Bosch Rexroth | 4WRZ25E325-7X6EG24N9ETK4D3M
4WRZ25E325-7X/6EG24N9ETK4/D3M
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The 4WRZ25E325-7X/6EG24N9ETK4/D3M belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and regulates both flow and direction in hydraulic automation circuits. A nominal flow of 325 l/min at a 10 bar pressure drop allows the valve to supply high-capacity actuators. The unit withstands a maximum operating pressure of 350 bar, so it can be placed in high-pressure manifold blocks. Return flow is limited by a 30 bar internal T-port rating, protecting the tank line from excessive back pressure. Port A, B, and T openings measure 25 mm, while the P-port is 24 mm, dimensions that match common subplate galleries. The porting pattern ISO 4401-08-07-0-94 aligns the valve with standardized mounting faces. Pilot oil is supplied and drained internally, eliminating external lines, and a pilot flow of 7 l/min ensures stable spool positioning. A 10 cm³ pilot oil volume for a 0–100 % step defines the control cavity displacement during full stroke.
The electromagnetic section is built for reliable duty: coil resistance is 4.8 Ω at 20 °C and rises to 7.2 Ω when hot, data that guides driver selection. A maximum coil current of 1.5 A provides the force needed for proportional spool movement without overheating. The winding can tolerate temperatures up to 150 °C, extending service life under continuous cycling. Electrical connection is made through a DIN EN 175301-803 plug, offering quick field replacement. An IP65 degree of protection seals the housing against dust and low-pressure water jets, so the valve can operate near spray zones. The assembly weighs 18.2 kg when mounted on a subplate, a factor considered when sizing support brackets and lifting equipment.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Coil Resistance (max Hot)
7.2 Ω
Degree Of Protection
IP65
Electrical Connection
DIN EN 175301-803
Max Coil Current
1.5 A
Max Coil Temperature
150 °C
Max Operating Pressure
350 bar
Max Return Pressure (port T, Internal)
30 bar
Nominal Flow @ 10 Bar Δp
325 l/min
Pilot Oil Flow (x/y)
7 l/min
Pilot Oil Supply/drain
Internal/Internal
Pilot Oil Volume (0–100% Step)
10 cm³
Port A/b/t Diameter
25 mm
Port P Diameter
24 mm
Porting Pattern
ISO 4401-08-07-0-94
Weight (subplate Mounting)
18.2 kg
1620 Old Apex Road
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