Bosch Rexroth | 4WEH16Y7X6EG24N9S2K4
4WEH16Y7X/6EG24N9S2K4
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The 4WEH16Y7X/6EG24N9S2K4 directional spool valve is produced by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits and is built around the NG16 size so it mounts on 16 mm port plates. The Y spool geometry supports a maximum flow of 300 l/min to accommodate medium to high throughput actuators. Operating ports P, A, and B can be pressurized up to 280 bar, enabling use in high-pressure systems. Pilot control is handled externally; both the pilot oil supply and the pilot oil return are routed outside the main body to keep tank lines clean. The pilot stage withstands up to 250 bar and requires at least 14 bar for reliable shifting when a two-spool, spring-returned configuration is used. A solenoid rated for 24 V DC energizes the pilot circuit and provides electrical actuation.
The valve follows the ISO 4401-07-07-0-05 porting pattern, ensuring interchangeability with standard subplates. Switching time can be tuned through discharge control identified as option S2, which lets the installer adjust actuation speed to match system dynamics. Electrical connection is made through a DIN EN 175301-803 connector coded K4, simplifying wiring in control cabinets. A concealed manual override designated N9 permits local shifting during commissioning without exposing moving parts. Port T can handle 250 bar when the return path is external, while the separate external Y port is limited to 210 bar. Fluid cleanliness must meet ISO 4406 class 20/18/15 to protect the precision spool and bore surfaces. These characteristics complete the hydraulic and electrical data set for the 4WEH16Y7X/6EG24N9S2K4 valve.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (symbol Y)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T (y External)
250 bar
Max Pressure Port Y (external)
210 bar
Min Pilot Pressure (2-spool, Spring End)
14 bar
Pilot Oil Return
External
Pilot Oil Supply
External
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Symbol
Y
Supply Voltage
24 V DC
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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