Bosch Rexroth | H-4WEH22E7X6EW110N9ETK4B08D3
H-4WEH22E7X/6EW110N9ETK4/B08D3
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The H-4WEH22E7X/6EW110N9ETK4/B08D3 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is used to route pressure and return lines in hydraulic automation. This NG25 unit employs electro-hydraulic actuation, so an internal pilot stage shifts the main spool when an electrical signal is present. A 4-way flow path together with spool type E delivers bidirectional control of two work ports, and three spool positions provide centered, left, and right flow states. The valve withstands operating pressures up to 350 bar, making it suitable for high-pressure circuits. Internal pilot oil supply feeds the pilot chamber without external hoses, and internal pilot oil return channels the pilot flow back to tank. Mounting is accomplished on subplates with the ISO 4401-08-08-0-05 porting pattern.
An electrical connection compliant with DIN EN 175301-803 K4 mates the solenoid to standard cable plugs, while a concealed N9 manual override permits direct spool actuation during service work. A built-in pressure reducing valve caps secondary pressure at 45 bar to safeguard pilot components, and a throttle insert with a 0.8 mm orifice (B08) tempers pilot flow for smoother shifting. The main stage handles flow rates up to 450 l/min, supporting large displacement cylinders and motors. Pilot control operates reliably between 12.5 bar and 210 bar, covering both low and high pilot supply conditions. Together, these features enable precise, high-capacity direction control in demanding hydraulic machinery.
Technical Specifications
Actuation
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Maximum Flow
450 l/min
Maximum Operating Pressure
350 bar
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure
12.5 bar
Nominal Size
NG25
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve Secondary Pressure
45 bar
Spool Positions
3
Spool Type
E
Throttle Insert
Ø 0.8 mm (B08)
Way Configuration
4-Way
1620 Old Apex Road
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