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The 4WEH22E7X/6EW110N9S2DA directional valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation tasks. It is an electro-hydraulic 4-way device, so an electrical signal engages a pilot stage that drives the main spool to direct pressure and return oil to selected ports. The valve uses a spring-centered design that restores neutral without command, and it offers three spool positions described by symbol E to achieve alternate flow patterns. Nominal size NG25 (code W.H 22) matches CETOP mounting surfaces, and the pilot circuit draws oil from an external supply and return line. A pilot flow of 35 l/min enables fast switching when at least 10.5 bar is available in the spring-centered state.
The e-profile spool passes up to 450 l/min, making the unit suitable for high-volume actuators. Ports P, A, and B withstand 280 bar, the tank port is limited to 250 bar, and the pilot stage tolerates 210 bar, so system designers can allocate pressures accordingly. Switching time can be adjusted with the discharge control feature identified by code S2, giving flexibility in cycle tuning. A concealed manual override marked N9 permits local actuation during setup or power loss. Total weight with both solenoids fitted is 11.9 kg, facilitating installation by a single technician.
Actuation Type
Electro-Hydraulic
Centering Method
Spring-Centered
Manual Override
Concealed (N9)
Max Flow (e Spool)
450 l/min
Max Pilot Pressure
210 bar
Max Pressure (p, A, B)
280 bar
Max Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Nominal Size
NG25 (W.H 22)
Pilot Flow For Fast Switching
35 l/min
Pilot Oil Flow
External Supply And Return
Spool Positions
3
Spool Symbol
E
Switching Time Adjustment
Discharge Control (S2)
Valve Function
4-Way
Weight (two Solenoids)
11.9 kg
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