Bosch Rexroth | 4WRZ25W8-220-7X6EG24N9ETK4M
4WRZ25W8-220-7X/6EG24N9ETK4/M
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The 4WRZ25W8-220-7X/6EG24N9ETK4/M proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth. It meters flow and directs pressurized fluid in hydraulic automation circuits where electrical control is required. The valve accepts a 24 V DC supply voltage so its solenoids can be driven directly from common industrial control outputs. A DIN EN 175301-803 connector provides the electrical interface, allowing fast field wiring. The unit handles mineral oil classified as HL or HLP, enabling compatibility with standard power packs. With a nominal flow of 220 l/min at a 10 bar pressure drop, it supports high-capacity actuators. The maximum operating pressure reaches 350 bar, permitting use in heavy-duty presses or motion axes. A concealed manual override lets maintenance staff shift the spool without energizing the solenoid when troubleshooting. Subplate installation follows the ISO 4401-08-07-0-94 pattern so the valve can replace similar sizes without manifold rework.
For pilot stages, the valve draws and drains pilot oil internally; the integrated supply path delivers 7 l/min when the control signal ranges from 0 to 100 percent, and the total pilot volume for a full stroke is 10 cm³, minimizing lag during rapid commands. Return line pressure at port T may rise to 30 bar without affecting function, broadening circuit design choices. Ports A, B, and T each measure 25 mm while port P measures 24 mm, maintaining balanced flow sections across the body. NBR seals keep leakage low with standard mineral oils. Overall weight in subplate mounting configuration is 18.2 kg, so a single technician can install the unit with standard lifting aids. Because the pilot passages are internal, external drain lines are unnecessary, which simplifies plumbing and reduces potential leak paths.
Technical Specifications
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid
Mineral Oil (HL, HLP)
Manual Override
Concealed
Max Operating Pressure
350 bar
Max Return Pressure T (internal)
30 bar
Mounting Pattern
ISO 4401-08-07-0-94
Nominal Flow (10 Bar Δp)
220 l/min
Pilot Oil Drain
Internal
Pilot Oil Flow (0–100%)
7 l/min
Pilot Oil Supply
Internal
Pilot Oil Volume (0–100%)
10 cm3
Port A/b/t Diameter
25 mm
Port P Diameter
24 mm
Seals
NBR
Supply Voltage
24 V DC
Weight (subplate Mounting)
18.2 kg
1620 Old Apex Road
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