Bosch Rexroth | H-4WEH32C6X6EW110N9DA
H-4WEH32C6X/6EW110N9DA
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The H-4WEH32C6X/6EW110N9DA directional valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series. It directs hydraulic flow to actuators in automated machinery. The nominal size is NG32, allowing high flow capacity through a standardized interface. A maximum flow rating of 1100 l/min supports large volume circuits. Service ports P, A, and B can be loaded up to 350 bar, enabling use in high-pressure systems. The spool is type C, so the internal lands create the required flow paths for typical cylinder control. Two switching positions provide either energized or de-energized states for basic extend or retract logic. A 4-way port configuration supplies pressure, tank, and two work lines in a single envelope. The subplate interface follows the ISO 4401-10-09-0-05 pattern, ensuring interchangeability with common manifolds. With one solenoid fitted, the assembly weighs 17.6 kg, which influences mounting support design.
For reliable operation, the supplied oil must not exceed contamination class ISO 4406 20/18/15, reducing wear on the spool and housing. Tank port back-pressure is limited to 250 bar, matching the maximum rating for port t. The pilot stage may be fed up to 250 bar while a minimum of 10 bar is required to shift the spool against the return spring. Each actuation consumes 58.8 cm³ of pilot oil, information needed for sizing accumulators in fail-safe systems. The valve is secured with six M20 × 80 mounting bolts tightened to 340 Nm, which prevents loosening under shock loads. An expected mean time to dangerous failure of 100 years supports long service intervals in safety circuits.
Technical Specifications
Fluid Cleanliness
ISO 4406 20/18/15
Max Flow
1100 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Operating Pressure (t)
250 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-spool Spring)
10 bar
Mounting Bolt Torque
340 Nm
Mounting Bolts
6 × M20 × 80
Mttfd
100 years
Nominal Size
NG32
Pilot Volume Per Switch (2-spool)
58.8 cm3
Port Configuration
4-Way
Porting Pattern
ISO 4401-10-09-0-05
Spool Type
C
Switching Positions
2
Weight (one Solenoid)
17.6 kg
1620 Old Apex Road
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