Bosch Rexroth | 4WEH32G6X6EW110N9ES2K4B10P45
4WEH32G6X/6EW110N9ES2K4/B10/P4.5
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The 4WEH32G6X/6EW110N9ES2K4/B10/P4.5 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. Designed for electro-hydraulic actuation, it directs flow in automation circuits that require precise switching under load. The unit conforms to nominal size NG32 so it matches manifolds of that size. A 4-way configuration allows control of two actuator ports plus pressure and tank. The valve mounts on sub-plates following the ISO 4401-10-09-0-05 porting pattern. Internal pilot oil supply feeds the control stage while an external Y port handles pilot oil return. Pilot operation functions within a pressure window from a minimum of 4.5 bar to a maximum of 250 bar, enabling reliable shifting without unintentional movement.
Electrical power reaches the solenoids through a DIN EN 175301-803 K4 connector, and a concealed manual override labeled N9 allows local actuation during commissioning or fault recovery. Switching time can be fine-tuned via the S2 discharge control, and a 1.0 mm B10 throttle insert can be fitted to adjust pilot flow. Preload on the main stage opens at 4.5 bar as defined by the P4.5 cracking pressure code. The hydraulic cleanliness requirement is ISO 4406 class 20/18/15 to minimize wear. Working ports P, A, and B withstand pressures up to 280 bar, while the T return port is limited to 250 bar. These limits guide system designers when setting pump relief and tank back-pressure values.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Pressure Port P,a,b
280 bar
Max Pressure Port T
250 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (x Internal)
4.5 bar
Nominal Size
NG32
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-10-09-0-05
Preload Valve Cracking Pressure
4.5 bar (P4.5)
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert Orifice
1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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