Bosch Rexroth | 4WEH10D4X6EG12N9K4
4WEH10D4X/6EG12N9K4
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The 4WEH10D4X/6EG12N9K4 valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series and directs hydraulic flow in automated systems. It is built in size NG10 so it aligns with medium-frame manifolds, and its porting pattern matches ISO 4401-05-05-0-05 for direct mounting on standardized subplates. A 4-way layout with two spool positions and the D spool symbol alternates pressure between service lines while venting the opposite side. The unit carries a maximum flow rating of 160 l/min to suit mid-capacity circuits with limited pressure drop. Ports P, A, and B withstand up to 280 bar, enabling use in high-pressure machinery. NBR sealing elements contain petroleum-based fluid and reduce internal leakage during continuous duty.
Pilot control uses an external supply at port X and returns oil externally through port Y, establishing independent pilot pressure management. Spool actuation begins at a minimum pilot pressure of 10 bar and remains safe up to a pilot limit of 250 bar. Port T is rated for 280 bar to survive line surges, whereas port Y in direct-current operation is limited to 210 bar to protect the pilot cover. Electrical connection is provided by a DIN EN 175301-803 plug coded K4, allowing quick coil replacement. A concealed manual override designated N9 lets maintenance staff shift the spool without energizing the solenoids. These interface, pressure, and control provisions support reliable valve performance in automated hydraulic equipment.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
280 bar
Max Pressure Port Y (dc)
210 bar
Min Pilot Pressure (2-spool Spring)
10 bar
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-05-05-0-05
Seal Material
NBR
Size
NG10
Spool Positions
2
Spool Symbol
D
Way Configuration
4-Way
1620 Old Apex Road
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