Bosch Rexroth | 4WEH32D6XOF6EW110N9S2DA
4WEH32D6X/OF6EW110N9S2DA
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The 4WEH32D6X/OF6EW110N9S2DA valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. Designed for hydraulic automation, it directs flow through an electro-hydraulic actuation stage that converts electrical pilot signals into spool movement. Its nominal size NG32 supports installations where large line diameters are required, and the porting pattern ISO 4401-10-09-0-05 lets the unit interface with standardized sub-plates. Two spool positions provide simple switching between designated flow paths, while a hydraulic return pushes the main spool back when pilot pressure is removed. The valve accommodates a maximum flow of 1100 l/min so high-volume circuits can be controlled without excessive pressure loss. A performance limit of 420 l/min at 350 bar applies to the D-spool configuration, defining the envelope for dynamic duty. Ports P, A, and B can be pressurized up to 350 bar, enabling operation in high-pressure systems without compromising component integrity.
Fluid quality requirements call for a cleanliness level of 20/18/15 per ISO 4406 so that the internal lands and orifices do not score or stick. A concealed manual override is provided, allowing maintenance personnel to shift the spool locally without exposing the mechanism to contamination. The pilot stage tolerates pressures up to 250 bar, while port T is limited to 250 bar, ensuring the return line can safely handle back-pressure during actuations. Pilot control begins at 5 bar on this hydraulic configuration, and the pilot cavities hold 58.8 cm³, which dictates response time and accumulator sizing. Installation relies on six M20 × 80 screws that follow ISO 4762, and each fastener must be tightened to 340 Nm to secure the valve body against the sub-plate and maintain seal compression under full load.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Main Spool Return
Hydraulic
Manual Override
Concealed
Max Flow (ng32)
1100 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Port T Pressure
250 bar
Min Pilot Pressure (2-spool Hydraulic)
5 bar
Mounting Screws
6x M20 x 80 (ISO 4762)
Nominal Size
NG32
Performance Limit (d Spool, 350 Bar)
420 l/min
Pilot Volume (2-spool)
58.8 cm3
Porting Pattern
ISO 4401-10-09-0-05
Spool Positions
2
Tightening Torque (m20 Screws)
340 Nm
1620 Old Apex Road
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