Bosch Rexroth | 4WEH16G7X6EW110N9TDAL
4WEH16G7X/6EW110N9TDAL
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The 4WEH16G7X/6EW110N9TDAL directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is intended to route hydraulic flow in automated circuits. It uses electro-hydraulic actuation to shift a 4/3-way spool, allowing remote electrical control of pressure lines. The G spool symbol defines the internal flow paths and works with the nominal size NG16 to accommodate the required port diameters. When the supply reaches 350 bar, the main stage can deliver up to 190 l/min, while ports A and B can withstand a continuous operating pressure of 280 bar. During the shortest switching sequence the pilot stage must receive 35 l/min, and it accepts pilot pressures up to 250 bar without damage.
An external pilot feed on port X must supply at least 14 bar to move the spool, and the pilot return is routed internally through port T to simplify piping. The spring-centered version displaces 5.72 cm³ of pilot oil each cycle, which influences response time and energy use. The valve fastens to a subplate, and its ISO 4401-07-07-0-05 porting pattern keeps it interchangeable with other NG16 devices. With two solenoids and the centering springs installed the assembly weighs 8.9 kg, yet its mean time to dangerous failure is calculated at 100 years for long service life.
Technical Specifications
Actuation
Electro-Hydraulic
Max Flow (symbol G, 350 Bar)
190 l/min
Max Operating Pressure (p, A, B)
280 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (x External)
14 bar
Mounting Type
Subplate
Mttfd
100 years
Nominal Size
NG16
Pilot Flow (shortest Switching)
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Volume (spring-centered)
5.72 cm3
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
G
Way Configuration
4/3-Way
Weight (2 Solenoids, Spring-centered)
8.9 kg
1620 Old Apex Road
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