DG4VL-3 Series - Low-holding current solenoid operated directional control valves - DG4VL-3-7BL-M-PK2-H-7-56

Mounting Orientation:

To ensure sure switching of no spring detented type valves, mount valves so the spool axis is horizontal. There are no mounting attitude restrictions for another spool/spring arrangement.

Solenoid energization:

Always insure that one side solenoid is de-energized before energizing the opposite side solenoid. For spring-centered and spring offset valves, the solenoid should be continuously energized during circuit switching. de-energization of the solenoid will cause the spool to return to the prescribed position by spring force. For no spring detented type valves, the spool will be maintained in switched position by the detent but to ensure sure circuit switching, the solenoid should be energized for more than 0.1 seconds.

T (tank) port piping:

Prevent abnormal pressure surges above the allowable back pressure rating from being generated in T port. The valve is a wet armature type so insure that valve is always filled with oil.

Using valves as two-way and three-way:

Valve is designed as four-way and as such max. flow is limited when using two or three-way valves. Consult TOKIMEC for details.

Long periods of solenoid energization:

Care should be paid as long periods of solenoid energization at high pressure may cause spool sticking and switching malfunction.

Malfunctions due to surge pressure:

Avoid combining flows of tank lines prone to surge pressures. Surge pressures in valve T port may lead to spool malfunctions. No spring-detented type valves are susceptible to such malfunctions during de-energization.

Manual operation:

For manual switching, push the manual override pin. Be aware that actuation force increases with higher back pressure.

Solenoid indicator lamp:

For valves with indicator lamps, the lamps will light when current flows to the solenoid.

Conduit box wiring:

The solenoid and conduit box are pre-wired. Refer to the below diagrams for wiring from the power source to the conduit box or DIN connectors.