Bosch Rexroth | 4WH32G6XS2
4WH32G6X/S2
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The 4WH32G6X/S2 directional spool valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for use in hydraulic automation where dependable flow routing is needed. The unit carries a nominal size of 32, and with spool symbol G arranged in three positions it accommodates up to 650 l/min when system pressure reaches 280 bar on ports P, A, or B. Switching time can be tuned through the discharge control mechanism, and achieving the quickest response requires a pilot flow of 45 l/min delivered through an external pilot oil supply that keeps control pressure separate from the main circuit.
The valve body for hydraulic actuation weighs 39.5 kg, so the mounting interface must support that load while following the ISO 4401 pattern fastened to 340 Nm. The pilot stage tolerates pressures to 250 bar, and the external drain at port Y shares the same 250 bar limit. A spring-centered design returns the spool when pressure drops below 8.5 bar, working in conjunction with an internal pilot volume of 29.4 cm³ to cushion movement. Service life is underscored by an MTTFd of 150 years, providing long-term reliability in industrial hydraulic systems.
Technical Specifications
Max Flow At 280 Bar (symbol G)
650 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure (port Y, External)
250 bar
Min Pilot Pressure (spring-centered)
8.5 bar
Mounting Pattern
ISO 4401
Mounting Screw Torque (m20)
340 Nm
Mttfd
150 years
Nominal Size
32
Pilot Flow For Shortest Switching Time
45 l/min
Pilot Oil Supply
External
Pilot Volume (3-pos, Spring-centered)
29.4 cm3
Spool Positions
3
Spool Symbol
G
Switching Time Adjustment
Discharge Control
Weight (hydraulic Actuation)
39.5 kg
1620 Old Apex Road
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