Bosch Rexroth | 4WEH22HD7X6EW110N9TK4V
4WEH22HD7X/6EW110N9TK4/V
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The 4WEH22HD7X/6EW110N9TK4/V valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and directs oil flow in automated hydraulic systems. It relies on electro-hydraulic actuation, so an upstream pilot stage moves the main spool without manual force. A 4-way flow path enables bidirectional motion of cylinders, while the D spool establishes hydraulic end positions for repeatable port closure. The nominal size 25 envelope supports medium-capacity manifolds, and the ISO 4401-10-09-0-05 porting pattern matches standard subplates. Up to 450 l/min of flow can pass through the body, and ports A and B handle working pressures to 280 bar. Pilot oil is supplied externally through channel X, allowing its pressure to be tuned independently of the main circuit.
An electrical interface formed by a DIN EN 175301-803 K4 plug provides simple coil connection. FKM seals tolerate common hydraulic media and elevated operating temperatures, and system cleanliness must reach ISO 4406 class 20/18/15 to avoid contamination-related wear. The pilot stage accepts pressures up to 210 bar but requires at least 8 bar to shift the spool, consuming 35 l/min during the shortest switch cycle. Pilot oil returns internally to port T so no external drain line is needed. In two-spool versions the pilot chamber displaces 15.28 cm³, a volume that helps determine accumulator or pump sizing when rapid cycling is expected.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure
8 bar
Pilot Flow (shortest Switch Time)
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Volume (2-spool)
15.28 cm³
Porting Pattern
ISO 4401-10-09-0-05
Seal Material
FKM
Size (ng)
25
Spool Type
D (Hydraulic End Position)
Way Configuration
4-Way
1620 Old Apex Road
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