Bosch Rexroth | H-4WEH10E4X6EW110N9ETDALB10D3
H-4WEH10E4X/6EW110N9ETDAL/B10D3
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The H-4WEH10E4X/6EW110N9ETDAL/B10D3 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is intended to shift hydraulic flow paths in automated circuits. It uses an E-type spool in nominal size NG10 to direct oil through the ISO 4401-05-05-0-05 porting pattern. A maximum operating pressure of 350 bar is permitted at ports P, A, and B, while the E spool supports up to 160 l/min to suit medium-flow actuators. Internal pilot oil is supplied from P and returned to T, so no external pilot lines are needed. The manual override is concealed, allowing emergency actuation without leaving external parts exposed. System fluid must meet cleanliness class ISO 4406 20/18/15 to limit wear and maintain accurate spool positioning.
The pilot stage is rated for a maximum of 250 bar and must not exceed 160 bar on the internal return line; spring-centered operation begins once 12 bar is available. A B10 pilot throttle insert is fitted to meter pilot flow, and an integrated D3 pressure-reducing valve stabilizes pilot pressure before it reaches the main spool. Installation uses four M6 × 45 screws tightened to 12.5 N·m ±10 % to hold the valve against its subplate and protect the seals from leakage under pressure cycling.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed
Max Flow (ng10, E Spool)
160 l/min
Max Internal Pilot Return Pressure
160 bar
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
12 bar
Mounting Screw Torque
12.5 Nm ±10%
Mounting Screws
M6 x 45 (4 pcs)
Nominal Size
NG10
Pilot Oil Return
Internal To T
Pilot Oil Supply
Internal From P
Pilot Throttle Insert
B10
Porting Pattern
ISO 4401-05-05-0-05
Pressure Reducing Valve
D3
Spool Symbol
E
1620 Old Apex Road
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