Bosch Rexroth | 4WEH32G6X6EW110N9TK4
4WEH32G6X/6EW110N9TK4
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The 4WEH32G6X/6EW110N9TK4 valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow in automated machinery by shifting a G-coded spool to selected ports. The NG32 size provides a bore diameter that matches large flow circuits, while the ISO 4401-10-09-0-05 porting pattern aligns the valve body with standard subplates. A spring-centered return recenters the spool when pilot pressure is removed, and this function requires at least 8.5 bar to initiate movement. Pilot oil is supplied through external port X so system pressure must be available upstream, and the exhausted pilot fluid is routed back internally through port T to simplify piping. A concealed manual override lets maintenance staff shift the spool without tooling, and the DIN EN 175301-803 K4 connector brings coil power into the solenoid assembly.
For duty cycles up to 280 bar on ports P, A, and B, the valve withstands system pressure while supporting a maximum flow of 650 l/min at that rating. The pilot stage tolerates 250 bar on the supply side and 160 bar on the internal return path for AC coils, ensuring reliable actuation under high load conditions. Bolting the housing with 340 Nm of screw torque keeps the seal compression uniform during pressure surges. Cleanliness class 20/18/15 according to ISO 4406(c) must be maintained in the hydraulic fluid to protect the metering edges. The mean time to dangerous failure is 100 years, reflecting the design reliability required for long-term automation service.
Technical Specifications
Cleanliness Class
20/18/15 (ISO 4406(c))
Control Spool Return
Spring-Centered
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed
Max Flow (g, 280 Bar)
650 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal)
160 bar (AC)
Min Pilot Pressure (spring-centered)
8.5 bar
Mttfd
100 years
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-10-09-0-05
Screw Tightening Torque
340 Nm
Size
NG32
Spool Symbol
G
1620 Old Apex Road
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