Bosch Rexroth | H-4WEH32G6X6EW110N9DA
H-4WEH32G6X/6EW110N9DA
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The H-4WEH32G6X/6EW110N9DA directional spool valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series for switching flow paths in hydraulic automation. It is built in size NG32, matching the mounting footprint specified by the ISO 4401-10-09-0-05 porting pattern. The valve carries a maximum operating pressure of 350 bar at ports A and B and can pass 450 l/min when that pressure is applied. Pilot control is performed by a type 6E stage that receives oil through an external X supply and returns it via an external Y line. The Y return can accept up to 160 bar, and the pilot circuit may be pressurized to 250 bar without exceeding design limits.
When the spool is spring-centered, the pilot requires a minimum of 8.5 bar and moves 29.4 cm³ of oil to initiate a shift. Port T tolerates 250 bar, allowing elevated back-pressure conditions. A concealed N9 manual override lets maintenance personnel actuate the spool directly. System fluid must satisfy ISO 4406 cleanliness class 20/18/15 to protect internal lands and sleeves. The design achieves an Mttfd of 100 years, supporting long-term reliability in safety-oriented hydraulic circuits.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow (g, 350 Bar)
450 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pressure Port T
250 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (spring-centered)
8.5 bar
Mttfd (type Weh)
100 years
Pilot Control Valve
Type 6E
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Return Y Max Pressure (ac)
160 bar
Pilot Volume (spring-centered)
29.4 cm3
Porting Pattern
ISO 4401-10-09-0-05
Size
NG32
1620 Old Apex Road
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