Bosch Rexroth | 4WEH22E7X6EW110N9S2K4
4WEH22E7X/6EW110N9S2K4
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The 4WEH22E7X/6EW110N9S2K4 valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation systems that require reliable flow direction control. It uses electro-hydraulic actuation to shift the spool in response to electrical commands and pilot pressure. The e-spool passage handles up to 450 l/min, and the nominal size is NG25, which defines port geometry within the manifold. Working pressure at the P, A, and B ports reaches 280 bar, while the return port t withstands 250 bar, making the unit suitable for high-pressure loops. Pilot operation remains stable between a minimum of 10.5 bar and a maximum of 210 bar. The housing mounts to an ISO 4401-08-08-0-05 interface using six M12 × 60 screws that must be tightened to 100 Nm to secure the valve against the block.
Fluid cleanliness must meet ISO 4406 class 20/18/15 to protect the spool and lands from abrasive wear. A concealed manual override designated N9 enables local shifting if electrical power is lost. The pilot stage is a 4WE 6E valve, and each switching event draws 7.64 cm³ of pilot oil, figures that assist in sizing the pilot supply lines. Allowed fluid viscosity ranges from 2.8 mm²/s to 500 mm²/s so common mineral hydraulic oils remain within limits across temperature changes. Adhering to these secondary parameters keeps response time predictable and ensures the valve performs consistently within the operating envelope described above.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow (e Spool)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Return Port Pressure (t)
250 bar
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure
10.5 bar
Mounting Interface
ISO 4401-08-08-0-05
Mounting Screws
M12 x 60 (6 pcs)
Nominal Size
NG25
Pilot Control Valve
4WE 6E
Pilot Volume Per Switch
7.64 cm3
Screw Tightening Torque
100 Nm
Viscosity Maximum
500 mm2/s
Viscosity Minimum
2.8 mm2/s
1620 Old Apex Road
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