When the hydraulic system pressure reaches the set value, WMAP pressure switch will produce a connection/disconnection electrical signal.
When the liquid pressure in the system falls to the set value, the initial state of the electrical signal will be re-set.
When the liquid pressure in the system acts on plunger 1 and then through which acts on the base of spring2, the plunger will move forward to micro switch 3 once the set pressure value is reached, making the micro switch connected or disconnected.
The pressure is set by turning the adjusting nut, Clockwise rotation will increase the set pressure.
This pressure switch is suitable for hydraulic systems using hydraulic oil or substance with similar lubricating property.