Bosch Rexroth | 4WRZ25E1-325-7X6EG24N9EK4D3M-674
4WRZ25E1-325-7X/6EG24N9EK4/D3M-674
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The 4WRZ25E1-325-7X/6EG24N9EK4/D3M-674 proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth. It modulates spool position to control actuator speed and direction in hydraulic automation circuits. The nominal size is 25, providing flow capacity suited for large mobile or industrial machinery. A nominal flow of 325 l/min at 10 bar differential permits rapid cylinder movement under moderate pressure drops. The valve mounts on subplates conforming to ISO 4401-08-07-0-94, allowing interchange with other size-25 components. Main ports withstand up to 350 bar operating pressure, enabling use in high-pressure power units. Pilot oil is supplied internally so no external feed line is required, while the pilot drain is routed externally through Port Y to prevent back pressure on the control stage. Port Y may see up to 30 bar, and the return line at Port T accommodates 250 bar when an external drain is used.
Electrical control is provided by a solenoid rated for 24 V DC, and the electronics draw a maximum current of 1.5 A to reach full spool displacement. Connection is made through a plug matching DIN EN 175301-803, and an installed cable socket raises the enclosure rating to IP65 to block dust ingress and water jets during operation. The valve is designed for mineral oil fluids of the HL or HLP classes, and it operates reliably with viscosities between 20 and 380 mm²/s so standard hydraulic oils can be used over their typical service life. Fluid temperature can range from –20 °C to +80 °C, which aligns with common reservoir conditions in mobile and stationary equipment. The assembly weighs 18.2 kg, a consideration for mounting brackets and service handling.
Technical Specifications
Electrical Connection
DIN EN 175301-803
Fluid Temperature Range
−20 to +80 °C
Hydraulic Fluid
Mineral Oil (HL, HLP)
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Mounting Interface
ISO 4401-08-07-0-94
Nominal Flow (10 Bar)
325 l/min
Nominal Size
25
Pilot Oil Drain
External (Port Y)
Pilot Oil Supply
Internal
Port Y Pressure
30 bar
Return Pressure Port T (ext Drain)
250 bar
Supply Voltage
24 V DC
Type Of Protection
IP65 (with cable socket)
Viscosity Range
20 to 380 mm²/s
Weight
18.2 kg
1620 Old Apex Road
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