Bosch Rexroth | 4WEH16HD7X6EG24N9K4
4WEH16HD7X/6EG24N9K4
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The 4WEH16HD7X/6EG24N9K4 valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series and serves to shift hydraulic flow paths in automated machinery. It features a four-way configuration so that pressure, return, and two work ports can be switched between operating states. Electro-hydraulic actuation moves a D-type control spool sized for NG16, while pilot commands are processed through a 6E pilot stage. Coil excitation at 24 V DC energizes the pilot, and pilot oil is supplied externally via port X to isolate control oil from main flow. A concealed manual override allows maintenance personnel to stroke the valve without electrical power, providing service flexibility.
The control spool returns to its neutral position by hydraulic force, eliminating external springs and improving response consistency. Ports P, A, and B tolerate operating pressures up to 280 bar, and the valve passes as much as 250 l/min when the differential across the D-spool reaches that level. Pilot pressure can be as high as 250 bar and must be at least 14 bar to move the spool reliably. Drain port T, when routed externally with port Y, is rated for 250 bar, while the dedicated Y port in a DC mounting is limited to 210 bar. Electrical connection is made through a DIN EN 175301-803 interface, providing standardized pinout and sealing for industrial environments.
Technical Specifications
Actuation Type
Electro-Hydraulic
Coil Voltage
24 VDC
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Flow (d, 280 Bar)
250 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure (port T, Y Ext.)
250 bar
Max Pressure (port Y, Dc)
210 bar
Min Pilot Pressure (hydraulic End)
14 bar
Nominal Size
NG16
Pilot Oil Supply
External (X)
Pilot Valve Code
6E
Spool Type
D
Way Configuration
4-Way
1620 Old Apex Road
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