Bosch Rexroth | 4WEH10W4X6EW110N9SDK25LV
4WEH10W4X/6EW110N9SDK25L/V
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The 4WEH10W4X/6EW110N9SDK25L/V valve is produced by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow by means of electro-hydraulic actuation so that electronic commands can shift the internal spool without direct mechanical effort. The unit follows the ISO 4401-05-05-0-05 porting pattern and is built in nominal size NG 10, making it suitable for mid-flow manifolds. Three discrete spool positions are provided, and the W-coded spool geometry manages parallel A-to-B flow paths in its working states. A concealed manual override identified by the N9 suffix allows local intervention when electrical power is absent. Supply-side switching time can be trimmed through the S-designated adjustment feature, and a 2.4 mm² free cross-section is available at zero position to permit limited tank bleed-off while centered.
The hydraulic envelope accepts line pressures up to 280 bar on ports P, A, and B, while the pilot stage tolerates 250 bar without affecting response. Spring-centered operation requires at least 12 bar pilot pressure, and the external pilot return line may carry up to 160 bar back to tank. Pilot oil is taken internally, whereas the return path is routed externally, both denoted by the E identification in the type code. Cleanliness of the supplied oil must not exceed ISO 4406 level 20/18/15 to preserve reliable metering edges. Installation is completed with four M6 × 45 screws that conform to ISO 4762, providing the clamping force needed to seal the sub-plate interface.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y, External)
160 bar
Min Pilot Pressure (3-spool, Spring-centered)
12 bar
Mounting Screws
M6 x 45 (ISO 4762)
Nominal Size
NG 10
Pilot Return
External (E)
Pilot Supply
Internal (E)
Porting Pattern
ISO 4401-05-05-0-05
Spool Positions
3
Spool Symbol
W
Switching Time Adjustment
Supply Control (S)
Zero-pos. Free Cross-section (w, A–t; B–t)
2.4 mm2
1620 Old Apex Road
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