Bosch Rexroth | 4WEH16EB7X6EW110N9K4
4WEH16EB7X/6EW110N9K4
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The 4WEH16EB7X/6EW110N9K4 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and controls hydraulic flow through electro-hydraulic actuation. It is built to NG16 dimensions, and a centered three-position spool can pass up to 300 l/min. Working ports P, A, and B tolerate 280 bar, enabling high-pressure cylinder control. The spring-centered mechanism shifts when at least 14 bar pilot pressure is available, and each switch requires 5.72 cm³ of pilot oil. These values align the unit with automated motion tasks that need consistent response under demanding flow and pressure conditions.
The valve mounts on subplates that follow ISO 4401-07-07-0-05 and is secured by four M10 × 60 screws. Solenoid power is delivered through a DIN EN 175301-803 connector, and a concealed N9 manual override provides local operation during maintenance. Pilot supply can reach 250 bar, the external pilot return line withstands 160 bar, and port T is rated for 250 bar. Oil cleanliness must meet ISO 4406 class 20/18/15 to protect spool clearances. A calculated MTTFd of 100 years under EN ISO 13849 supports long service life in safety-related circuits. These mounting, connection, and pressure limits combine to make the valve a reliable element in hydraulic automation.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed (N9)
Max Flow (ng16, 3-spool Centered)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Pattern
ISO 4401-07-07-0-05
Mounting Screws
M10 x 60 (4x)
Mttfd (en Iso 13849)
100 years
Nominal Size
NG16
Pilot Return Max Pressure (y, External, Ac)
160 bar
Pilot Volume Per Switch (spring-centered)
5.72 cm3
1620 Old Apex Road
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