Bosch Rexroth | 4WRZ10E85-7X6EG24N9EK4V
4WRZ10E85-7X/6EG24N9EK4/V
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The 4WRZ10E85-7X/6EG24N9EK4/V valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation. It meters oil flow and direction according to an electrical command. The unit is built in nominal size 10, and its subplate interface follows the ISO 4401-05-05-0-94 port pattern for straightforward mounting. A nominal flow of 85 l/min at a 10 bar pressure drop supports medium-capacity actuators, while a maximum operating pressure of 350 bar allows connection to high-pressure supply lines. Pilot control is handled through an internal supply with an external drain, and the pilot stage itself is size 6, which lowers pilot consumption. An FKM seal set resists common hydraulic fluids, and the electrical link is a DIN EN 175301-803 plug coded K4. The solenoid requires a 24 V DC supply to generate proportional spool movement.
The integrated amplifier draws up to 1.5 A, so drive electronics must be sized accordingly. Valve hysteresis remains at or below 6 %, enabling steady positioning when the command signal changes direction. Safe operation is maintained across fluid viscosities from 20 mm²/s to 380 mm²/s, which covers most mineral oils used in industrial power units. The permissible hydraulic fluid temperature spans −20 °C to +80 °C, allowing the valve to serve both mobile equipment and factory systems with moderate cooling. A concealed manual override designated N9 lets maintenance personnel shift the spool when power is absent without exposing moving parts. These characteristics combine to provide accurate flow control and reliable service in servo-quality circuits where proportional response, broad fluid compatibility, and compact installation are required.
Technical Specifications
Electrical Connection
DIN EN 175301-803 Plug (K4)
Hydraulic Fluid Temp Max
+80 °C
Hydraulic Fluid Temp Min
−20 °C
Hysteresis
≤ 6 %
Manual Override
Concealed (N9)
Max Current
1.5 A
Max Operating Pressure
350 bar
Nominal Flow
85 l/min (Δp=10 bar)
Nominal Size
10
Pilot Oil
Internal Supply, External Drain (E)
Pilot Valve Size
6
Port Pattern
ISO 4401-05-05-0-94
Seal Material
FKM (V)
Supply Voltage
24 V DC
Viscosity Max
380 mm²/s
Viscosity Min
20 mm²/s
1620 Old Apex Road
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