Bosch Rexroth | 4WEH16G7X6EW110N9TK4
4WEH16G7X/6EW110N9TK4
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The 4WEH16G7X/6EW110N9TK4 directional valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth. Designed for electro-hydraulic actuation, it directs flow in automated hydraulic circuits where rapid switching is required. The valve uses a 4-way configuration to control two service ports while its NG16 size matches medium-capacity manifolds. A spring return centers the main spool when the solenoids are de-energized, restoring the system to neutral without external assistance. The rated flow of 190 l/min at 350 bar for symbol G lets the valve handle substantial throughput in power units. Channels p, a, and b can withstand operating pressures up to 280 bar, giving headroom for high-pressure pumps. Pilot oil is supplied through external port X and is discharged internally through port T, simplifying piping on the manifold. Installation follows the ISO 4401-07-07-0-05 interface so the unit can replace other NG16 valves without block modifications.
Electrical hookup is provided by a DIN EN 175301-803 connector, enabling quick coil replacement during maintenance, and the standardized plug orientation permits pre-assembled harnesses to be reused across multiple valves. A fluid cleanliness level of 20/18/15 according to ISO 4406 must be maintained to protect the precision-ground spool from wear. The pilot stage tolerates pressures up to 250 bar, and external actuation requires a minimum of 14 bar when the valve is arranged in three-position mode. Four M10 x 60 screws secure the body to the subplate, and each fastener must be tightened to 58 Nm to preserve the gasket load throughout duty cycles. Functional safety is supported by a mean time to dangerous failure of 100 years, allowing the component to remain in service for decades before statistical replacement is needed. Together, these electrical, hydraulic, and mechanical limits define predictable behavior when the valve is embedded in automated machinery.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Electrical Connector
DIN EN 175301-803
Main Spool Return
Spring Return
Max Flow (symbol G, 350 Bar)
190 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (x External, 3-pos)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screws (ng16)
4 x M10 x 60
Mttfd
100 years
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Size
NG16
Tightening Torque (m10 Screws)
58 Nm
Way Version
4-Way
1620 Old Apex Road
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