Bosch Rexroth | 4WEH16H7X6EG12N9TK4
4WEH16H7X/6EG12N9TK4
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The 4WEH16H7X/6EG12N9TK4 directional spool valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth. It is an electro-hydraulic unit that directs pressurized flow for automated hydraulic motion. The valve offers a 4-way function, allowing controlled extension and retraction of cylinders. Its nominal size is NG16, and it mounts on a subplate that follows the ISO 4401-07-07-0-05 interface. A high-power 4WE 6E pilot valve drives the main stage, receiving supply externally through port X and returning internally to port T. After each command the main spool is centered by hydraulic return force, maintaining neutral flow paths when de-energized.
An electrical plug conforming to DIN EN 175301-803 code K4 links the solenoid to the control cabinet, while a concealed N9 manual override permits local switching during setup or emergencies. The valve withstands 280 bar at ports P, A, and B; both the pilot circuit and port T are limited to 250 bar. Clean oil with a cleanliness level of ISO 4406 20/18/15 is required to prevent wear between spool and bore. A mean time to dangerous failure of 100 years for the WEH type supports long-term service in safety-related installations.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Type
Subplate
Mttfd (type Weh)
100 years
Nominal Size
NG16
Pilot Return
Internal (T)
Pilot Supply
External (X)
Pilot Valve Type
4WE 6E (High-Power)
Spool Return (main Valve)
Hydraulic
Valve Function
4-Way
1620 Old Apex Road
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