Bosch Rexroth | 4WRZ10W8-50-7X6EG24N9ETK4V
4WRZ10W8-50-7X/6EG24N9ETK4/V
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The 4WRZ10W8-50-7X/6EG24N9ETK4/V valve is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series. It meters hydraulic flow and changes direction in automated circuits. A nominal size of 10 defines the mounting footprint, while the ISO 4401-05-05-0-94 porting pattern aligns it with standard subplates. Each service port has an 11 mm bore, giving sufficient passage area for the medium. A nominal flow rate of 50 l/min at a 10 bar pressure drop lets the unit supply actuators at moderate speeds. The W8 spool symbol sets the overlap and flow paths required for bidirectional control. A pilot valve size of 6 produces the proportional pilot pressure that shifts the main spool. Internal pilot oil supply and internal drain (ET) remove the need for external pilot lines and reduce leak points. The main stage tolerates operating pressures up to 315 bar, and a 24 V DC supply energizes the solenoids that position the spool.
A continuous coil duty cycle of 100 % allows the solenoid to remain energized without time limits, and a resistance of 4.8 ohm at 20 °C sets the steady-state current draw at the rated voltage. The winding insulation withstands temperatures up to 150 °C, preventing thermal damage during prolonged service. Wiring is completed through a DIN EN 175301-803 connector, providing a plug-in electrical interface that speeds installation. A concealed manual override labeled N9 lets maintenance staff shift the spool mechanically when power is unavailable while protecting it from accidental actuation. The internal drain path limits tank port pressure to 30 bar so return-line loading stays within design limits. The subplate-mounted valve weighs 7.8 kg, a factor to consider when arranging manifold supports and handling equipment.
Technical Specifications
Coil Duty Cycle
100%
Coil Resistance (20 °c)
4.8 ohm
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed (N9)
Mass (subplate Mounting)
7.8 kg
Max Coil Temperature
150 °C
Max Operating Pressure (main)
315 bar
Nominal Flow (10 Bar Δp)
50 l/min
Nominal Size
10
Pilot Oil Supply/drain
Internal/Internal (ET)
Pilot Valve Size
6
Port Bore (a/b/p/t)
11 mm
Porting Pattern
ISO 4401-05-05-0-94
Spool Symbol
W8
Supply Voltage
24 V DC
Tank Port Pressure (internal Drain)
30 bar
1620 Old Apex Road
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