Diaphragm pressure switch 700 series

differentialNPT 1/2NPT 1/4

The Series 700 Pressure and Differential Pressure switches offer accurate, reliable switching in a robust cast enclosure. • HIGH OVERLOAD RATINGS • SIMPLE MAINTENANCE • SAFETY VENT RING These switches provide excellent repeatability and long in-service life, under both continuous cycling and overload conditions, due to the mechanical restriction of diaphragm travel. A standard feature of the design is the inclusion of a venting and isolation chamber which (in the unlikely event of the process diaphragm failure) will prevent the process entering the switching enclosure. The setpoint of the switch is adjusted by means of a capstan head screw, located within the lower section of the enclosure. Series 700 pneumatic output switches make extensive use of the HNL precision pilot valve (PPV) as the prime sensing device to detect the process diaphragm movement. This valve provides a final switching differential equal to that obtained by the use of a sensitive electrical microswitch.