Bosch Rexroth | 4WEH16J7X6EG24N9TS2K4
4WEH16J7X/6EG24N9TS2K4
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The 4WEH16J7X/6EG24N9TS2K4 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for controlling flow paths in automated hydraulic circuits. Its nominal size NG16 defines the cross-sectional capacity within the valve body. A maximum flow of 300 l/min for spool J sets the throughput capacity for connected actuators. The maximum operating pressure of 280 bar on ports P, A, and B establishes the safe limit for line pressure during continuous duty. External pilot oil supply through port X enables actuation independent of main line pressure, while internal return via T routes pilot fluid back without extra piping. Switching time adjustment marked S2 (Discharge) provides a means to fine-tune spool shift speed, and the dedicated adjuster adds 0.8 kg to the assembly mass. The standardized porting pattern ISO 4401-07-07-0-05 ensures drop-in mounting on compatible manifolds.
The pilot stage tolerates up to 250 bar, so control pressure can remain high even when the main circuit is unloaded. Pilot return pressure is limited to 210 bar in DC operation to protect the housing and seals. Reliable shifting of the spring-centered three-position spool begins at a minimum pilot pressure of 14 bar, and the 5.72 cm³ pilot volume determines the oil needed for each stroke. Electrical termination follows DIN EN 175301-803 form K4, giving a plug-in connection that matches standard industrial cable sets. Hydraulic cleanliness must stay at ISO 4406 (c) 20/18/15 to prevent wear on the spool. The complete valve with two solenoids and its centering spring weighs 8.9 kg, a factor to consider for manifold loading and service handling. A calculated mean time to dangerous failure of 100 years supports long service intervals in safety-related installations.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (ng16, Spool J)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y Internal)
210 bar (DC)
Min Pilot Pressure (3-position Spring)
14 bar
Mttfd (type Weh)
100 years
Nominal Size
NG16
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Volume (3-position Spring)
5.72 cm³
Porting Pattern
ISO 4401-07-07-0-05
Switching Time Adjuster Weight
0.8 kg
Switching Time Adjustment
S2 (Discharge)
Weight (2 Solenoids, Spring-centered)
8.9 kg
1620 Old Apex Road
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