regulation requires only 7 l/min of oil across the 0–100 % stroke range, which reduces pump load during fine positioning. Port T can accept return pressures up to 250 bar, so the valve functions in circuits with significant back-pressure, while port Y is rated for 30 bar to safely vent pilot flow. FKM seals resist heat and common hydraulic fluids, supporting long service intervals. The assembled valve weighs 18.2 kg, permitting manual installation on the corresponding subplate.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Coil Resistance (20 °c)
4.8 Ω
Duty Cycle
100 %
Electrical Connection
DIN EN 175301-803
Hysteresis (max)
6 %
Main Valve Max Operating Pressure
350 bar
Max Coil Current
1.5 A
Max Coil Temperature
150 °C
Max Return Pressure Port T (external)
250 bar
Nominal Flow (Δp=10 Bar)
220 l/min
Pilot Oil Flow (0–100%)
7 l/min
Port Y Max Pressure
30 bar
Porting Pattern
ISO 4401-08-07-0-94
Seal Material
FKM
Type Of Protection
IP65 (With Plug)
Weight (subplate, Size 25)
18.2 kg
1620 Old Apex Road
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