Bosch Rexroth | H-4WEH32E6X6EW110N9K4
H-4WEH32E6X/6EW110N9K4
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The H-4WEH32E6X/6EW110N9K4 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It guides hydraulic flow in automated machinery built around NG32 cavities. Electro-hydraulic actuation transforms an incoming electrical signal into pilot oil movement that shifts the main spool. A spring-centered mechanism returns the spool to its neutral position when power is removed. The valve carries a three-position spool with symbol E, enabling two working flow patterns and a centered all-ports-blocked state. Rated flow for this E spool reaches 750 l/min at 280 bar, which helps size circuit components. External pilot ports X and Y separate control oil from load pressure for stable operation. Pilot shift begins at 8.5 bar, so low-pressure pilot supplies are acceptable.
Maximum pressure at ports P, A, and B is 350 bar, while the T port is limited to 250 bar to protect the return line. Pilot supply can rise to 250 bar without damaging the control stage. The housing passes up to 1100 l/min, allowing high-flow cycles without excessive pressure drop. An ISO 4401-10-09-0-05 mounting interface aligns the valve with standardized subplates. Electrical power reaches the solenoid through a DIN EN 175301-803 K4 connector for straightforward wiring. A concealed N9 manual override lets technicians shift the spool during setup without exposing moving parts. Fluid cleanliness must stay within ISO 4406 (c) 20/18/15 to prevent spool wear and sticking.
Technical Specifications
Actuation
Electro-Hydraulic
Centering
Spring-Centered
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
K4 (DIN EN 175301-803)
Flow At 280 Bar (symbol E)
750 l/min
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Pressure (t Port)
250 bar
Maximum Flow
1100 l/min
Min Pilot Pressure
8.5 bar
Mounting Interface
ISO 4401-10-09-0-05
Pilot Oil Configuration
External (X and Y)
Size
NG32
Spool Positions
3-Position
Spool Symbol
E
1620 Old Apex Road
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