Bosch Rexroth | 4WEH10H4X6EW110N9K4-CSA
4WEH10H4X/6EW110N9K4 CSA
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The 4WEH10H4X/6EW110N9K4 CSA directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth. It redirects pressure lines in hydraulic automation systems through electro-hydraulic actuation, where an energized pilot stage moves the main spool. A nominal size of NG10 defines the flow passages, and the valve carries up to 160 l/min for medium-capacity circuits. Ports P, A, and B tolerate 280 bar, while the pilot gallery accepts 250 bar to secure consistent shifting. Installation uses subplate mounting, and the port pattern follows ISO 4401-05-05-0-05 so the body pairs with standard manifolds.
Service is permitted between −20 °C and +50 °C, letting the valve run in cold starts or elevated shop temperatures. Hydraulic oil may reach +80 °C if its viscosity remains between 2.8 mm²/s and 500 mm²/s, a span that covers typical mineral and synthetic blends. System cleanliness must achieve ISO 4406 class 20/18/15 to protect the spool lands, and the mating surface needs a maximum roughness of Rz 4 µm for leak-free sealing. With two solenoids fitted, the assembly weighs 6.8 kg, allowing a single technician to position the unit during maintenance or retrofit work.
Technical Specifications
Actuation
Electro-Hydraulic
Ambient Temp Max (nbr)
+50 °C
Ambient Temp Min (nbr)
-20 °C
Cleanliness Class
ISO 4406 20/18/15
Fluid Temp Max (nbr)
+80 °C
Max Flow (ng10)
160 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Mounting Interface
ISO 4401-05-05-0-05
Mounting Type
Subplate Mounting
Nominal Size
NG10
Required Surface Quality
Rzmax 4
Viscosity Max
500 mm²/s
Viscosity Min
2.8 mm²/s
Weight (two Solenoids)
6.8 kg
1620 Old Apex Road
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