Bosch Rexroth | 4WEH32H6X6EG12N9TK4
4WEH32H6X/6EG12N9TK4
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The 4WEH32H6X/6EG12N9TK4 directional spool valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth. It controls hydraulic flow in automation systems that require dependable switching between pressure lines and tank return. The valve is built in size NG32, providing port dimensions suited for high-capacity circuits, and it accommodates up to 1100 l/min without excessive pressure loss. Ports p, A, and B withstand 350 bar, while the t port is limited to 250 bar, which defines the safe back-pressure level on return passages. A pressure-centered spool returns to neutral when pilot pressure is absent; the element shifts once at least 8.5 bar reaches the pilot chamber. Pilot oil is supplied externally through the X port and returns internally via T, reducing external hose runs. The ISO 4401-10-09-0-05 porting pattern ensures interchangeability with standard subplates.
Electrical connection is made through a DIN EN 175301-803 K4 plug so coil wiring conforms to common industrial harnesses. The valve mounts with M20 × 80 screws defined by ISO 4762, and each screw is tightened to 340 Nm to maintain gasket compression under load. Control lines may reach 250 bar pilot pressure, allowing reliable actuation even in high-pressure systems. The maximum surface coating thickness of 100 µm guards against corrosion while preserving machining tolerances. In its pressure-centered configuration with two solenoids, the unit weighs 41.0 kg, a consideration for handling fixtures and support plates. A mean time to dangerous failure of 100 years underscores the component’s statistical reliability in long-term service.
Technical Specifications
Centering Type
Pressure-Centered
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow
1100 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
350 bar
Max Pressure (t Port)
250 bar
Min Pilot Pressure (press.-centered)
8.5 bar
Mounting Screws
M20 x 80 (ISO 4762)
Mttfd
100 years
Pilot Return
Internal (T)
Pilot Supply
External (X)
Porting Pattern
ISO 4401-10-09-0-05
Screw Tightening Torque
340 Nm
Size
NG32
Surface Coating Thickness Max
100 µm
Weight (press.-centered, 2 Solenoids)
41.0 kg
1620 Old Apex Road
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