Bosch Rexroth | 4WEH22E7X6EW110N9ETDALB10-CSA
4WEH22E7X/6EW110N9ETDAL/B10 CSA
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The 4WEH22E7X/6EW110N9ETDAL/B10 CSA directional spool valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. Designed for electro-hydraulic actuation, it directs high-pressure oil in automated circuits that demand rapid switching and precise control. The valve is built as a 4/3-way unit so the spool provides two controlled flow paths plus a center position for neutral or pressure holding functions. Its nominal size NG25 matches the ISO 4401-08-08-0-05 mounting pattern, allowing direct stacking on standard subplates without adapters. Flow capability reaches 450 l/min under symbol E, supporting large actuators in presses or injection machinery, while ports P, A, and B tolerate operating pressures up to 280 bar. At 11.9 kg with two solenoids and spring centering, the assembly offers a compact yet robust envelope for manifold layouts.
Internal pilot oil supply and return, identified by the ET code, remove the need for external pilot lines and keep installation straightforward. The concealed N9 manual override lets maintenance staff shift the spool during commissioning or power loss without exposing moving parts. Pilot control circuits can handle up to 210 bar, and the spool will still shift reliably once the pilot pressure exceeds the 10.5 bar minimum for three-position spring-centered designs. The valve withstands counter-pressure on port T up to 250 bar, enabling use in systems with elevated tank lines. A Ø1.0 mm throttle insert marked B10 moderates pilot flow to prevent shock during actuation. Required oil cleanliness is ISO 4406 20/18/15 to safeguard the precision fit between spool and housing, and an MTTFd of 100 years supports long service intervals in safety-related hydraulic automation.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow (symbol E)
450 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Max T Port Pressure
250 bar
Min Pilot Pressure (3-pos, Spring-cent.)
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
Size (ng)
25
Throttle Insert
Ø1.0 mm (B10)
Way Configuration
4/3-Way
Weight (2 Solenoids, Spring-centered)
11.9 kg
1620 Old Apex Road
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