Bosch Rexroth | 4WEH16E7X6EW110N9TDA
4WEH16E7X/6EW110N9TDA
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The 4WEH16E7X/6EW110N9TDA directional valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and is applied to route pressurized oil in automated hydraulic systems. The nominal size NG16 sets the port geometry so the valve fits standard manifold patterns. A maximum flow capacity of 300 l/min in the three-spool configuration permits rapid actuator movement in medium-frame machinery. Switching is driven by a high-power 4WE 6E pilot valve; this pilot arrangement needs 35 l/min to achieve the shortest shift time, and it displaces a pilot volume of 5.72 cm³ when the spring-centered spool moves. The circuit must supply at least 14 bar pilot pressure to overcome spring forces, while allowable pilot pressure peaks reach 250 bar. Oil cleanliness must meet ISO 4406 (c) 20/18/15 to limit particulate wear on the precision-ground spool lands and spool bore.
For the service ports p, a, and b the housing tolerates 280 bar, enabling the valve to operate in high-pressure power units; the t return port is limited to 250 bar, and the separate pilot return ports Y and Ac are restricted to 160 bar to protect the internal seals. Mechanical installation follows the ISO 4401-07-07-0-05 interface so the body aligns with common subplates. Fastening uses four M10 × 60 and two M6 × 60 screws specified under ISO 4762, and each M10 screw requires a tightening torque of 58 Nm to secure the valve against leakage. A concealed manual override designated N9 is present, allowing technicians to shift the spool during commissioning without exposing the pilot core. The two-solenoid, spring-centered assembly weighs 8.9 kg, a factor to consider when sizing support brackets inside the manifold block.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Manual Override
Concealed (N9)
Max Flow (ng16, 3-spool)
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (p/a/b)
280 bar
Max Pressure (pilot Return Y, Ac)
160 bar
Max Pressure (t Port)
250 bar
Min Pilot Pressure (3-spool Spring-centered)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screws
4x M10 x 60 + 2x M6 x 60 (ISO 4762)
Pilot Flow For Shortest Switching
35 l/min
Pilot Valve Type
4WE 6E (High-Power)
Pilot Volume (3-spool Spring-centered)
5.72 cm3
Screw Torque (m10)
58 Nm
Size
NG16
Weight (two Solenoids, Spring-centered)
8.9 kg
1620 Old Apex Road
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