Bosch Rexroth | 4WEH16J7X6EG24N9SK4
4WEH16J7X/6EG24N9SK4
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The 4WEH16J7X/6EG24N9SK4 valve is manufactured by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. Designed for hydraulic automation, it directs pressure and return lines to actuator ports under electro-hydraulic control. Actuation is electro-hydraulic, so an electrical signal drives a pilot stage that shifts the main spool. The NG16 size defines passage dimensions appropriate for medium-flow circuits, while spool symbol J outlines the internal land arrangement used to establish the required flow pattern. A maximum flow rating of 300 l/min allows the unit to handle high throughput without excessive pressure drop. The mounting interface follows ISO 4401-07-07-0-05, permitting stack or manifold installation with standard port geometry. A 24 V DC nominal voltage energizes the solenoid pilot, and switching time can be adjusted by the S option to match the response demanded by motion cycles.
External pilot supply at port x feeds the pilot stage independently of main line pressure, and an external pilot return at port y directs spent fluid to tank outside the valve body. A concealed manual override coded N9 lets maintenance staff shift the spool mechanically when power is unavailable. The valve tolerates 280 bar on ports p, a, and b, while port T can accept up to 250 bar, aligning with heavy-duty mobile or industrial systems. Pilot circuitry may be charged to 250 bar and can return up to 210 bar through port y. Spring-centered versions require a minimum pilot pressure of 14 bar to initiate movement, and each cycle displaces 5.72 cm³ of pilot oil. These pressure and volume figures define the force balance acting on the spool and help designers size the supply lines and accumulators for reliable directional control.
Technical Specifications
Actuation
Electro-Hydraulic
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return (y) Pressure (dc)
210 bar
Max Port T Pressure
250 bar
Min Pilot Pressure (3-pos Spring)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Nominal Voltage
24 V DC
Pilot Return (y)
External
Pilot Supply (x)
External
Pilot Volume (spring-centered)
5.72 cm³
Size
NG16
Spool Symbol
J
Switching Time Adjustment
S
1620 Old Apex Road
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