Bosch Rexroth | 4WEH22D7X6EW110N9TDA
4WEH22D7X/6EW110N9TDA
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The 4WEH22D7X/6EW110N9TDA belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation systems that require reliable flow direction control. It is supplied in nominal size NG25 (W.H 22) and follows the ISO 4401-08-08-0-05 porting pattern for straightforward manifold mounting. Pilot oil enters externally through port X and returns internally through port T, while a 4WE6 high-power pilot stage delivers 35 l/min of pilot flow to achieve fast switching. A concealed N9 manual override lets maintenance personnel shift the spool without energizing the solenoid. The two-spool configuration encloses 15.28 cm³ of pilot volume, and the complete valve with one solenoid weighs 11.5 kg.
The unit supports a maximum flow of 400 l/min at 280 bar on P, A, and B ports when symbol D is selected, and overall operating pressure is limited to the same 280 bar. Pilot pressure can be raised to 210 bar but must reach at least 11 bar when spring-centered spools are used to guarantee actuation. Installation uses six M12 × 60 screws per ISO 4762 tightened to 100 Nm, securing the interface against high pressure. Mechanical durability is illustrated by an MTTFd of 100 years, matching the robust build quality expected from the WEH series.
Technical Specifications
Manual Override
Concealed (N9)
Max Flow @ 280 Bar (symbol D)
400 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (2-spool, Springs)
11 bar
Mounting Screw Torque
100 Nm
Mounting Screws
6x M12 x 60 (ISO 4762)
Mttfd
100 years
Nominal Size
NG25 (W.H 22)
Pilot Flow For Fast Switching
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Valve Type
4WE6 (6E High-Power)
Pilot Volume (2-spool)
15.28 cm³
Porting Pattern
ISO 4401-08-08-0-05
Weight (1 Solenoid)
11.5 kg
1620 Old Apex Road
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