Bosch Rexroth | 4WEH32E6X6EW110N9TDA
4WEH32E6X/6EW110N9TDA
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The 4WEH32E6X/6EW110N9TDA belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth to direct hydraulic flow in automated systems. Electro-hydraulic actuation allows the main spool to shift with electrical signals while using pilot oil for force amplification. The valve is built in NG32 size so it suits circuits that need large passage areas, and its 4/3-way configuration with an E-type spool provides three discrete flow paths for pressure, tank, and work ports. A 6E high-power pilot valve variant moves the spool quickly under demanding loads, supporting a maximum flow of 680 l/min at 350 bar system pressure. The design withstands a continuous operating pressure of 350 bar without derating, enabling use in high-pressure mobile or industrial machinery.
An external X port feeds the pilot oil so supply pressure can be optimized independently of the main lines, while the return path is internal to the T gallery to simplify plumbing. Pilot operation remains stable between a minimum of 8.5 bar and a maximum of 250 bar, and each shift displaces 29.4 cm³ of pilot oil to move the spool over its three positions. A concealed N9 solenoid override permits manual actuation during commissioning without exposing the mechanism to contaminants. The mounting pattern follows ISO 4401-10-09-0-05, allowing direct installation on standardized sub-plates. Functional safety is supported by an MTTFd of 100 years, reflecting low probability of dangerous failure throughout the product’s service life.
Technical Specifications
Actuation
Electro-Hydraulic
Max Flow At 350 Bar (e)
680 l/min
Maximum Operating Pressure
350 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure
8.5 bar
Mounting Pattern
ISO 4401-10-09-0-05
Mttfd (type Weh)
100 years
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Switching Volume
29.4 cm3
Pilot Valve Variant
6E High-Power
Size
NG32
Solenoid Override
Concealed (N9)
Spool Positions
3
Spool Type
E
Valve Configuration
4/3-Way
1620 Old Apex Road
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