Bosch Rexroth | 4WEH32D6X6EW110N9DA
4WEH32D6X/6EW110N9DA
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The 4WEH32D6X/6EW110N9DA directional spool valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation tasks that require dependable flow reversal under load. It is supplied in valve size NG32, providing passage dimensions suitable for large industrial circuits. A 4/2-way spool with Symbol D allows the pressure line to be routed alternately to port A or port B while isolating the opposite service. Electro-hydraulic actuation converts an electrical signal into pilot oil movement so the main spool can be shifted without high-current coils. The pilot supply enters externally at port X, and a flow of 45 l/min is needed to obtain the shortest switching time. During each actuation the two-spool spring arrangement displaces 58.8 cm³ of oil, beginning reliably when pilot pressure reaches 10 bar and remaining safe up to 250 bar. To prevent abrasive wear, the hydraulic fluid must meet cleanliness class ISO 4406 20/18/15.
Main-line performance is defined by a maximum flow rate of 480 l/min when the inlet pressure is 280 bar, matching the 280 bar rating applied to ports A and B. Port T is limited to 250 bar so the return circuit remains within seal capability. Installation on a manifold uses six M20 × 80 screws, and each fastener must be tightened to 340 Nm to maintain leak-free contact. The body footprint conforms to the ISO 4401-10-09-0-05 port pattern, enabling direct replacement of similar NG32 elements without adapter plates. A single solenoid adds 17.6 kg to the valve, information needed to size support hardware and lifting tools. These pressure limits, flow capacity, and standardized mounting details establish a control component intended for heavy-duty machines where fast directional changes are executed repeatedly throughout the duty cycle.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Max Flow (d, 280 Bar)
480 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Operating Pressure (port T)
250 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-spool Spring)
10 bar
Mounting Screws
6 x M20 x 80
Pilot Flow For Shortest Switching
45 l/min
Pilot Supply
External (X)
Pilot Volume (2-spool)
58.8 cm3
Porting Pattern
ISO 4401-10-09-0-05
Spool Function
4/2-Way (Symbol D)
Tightening Torque (mounting)
340 Nm
Valve Size
NG32
Weight (one Solenoid)
17.6 kg
1620 Old Apex Road
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