Bosch Rexroth | 4WEH16J7X6EW110N9S2K4B10D3
4WEH16J7X/6EW110N9S2K4/B10D3
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The 4WEH16J7X/6EW110N9S2K4/B10D3 directional spool valve is produced by Bosch Rexroth as part of the WEH Directional Spool Valves series. It routes hydraulic flow to actuators in automation circuits and is intended for remote electrical actuation in machinery. The valve follows NG16 size standards, giving it port dimensions suited to medium-capacity lines. Its mounting face matches the ISO 4401-07-07-0-05 porting pattern so it fits common subplates without modification. A maximum flow of 300 l/min supports rapid cylinder or motor motion, while the P, A, and B ports withstand 280 bar to serve high-pressure systems. When fluid returns through the Y port, pressure must stay below 160 bar to protect downstream components. Hydraulic oil cleanliness must meet ISO 4406 class 20/18/15 to avoid spool wear. Electrical actuation is through a DIN EN 175301-803 connector, and the pilot supply is internal so no separate feed line is required.
The pilot stage tolerates up to 250 bar, allowing it to draw pressure from the main line without damage. Spring-centered versions need a minimum pilot pressure of 14 bar for reliable shifting, and a pilot flow of 35 l/min moves the main spool during switching. Each actuation consumes 5.72 cm³ of pilot oil, a figure used when sizing pumps for fast duty cycles. The spent pilot fluid is returned externally, preventing back-pressure from slowing response. A built-in pressure reducing valve is preset to 45 bar to stabilize the pilot circuit despite main line fluctuations. A throttle insert with a 1.0 mm orifice can be installed to damp pressure surges. The design achieves a mean time to dangerous failure of 100 years, providing the reliability required in safety-related hydraulic automation.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803
Max Pilot Pressure
250 bar
Maximum Flow
300 l/min
Min Pilot Pressure (spring-centered)
14 bar
Mttfd
100 years
P, A, B Port Max Pressure
280 bar
Pilot Flow For Switching
35 l/min
Pilot Oil Return
External
Pilot Oil Supply
Internal
Pilot Volume Per Switch
5.72 cm³
Porting Pattern
ISO 4401-07-07-0-05
Pressure Reducing Valve Setting
45 bar
Size (ng)
16
Throttle Insert
Ø1.0 mm
Y Port Max Pressure (ac)
160 bar
1620 Old Apex Road
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