Bosch Rexroth | 4WEH32D6XOF6EW110N9ETDA
4WEH32D6X/OF6EW110N9ETDA
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The 4WEH32D6X/OF6EW110N9ETDA directional spool valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series and is intended to route hydraulic oil in automated machinery. Its NG32 size defines the mounting envelope and flow galleries required for large mobile or industrial drives. A 4/2-way spool furnishes two discrete flow conditions to start or stop actuators, and the 6E high-power solenoid supplies the magnetic force needed for fast, positive shifting. The main ports can pass up to 1100 l/min, supporting high displacement cylinders, while a maximum operating pressure of 280 bar on P, A, and B ports allows the circuit to develop substantial working force. Pilot oil is supplied internally through gallery X, avoiding external hoses, and it is returned internally from Y to T to simplify tank plumbing. The pilot stage endures pressures up to 250 bar, ensuring reliable actuation even when system transients peak.
The valve suits systems maintained to ISO 4406 cleanliness class 20/18/15 so that particle contamination does not score the precision spool. A concealed N9 manual override lets technicians shift the spool locally during setup without exposing the mechanism to dirt. Installation requires six M20 x 80 screws conforming to ISO 4762, providing the clamping force needed for the NG32 interface. The pilot section begins to respond at 5 bar, enabling operation in circuits with low standby pressure, and its internal Y gallery tolerates up to 160 bar when back-pressure builds. Each change of state consumes 58.8 cm³ of pilot oil, a value used for accumulator sizing and heat balance. The T port withstands 250 bar, letting designers run return lines at elevated pressure without jeopardizing sealing. An ISO 4401-10-09-0-05 porting pattern standardizes manifold drilling so the valve can be exchanged with other NG32 units without reworking the block.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Maximum Flow
1100 l/min
Mounting Screws
6 x M20 x 80 (ISO 4762)
Pilot Oil Return
Internal (Y to T)
Pilot Oil Supply
Internal (X)
Pilot Pressure Max
250 bar
Pilot Pressure Min (2-spool Hyd End)
5 bar
Pilot Return Y Max (internal, Ac)
160 bar
Pilot Volume Per Switch (2-spool)
58.8 cm3
Port T Max Pressure
250 bar
Porting Pattern
ISO 4401-10-09-0-05
Size
NG32
Solenoid Type
High-Power Valve (6E)
Valve Function
4/2-Way
1620 Old Apex Road
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