Bosch Rexroth | 4WRZ10W8-50-7X6EG24N9EK4V
4WRZ10W8-50-7X/6EG24N9EK4/V
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The 4WRZ10W8-50-7X/6EG24N9EK4/V valve is manufactured by Bosch Rexroth as part of the WRZ Proportional Directional Valves series and is intended to regulate flow direction in hydraulic automation systems. It mounts on a size 10 interface that follows the ISO 4401-05-05-0-94 pattern, allowing direct replacement on standardized subplates. A nominal flow of 50 l/min at a 10 bar differential suits medium-capacity actuators, while the main stage tolerates 315 bar operating pressure for high-pressure circuits. Port T can also withstand 315 bar return pressure, supporting external drain lines that share elevated back-pressure loops. Internal pilot supply with external drain keeps pilot passages free of excess pressure, and the pilot section draws up to 3.5 l/min when the command signal moves from 0 to 100 percent. Port Y is limited to 30 bar to protect the pilot drain cavity. A concealed manual override permits local spool positioning when electrical power is absent, and the assembled unit weighs 7.8 kg on its size-10 subplate.
The proportional solenoid operates from a 24 V DC supply and can draw a peak current of 1.5 A, providing controlled spool displacement for precise metering. A cold coil resistance of 4.8 Ω defines the initial inrush and matches typical power amplifiers used in closed-loop control cards. Electrical termination is made with a DIN EN 175301-803 connector, simplifying field wiring and ensuring polarity-secure mating. The enclosure carries an IP65 rating, protecting the internal coil and electronics against water jets and airborne contaminants encountered near hydraulic machinery. FKM seals are installed to resist mineral oil and elevated temperatures, extending service life in continuous-duty applications. These electrical, sealing, and protection characteristics complement the hydraulic data above to give a balanced valve design suitable for demanding mobile or industrial hydraulic systems.
Technical Specifications
Coil Resistance (cold, 20°c)
4.8 Ω
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Operating Pressure (main Valve)
315 bar
Nominal Flow (Δp=10 Bar)
50 l/min
Pilot Oil Flow (step 0–100%)
3.5 l/min
Pilot Oil Supply
Internal Supply, External Drain
Port Y Pressure (max)
30 bar
Porting Pattern
ISO 4401-05-05-0-94
Protection Class
IP65
Return Pressure Port T (ext. Drain)
315 bar
Seals
FKM
Size
10
Solenoid Max Current
1.5 A
Supply Voltage
24 V DC
Weight (subplate, Size 10)
7.8 kg
1620 Old Apex Road
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