Bosch Rexroth | 4WRH10W6-50-7XV
4WRH10W6-50-7X/V
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The 4WRH10W6-50-7X/V valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth. It regulates flow direction in hydraulic automation circuits by adjusting spool position in response to an electrical command. The unit is built in size 10 and matches the ISO 4401-05-05-0-94 mounting pattern, simplifying attachment to industry-standard subplates. A nominal flow of 50 l/min at a 10 bar differential allows the valve to serve medium-capacity actuators without excessive pressure loss. Main flow passages withstand up to 315 bar, and the return port is rated for the same pressure to maintain symmetrical stress on the housing. Pilot oil is supplied externally and drained externally, a layout that isolates control pressure from tank fluctuations. The pilot stage accepts a maximum of 25 bar, while the drain line must remain below 30 bar to keep response times consistent. For reliability, the main valve requires oil cleanliness that meets ISO 4406 20/18/15.
The valve works with mineral oil of the HL or HLP classifications, providing the lubricity needed for proportional control edges. It functions over a viscosity window from 20 mm²/s to 380 mm²/s, so both cold starts and high-temperature running can be accommodated without compromising metering accuracy. Fluid temperature may range from –20 °C to +80 °C, letting the device operate in unheated outdoor equipment as well as installations with elevated reservoir temperatures. FKM seals are fitted to maintain tight sealing across this temperature span and to resist the chemical constituents of modern hydraulic oils. The combined viscosity, temperature, and sealing provisions prevent excessive internal leakage, protect surface finishes, and help the spool maintain low hysteresis during continuous service in automated hydraulic systems.
Technical Specifications
Cleanliness Class (main Valve)
ISO 4406 20/18/15
Hydraulic Fluid
Mineral Oil (HL, HLP)
Max Fluid Temp
+80 °C
Max Operating Pressure (main)
315 bar
Max Pilot Drain Pressure (y)
30 bar
Max Pilot Pressure (main Stage)
25 bar
Max Return Port Pressure (t)
315 bar
Max Viscosity
380 mm²/s
Min Fluid Temp
–20 °C
Min Viscosity
20 mm²/s
Mounting Pattern
ISO 4401-05-05-0-94
Nominal Flow (Δp 10 Bar)
50 l/min
Pilot Oil Drain
External
Pilot Oil Supply
External
Seals
FKM (V)
Size
10
1620 Old Apex Road
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