Bosch Rexroth | 4WEH32E6X6EW110N9S2K4
4WEH32E6X/6EW110N9S2K4
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The 4WEH32E6X/6EW110N9S2K4 directional spool valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series. It serves hydraulic automation by directing flow with electro-hydraulic actuation, where an electrical signal pilots oil to shift the spool. The valve is sized at nominal 32, giving passage areas compatible with large industrial cylinders. A maximum flow rating of 1100 l/min supports high output systems, and the housing tolerates operating pressures up to 350 bar for demanding work cycles. Pilot control starts at 8.5 bar to guarantee dependable switching, while pilot passages accept up to 250 bar so boosted pilot circuits can be used. External pilot oil supply keeps the control pressure independent of main line fluctuations, and an external pilot oil return prevents tank back-pressure from affecting the pilot stage.
Subplate mounting lets the unit drop onto a manifold without disturbing hard lines, held in place by six M20 x 80 screws. Each screw must be tightened to 340 Nm to seal the pressure interfaces. The porting follows ISO 4401-10-09-0-05, so manifolds with that pattern accept the valve without modification. Electrical power is connected through a DIN EN 175301-803 K4 plug that streamlines wiring and conforms to common cabinet layouts. A concealed manual override labeled N9 provides emergency spool actuation when electrical power is absent. The internal spool carries symbol E, delivering a predefined flow path for neutral, extension, and retraction positions. Switching time can be tuned by discharge control S2, allowing the designer to match valve response to system dynamics and reduce pressure spikes.
Technical Specifications
Actuation
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow
1100 l/min
Max Operating Pressure
350 bar
Min Pilot Pressure
8.5 bar
Mounting
Subplate
Mounting Screws
6x M20 x 80
Nominal Size
32
Pilot Oil Return
External
Pilot Oil Supply
External
Pilot Pressure Max
250 bar
Porting Pattern
ISO 4401-10-09-0-05
Screw Tightening Torque
340 Nm
Spool Symbol
E
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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