Bosch Rexroth | 4WEH16J7X6EW110N9TK4
4WEH16J7X/6EW110N9TK4
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The 4WEH16J7X/6EW110N9TK4 valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. Designed for hydraulic automation, it shifts a J-symbol spool to route pressure and return lines in power units and machine tools. The body is classified as size NG16 and bolts to a subplate that follows the ISO 4401 interface, so installation aligns with common manifold layouts. With the J spool in place, the valve accommodates up to 300 l/min at ports P, A, and B, while the housing endures operating pressures to 280 bar. Control energy comes from an external pilot source connected at port X; this circuit may reach 250 bar but must supply at least 14 bar to overcome the spring-centering force. Each shift displaces 5.72 cm³ of pilot oil, and a concealed N9 manual override allows technicians to move the spool when electrical power is unavailable.
Electrical actuation is provided through a DIN EN 175301-803 type K4 plug, enabling standardized cable assemblies to energize the two solenoids. After actuation, pilot fluid drains internally through port T, and this return path is permitted to rise to 160 bar without impairing function; the internal arrangement eliminates a separate drain line and simplifies plumbing. The hydraulic medium should be filtered to ISO 4406 class 20/18/15 to preserve spool fit and seal life, reducing the chance of sticking during high-cycle duty. The fully equipped unit with two solenoids and a centering spring weighs 8.9 kg, which supports direct mounting on medium-sized manifolds without additional brackets. For reliability calculations, the mean time to dangerous failure is assessed at 100 years, allowing the valve to be included in safety-related circuits that demand long service intervals.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow (symbol J, Ng16)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Oil Return Pressure (ac)
160 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Interface
ISO 4401
Mttfd
100 years
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Volume For Switching
5.72 cm3
Size
NG16
Spool Symbol
J
Weight (two Solenoids, Spring-centered)
8.9 kg
1620 Old Apex Road
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