How to Select the Switching Mode of a Solenoid Valve?

Select the solenoid valve switching mode based on the required control function for a double-acting cylinder:

1. 2-Position, Single-Coil
    Returns to original (spring-return) position when de-energized.

2. 2-Position, Double-Coil
    Spool shifts to the side with power applied; retains position when unpowered (“memory” function).

3. 3-Position, Closed Center (Double-Coil)
    When unpowered, spool centers and blocks all ports. Powering either coil shifts spool to that side.

4. 3-Position, Exhaust Center (Double-Coil)
    When unpowered, spool centers: supply blocked, cylinder ports vented to atmosphere. Powering either coil shifts spool accordingly.

5. 3-Position, Pressure Center (Double-Coil)
    When unpowered, spool centers: supply connected to both cylinder ports (holds load). Powering either coil shifts spool to that side.