DG4M4 Series - Solenoid operated directional control valves - DG4M4-37B-12DC-20-LH-JA

Mounting orientation: Mount no spring type valves so spool axis is horizontal. There are no mounting attitude restrictions for other spool/spring arrangements.

Solenoid energization:  Always insure that one side solenoid is deenergized before energizing the opposite side solenoid. For no spring type valves, one side solenoid should always be energized continuously.

T (tank) port piping: Prevent abnormal pressure surges above the allowable back pressure rating from being generated in T port. Valve is wet armature type so insure that valve is always filled with oil.

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.

Using valves as two-way and three-way: Valve is designed as four-way and as such max. flow is limited when using as 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.

Manual operation: Valve is solenoid "pull" type. For manual switching, push the manual override pin on the opposite side. This differs from "push" type solenoid switching valves. Also as shown in graph below, required 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.