User Guide
3
With a pilot-operated valve, there is a minimum operating-pressure differential
(minOPD) required for the piston to stay open. If the valve is oversized for the
application, then the minOPD may not be achieved, resulting in a valve that
will not open or will fail to stay open.
Risk of oversized
pilot-operated valve
Figure 3 shows the parts of a pilot-operated solenoid valve.
Diagram of pilot-operated
solenoid valve
Pilot
Plunger
Enclosing tube
Top plug
Piston
Main port
Pilot Operated
Figure 3