Bosch Rexroth | 4WEH16EA7X6EG24N9K4
4WEH16EA7X/6EG24N9K4
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The 4WEH16EA7X/6EG24N9K4 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and directs hydraulic flow in automated equipment. Size NG16 dictates the mounting face and passage area, while the porting pattern ISO 4401-07-07-0-05 keeps the unit interchangeable with standard subplates. A maximum operating pressure of 280 bar supports high-pressure circuits, and a permitted flow of 300 l/min handles large volume transfer when the pilot feed is external. Pilot oil enters through port X so the control stage can be supplied independently of the main line, and it exits by port Y to prevent back pressure at the cover. The solenoid coil works on 24 V DC, and the DIN EN 175301-803 K4 plug offers quick electrical hookup. A concealed manual override labeled N9 lets technicians shift the spool during testing without exposing the mechanism.
An ambient temperature span from –20 °C to +50 °C allows installation in cold yards or warm production halls, and fluid cleanliness must reach ISO 4406 (c) 20/18/15 to avoid spool scoring. The pilot stage tolerates up to 250 bar so it can drive the main element even in stiff systems, and it returns oil against back pressures as high as 210 bar without malfunction. Reliable actuation requires at least 14 bar pilot feed, giving the springs enough force to recenter the spool after each command. A pilot volume of 5.72 cm³ in the three-position spring-centered design defines the charge that must move for every shift, affecting overall response time. These limits set clear boundaries for circuit designers and help the valve maintain predictable switching behavior in industrial automation.
Technical Specifications
Ambient Temp Max (nbr)
+50 °C
Ambient Temp Min (nbr)
-20 °C
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (e, X External)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y, Dc)
210 bar
Min Pilot Pressure (spring-centered)
14 bar
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Volume (3-spool Spring-centered)
5.72 cm³
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Solenoid Voltage
24 V DC
1620 Old Apex Road
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