Bosch Rexroth | 4WEH16C7X6EW110N9DAL
4WEH16C7X/6EW110N9DAL
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The 4WEH16C7X/6EW110N9DAL valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated systems. It uses electro-hydraulic actuation to convert electrical pilot signals into spool movement. The nominal size is NG16, establishing port dimensions that fit medium-capacity circuits. Spool symbol C defines the internal flow paths selected by the operator. Two spool positions let the circuit alternate between two discrete states. A spring returns the main valve to its end position when pilot pressure is removed. The assembly withstands operating pressures up to 280 bar on ports P, A, and B. A maximum flow of 300 l/min can pass through the body without excessive drop when the C-spool is installed.
Pilot control is handled by a high-power 4WE 6E valve that shifts the main stage under load. The pilot circuit can be pressurized to 250 bar, and the external drain on port T is also rated for 250 bar to allow remote tank return. A minimum pilot pressure of 14 bar is required to move the two-spool spring design. Installation uses the ISO 4401-07-07-0-05 interface, which matches standard NG16 subplates. A concealed manual override provides local actuation without exposing moving parts. Acceptable fluid viscosities range from 2.8 mm²/s to 500 mm²/s, covering most common hydraulic oils. System cleanliness must stay at 20/18/15 per ISO 4406 so the spool and housing remain free of abrasive debris.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Main Valve End Position
Spring
Manual Override
Concealed
Max Flow (symbol C, Ng16)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Port T Pressure (y External)
250 bar
Min Pilot Pressure (2‑spool Spring)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Control Valve
4WE 6E (High‑Power)
Spool Positions
2
Spool Symbol
C
Viscosity Range
2.8 to 500 mm²/s
1620 Old Apex Road
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