Bosch Rexroth | H-4WEH32HE6X6EW110N9DA
H-4WEH32HE6X/6EW110N9DA
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The H-4WEH32HE6X/6EW110N9DA directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and shifts high-volume hydraulic circuits in automated machinery. With a maximum flow capacity of 1100 l/min, the unit can direct large oil volumes without excessive pressure drop. Its NG32 size matches systems that use the ISO 4401-10-09-0-05 porting pattern, simplifying manifold design. The valve is arranged for subplate mounting so replacement can occur without disturbing hard piping. Six M20 × 80 mounting screws in accordance with ISO 4762 secure the body, and each screw must be tightened to 340 Nm to preserve seal integrity. A cleanliness class of 20/18/15 per ISO 4406 is required for the hydraulic fluid, preventing erosion of the spool lands under continuous duty. The maximum operating pressure of 350 bar on ports P, A, and B lets the component work in high-pressure power units used for presses and molding machines.
The valve weighs 41.0 kg with two solenoids installed, so a lifting sling is suggested for safe handling during maintenance. A pilot flow of 45 l/min in the shortest switching configuration supplies enough control oil to move the spool rapidly, improving machine cycle time. The pilot oil enters through an M12 × 1.5 supply plug that keeps external tubing compact, and a pilot volume of 29.4 cm³ in the three-position version defines the oil that must be displaced at every shift. Reliable actuation begins at a pilot pressure of 8.5 bar, while the pilot circuit is permitted to climb to 250 bar when remote boosters are used. Port T can withstand return flows up to 250 bar, so the valve can be placed downstream of counterbalance devices. An MTTFd of 100 years underpins functional safety calculations for machinery that demands extended service life.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Max Flow
1100 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (3-position)
8.5 bar
Mounting Screws
6× M20 x 80 (ISO 4762)
Mounting Type
Subplate Mounting
Mttfd
100 years
Pilot Flow (shortest Switching)
45 l/min
Pilot Oil Plug (supply)
M12 x 1.5
Pilot Volume (3-position)
29.4 cm3
Porting Pattern
ISO 4401-10-09-0-05
Screw Tightening Torque
340 Nm
Size
NG32
Weight (two Solenoids)
41.0 kg
1620 Old Apex Road
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