Bosch Rexroth | 4WRZ25W9-325-7X6EG24N9EK4D3M-674
4WRZ25W9-325-7X/6EG24N9EK4/D3M-674
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The 4WRZ25W9-325-7X/6EG24N9EK4/D3M-674 proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation tasks. The solenoid coil presents a resistance of 4.8 Ohm at 20 °C, establishing its current demand at rated voltage, and it is built for DC operation to maintain consistent magnet force. A maximum current of 1.5 A drives the spool to full stroke, while a 100 % duty cycle allows uninterrupted service without thermal cycling. Coil insulation is protected by a 150 °C temperature limit, preventing damage during extended operation. Electrical hookup uses a DIN EN 175301-803 connector, giving installers a familiar interface. The enclosure attains IP65, shielding internal parts from dust ingress and low-pressure water jets. When electrical power is unavailable, a concealed N9 manual override enables direct mechanical shifting of the spool.
The hydraulic end withstands 350 bar on the main ports, making the valve suitable for high-pressure circuits, and the external drain (port T) tolerates 250 bar to secure the return path. With a 10 bar pressure drop, the valve achieves a nominal flow of 325 L/min, supporting rapid actuator motion in large systems. Pilot oil is supplied internally and discharged externally, keeping case pressure low for stable spool control. Mounting follows the ISO 4401-08-07-0-94 porting pattern, ensuring interchangeability with standard subplates. An integrated D3 pressure reducing valve holds pilot pressure at a fixed level to maintain proportional accuracy. All seals are fabricated from NBR to resist common mineral oils and prevent leakage. The assembly weighs 18.2 kg in subplate configuration, which must be considered when selecting support hardware.
Technical Specifications
Coil Resistance (20°c)
4.8 Ohm
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Ingress Protection
IP65
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Max Port T Pressure (external Drain)
250 bar
Nominal Flow (Δp 10 Bar)
325 L/min
Pilot Oil Supply/drain
Internal Supply, External Drain
Porting Pattern
ISO 4401-08-07-0-94
Pressure Reducing Valve
D3
Seal Material
NBR
Type Of Voltage
DC
Weight (subplate Mounting)
18.2 kg
1620 Old Apex Road
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