Bosch Rexroth | 4WEH16K7X6EW110N9DAL
4WEH16K7X/6EW110N9DAL
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The 4WEH16K7X/6EW110N9DAL valve is manufactured by Bosch Rexroth in the WEH Directional Spool Valves series. It uses electro-hydraulic actuation to route pressure fluid in automated hydraulic circuits. The nominal size is NG16, and the K-type spool passes 210 l/min at 350 bar. Maximum flow for this size reaches 300 l/min, while ports P, A, and B tolerate up to 280 bar. Installation follows the ISO 4401-07-07-0-05 interface. A concealed manual override (code N9) allows local shifting when electrical power is unavailable. Fastest switching requires a pilot flow of 35 l/min, and the assembly with one solenoid weighs 8.5 kg.
Pilot supply must stay between 14 bar and the 250 bar maximum, ensuring reliable actuation of the control stage. Port T with an external drain accepts up to 250 bar, whereas port Y is limited to 160 bar. Each two-spool shift draws 11.45 cm³ of pilot oil, so tank sizing must accommodate this volume. System cleanliness has to meet ISO 4406 class 20/18/15 to prevent wear on the precision spool. These constraints establish the operational envelope for the valve in presses, injection machines, and other automated equipment requiring consistent directional control.
Technical Specifications
Actuation Type
Electro-Hydraulic (WEH)
Cleanliness Class
ISO 4406 (c) 20/18/15
K-spool Flow @350 Bar
210 l/min
Manual Override
Concealed (N9)
Max Flow (ng16)
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 (ac)
160 bar
Min Pilot Pressure (2-spool Spring)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Flow For Fastest Switch
35 l/min
Pilot Volume Per Switch (2-spool)
11.45 cm3
Spool Type
K
Weight (one Solenoid)
8.5 kg
1620 Old Apex Road
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