Bosch Rexroth | 4WEH10G4X6EW110N9SDA
4WEH10G4X/6EW110N9SDA
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The 4WEH10G4X/6EW110N9SDA valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth for hydraulic automation where directional control is required. Its NG10 nominal size sets the port dimensions and flow path area for medium-capacity circuits, while the ISO 4401 mounting interface lets users bolt the unit directly to standardized subplates. Three discrete spool positions permit forward flow, reverse flow, and a centered neutral state, and a spring-centered assembly with two solenoids gives the product a total weight of 6.8 kg. Main ports tolerate operating pressures up to 280 bar so the valve can be placed in high-pressure systems without derating. A maximum flow rate of 130 l/min at 280 bar is achievable with the G-type spool profile, providing ample volume for dynamic actuators. Pilot actuation begins when at least 12 bar is present, ensuring reliable shifting even during low supply conditions.
Pilot passages withstand pressures up to 250 bar, protecting the control stage when upstream transients occur. The design accepts hydraulic oils ranging from 2.8 mm²/s to 500 mm²/s in viscosity, giving users broad latitude in fluid selection. Continuous operation is supported between oil temperatures of –20 °C and 80 °C, and the housing endures ambient conditions from –20 °C to 50 °C without performance change. System cleanliness must stay at or better than ISO 4406 code 20/18/15 to avoid spool sticking and wear. A mean time to dangerous failure of 100 years indicates a long statistical service life in properly maintained installations. Adhering to these limits preserves consistent switching behavior and minimizes unplanned maintenance.
Technical Specifications
Ambient Temp Max (nbr)
50 C
Ambient Temp Min (nbr)
-20 C
Cleanliness Class (iso 4406 C)
20/18/15
Max Flow (spool G, 280 Bar)
130 l/min
Max Operating Pressure
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure
12 bar
Mounting Interface
ISO 4401
Mttfd
100 years
Nominal Size
NG10
Oil Temp Max (nbr)
80 C
Oil Temp Min (nbr)
-20 C
Spool Positions
3
Viscosity Max
500 mm2/s
Viscosity Min
2.8 mm2/s
Weight (2 Solenoids, Spring-centered)
6.8 kg
1620 Old Apex Road
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