HED1 PISTON PRESSURE SWITCH

    1、HED 1 series hydraulic-electric pressure switch is a piston type one. 

    It is composed of bowl (1), micro-switch (2), adjusting screw (3), plug (4), piston (5) and spring (6).

    2、It is used for turning on or off a circuit depending on pressure. Controlled pressure is applied on piston (5)which will push plug(4) to overcome changable force of spring (6), plug (4) transfers the displacement of piston(5) to micro-switch (2) so that the circuit could be turned on or off as specified, dog (7) can protect the relay from damage caused by over pressure.

    3、Adjusting change-over pressure

    To adjust charge-over pressure, remove the mark plate firstly and loosen endless screw (9). Then change-over pressure can be set by turning adjusting screw (3) (clockwise rotation increases the pressure). AT last, position adjusting screw (3) again with endless screw (9) and screw the mark plate (8).