Bosch Rexroth | H-4WEH32G6X6EG24N9K4
H-4WEH32G6X/6EG24N9K4
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The H-4WEH32G6X/6EG24N9K4 directional spool valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation that requires controlled flow direction. It is provided in nominal size NG32, enabling large passage areas for demanding circuits. The unit withstands 350 bar at ports P, A, and B, and supports a maximum flow of 450 l/min at that pressure when an external pilot supply is used. Pilot oil is supplied through port X and returned through port Y, keeping pilot stages separate from the main flow path. Reliable spool movement begins at a minimum pilot pressure of 8.5 bar and is permitted up to 250 bar to protect pilot components. The spring-centered three-position design requires 29.4 cm³ of pilot oil per shift, which assists sizing of accumulators and lines. A fluid cleanliness level of ISO 4406 (c) 20/18/15 is specified to reduce wear and maintain response accuracy.
Electrical actuation is achieved with 24 V DC solenoids connected through a DIN EN 175301-803 K4 plug, allowing straightforward wiring in control cabinets. A concealed manual override identified as N9 lets technicians shift the spool locally during setup or fault finding without dismantling the coil. The t port accommodates case drain pressures up to 250 bar, while the y port in direct current operation is limited to 210 bar to safeguard seals. Interface mounting follows the ISO 4401-10-09-0-05 pattern and is fixed to the manifold by six M20 × 80 screws, providing secure retention under high load cycles. This configuration completes a valve assembly capable of handling high flow rates while maintaining safe operating pressures across all connections.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (g, 350 Bar, X Ext)
450 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
350 bar
Max Pressure (t Port)
250 bar
Max Pressure (y Port, Dc)
210 bar
Min Pilot Pressure (x External)
8.5 bar
Mounting Screws
M20 x 80 (6 pcs)
Nominal Size
NG32
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Volume (3-position, Spring-centered)
29.4 cm³
Porting Pattern
ISO 4401-10-09-0-05
Supply Voltage
24 V DC
1620 Old Apex Road
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