Bosch Rexroth | H-4WEH16E7X6EG24N9K4B12-CSA
H-4WEH16E7X/6EG24N9K4/B12 CSA
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The H-4WEH16E7X/6EG24N9K4/B12 CSA directional spool valve is produced by Bosch Rexroth as part of the WEH Directional Spool Valves series. It directs pressurized oil to actuators in hydraulic automation systems. The NG16 size provides a flow path suitable for mid-range circuits while allowing installation on manifolds with the ISO 4401-07-07-0-05 interface. An electrical coil rated at 24 V DC energizes the solenoid, and the mating DIN EN 175301-803 K4 connector offers standardized wiring. A concealed manual override lets maintenance staff shift the spool during commissioning or power loss without exposing moving parts. The valve passes up to 300 l/min through symbol E flow paths and withstands 350 bar on ports P, A, and B, meeting common industrial pressure demands. Fluid cleanliness at 20/18/15 per ISO 4406 limits contamination that could score the spool lands, and the complete two-solenoid spring-centered assembly weighs 8.9 kg for stable mounting.
The pilot stage operates between 14 bar minimum and 250 bar maximum so circuit designers can use external pilot supplies without oversizing pumps, while the return port tolerates up to 210 bar when routed externally to port Y. An internal throttle insert with a 1.2 mm orifice damps pressure surges, improving response predictability. NBR seals resist standard mineral oils and simplify service in general-purpose power units. The valve fastens with four M10 × 60 screws, and applying 58 Nm of torque secures the body against the subplate to prevent leakage under cyclic load. Overall, these mounting details, seal selection, and pilot limits ensure reliable spool positioning and repeatable flow direction in high-duty hydraulic machinery.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Coil Voltage (dc)
24 V
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed
Max Flow (symbol E)
300 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Max Return Pressure (y External, Dc)
210 bar
Min Pilot Pressure (x External)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screw Torque
58 Nm
Mounting Screws
M10 x 60
Seal Material
NBR
Size
NG16
Throttle Insert
Ø 1.2 mm
Weight (2-solenoid, Spring-centered)
8.9 kg
1620 Old Apex Road
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