Bosch Rexroth | 4WEH22L7X6EW110N9ETDAB15V
4WEH22L7X/6EW110N9ETDA/B15V
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The 4WEH22L7X/6EW110N9ETDA/B15V directional spool valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation circuits where electrical actuation controls flow paths. It is supplied in NG25 (W.H 22) size, and the porting pattern follows ISO 4401-08-08-0-05 so it fits standard subplates. The unit provides three spool positions described by symbol L, and the spool is returned to center by a spring-centered mechanism when the solenoids are de-energized. Internal pilot oil supply and internal pilot oil return eliminate external pilot lines, while a minimum pilot pressure of 10.5 bar is needed to shift the spool. A concealed N9 manual override permits local actuation during commissioning. A B15 throttle insert with a 1.5 mm orifice limits pilot flow to stabilize switching dynamics.
During operation the valve handles up to 450 l/min through symbol L flow paths and withstands a maximum operating pressure of 280 bar at ports P, A, and B, while pilot passages tolerate up to 210 bar. Hydraulic fluid must meet cleanliness class 20/18/15 according to ISO 4406 to protect internal surfaces and maintain the stated mean time to dangerous failure of 100 years. Sealing elements are made from FKM to accommodate higher temperatures and aggressive media. With two solenoids installed the assembly weighs 11.9 kg, a consideration for manifold support structures. These characteristics qualify the valve for reliable, high-load directional control in presses, injection machines, and other automated hydraulic systems.
Technical Specifications
Centering Method
Spring-Centered
Cleanliness Class
20/18/15 (ISO 4406)
Manual Override
Concealed (N9)
Max Flow (symbol L)
450 l/min
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mttfd (type Weh)
100 years
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM (V)
Spool Positions
3
Spool Symbol
L
Throttle Insert
Ø 1.5 mm (B15)
Valve Size
NG25 (W.H 22)
Weight (two Solenoids)
11.9 kg
1620 Old Apex Road
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