Bosch Rexroth | 4WEH16E7X6EW110N9DAL
4WEH16E7X/6EW110N9DAL
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The 4WEH16E7X/6EW110N9DAL valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and serves to shift hydraulic flow paths in automated circuits. It employs electro-hydraulic actuation so a solenoid-driven pilot stage moves the main spool, enabling remote control from machine controllers. The unit is built in nominal size NG16 and features a 4/3-way directional function with the spool configuration designated as symbol E, giving three stable positions for supply, actuator, and tank lines. With the High-Power 6E pilot control valve attached, the main stage can accommodate a maximum flow of 300 l/min when mounted on a subplate interface. Connection geometry follows the ISO 4401-07-07-0-05 porting pattern, simplifying interchange with other NG16 components. The internal passages are sealed with NBR elastomers to contain mineral oil media, and the housing is rated to receive oil that meets cleanliness class ISO 4406(c) 20/18/15 to maintain spool and seat life.
System pressure limits are set so ports P, A, and B may reach 280 bar during normal service, while the pilot stage can be supplied up to 250 bar without damage. The return path for the pilot oil differs by supply type, allowing 160 bar for alternating-current solenoids and 210 bar for direct-current versions. Port T shares the 250 bar ceiling to match the pilot supply. For reliable centering of the three-position spring-loaded spool, a minimum pilot pressure of 14 bar is required before actuation begins. These limits let designers size pumps and accumulators accurately and avoid sluggish shifting. The combination of electro-hydraulic drive and the stated pressure ratings ensures quick response in presses, molding machines, and other automated equipment that depend on repeatable flow direction.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406(c) 20/18/15
Directional Function
4/3-Way
Max Flow (ng16, Symbol E)
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 (3-pos Spring-centered)
14 bar
Mounting
Subplate
Nominal Size
NG16
Pilot Control Valve
High-Power (6E)
Pilot Return (y) Max Pressure (ac)
160 bar
Pilot Return (y) Max Pressure (dc)
210 bar
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
NBR
Spool Symbol
E
1620 Old Apex Road
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