Bosch Rexroth | H-4WEH32HD6XOF6EW110N9S2K4
H-4WEH32HD6X/OF6EW110N9S2K4
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The H-4WEH32HD6X/OF6EW110N9S2K4 directional spool valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth for hydraulic automation tasks that require high flow routing. It is an electro-hydraulic, four-way NG32 spool that shifts between two hydraulic end positions when a pilot signal energizes the solenoids. The valve passes up to 1100 l/min while ports P, A, and B tolerate operating pressures of 350 bar. Mounting follows the ISO 4401-10-09-0-05 pattern for direct subplate installation, and electrical power is supplied through a DIN EN 175301-803 K4 connector. These characteristics enable the valve to control large cylinders or motors in presses, molding machines, and other automated equipment.
During operation the pilot stage accepts pressures to 250 bar yet requires only 5 bar to move the two-spool element, consuming 58.8 cm³ of pilot oil per shift. Switching time can be tuned by the S2 discharge control so response matches system dynamics, and a concealed N9 manual override allows mechanical actuation during commissioning or power loss. Return port T is limited to 250 bar, protecting tank lines against excess pressure. Oil cleanliness must be maintained at ISO 4406 class 20/18/15 to avoid spool sticking and wear. The type WEH design achieves a mean time to dangerous failure of 100 years, supporting long service life in continuous industrial duty cycles.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 Class 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Max Operating Pressure (t Port)
250 bar
Maximum Flow
1100 l/min
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (2-spool)
5 bar
Mttfd
100 Years (Type WEH)
Nominal Size
NG32
Pilot Volume For Switching (2-spool)
58.8 cm³
Porting Pattern
ISO 4401-10-09-0-05
Spool Positions
2 (Hydraulic End Position)
Switching Time Adjustment
S2 (Discharge Control)
Way Configuration
4-Way
1620 Old Apex Road
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