Bosch Rexroth | 4WEH22L7X6EG24N9ETS2K4B10-CSA
4WEH22L7X/6EG24N9ETS2K4/B10 CSA
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The 4WEH22L7X/6EG24N9ETS2K4/B10 CSA directional spool 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 L three-position spool so actuators can be driven in both directions or held in neutral, and it bolts to manifolds machined to the ISO 4401-10-09-0-05 porting pattern to maintain interchangeability across machines. A solenoid rated at 24 V DC energizes the pilot stage, and the DIN EN 175301-803 K4 plug provides a quick-disconnect interface for control wiring. The housing supports up to 450 l/min so high-volume lines can be routed without excessive pressure drop, and the main ports tolerate operating pressures up to 280 bar to match common pump ratings. Internal pilot oil supply and return, identified by the ET code, eliminate external pilot plumbing, and NBR seals allow continuous operation with fluid temperatures as high as 80 °C.
Pilot control limits define the actuation range; the spool shifts whenever internal pressure exceeds 10.5 bar and remains stable up to a pilot pressure of 210 bar, while the circuit must provide at least 4.5 bar at port P when the X pilot channel is internal. Cleanliness class 20/18/15 per ISO 4406 is required so the precision edges are not damaged by particulate matter. A concealed manual override (N9) lets maintenance staff move the spool during commissioning without exposing the control pin. A replaceable Ø1.0 mm throttle insert marked B10 can be fitted to damp flow surges. Installation is secured with screws tightened to 100 Nm, and the calculated mean time to dangerous failure is 100 years, supporting long safety intervals.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 K4
Hydraulic Fluid Temp Max (nbr)
+80 °C
Manual Override
Concealed (N9)
Max Flow (spool 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
Min Pressure At P For X Internal
4.5 bar
Mounting Screw Torque
100 Nm
Mttfd
100 Years
Pilot Oil Supply/return
Internal (ET)
Porting Pattern
ISO 4401-10-09-0-05
Spool Symbol
L (3-Position)
Throttle Insert
Ø1.0 mm (B10)
1620 Old Apex Road
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