Gas expansion temperature switch F M

capillaryadjustableSPDT

Case: zamak epoxy coated Sensing element: stainless steel or copper bulb and capillary Capillary protection: stainless steel armour Switch: 1 or 2 change over (SPDT) / fix or adjustable deadband Cable gland: nickel plated brass M16 or JUPITER connector Features: » Stainless steel fastening » Reinforced fixing bracket - Navy type Pressure variation (or temperature transformed into pressure in accordance with the saturated pressure law [steam pressure]) is transmitted to sensor "S" which activates an internal mechanism comprising a force-balancing system. The force produced by pressure variation in sensor "S" is balanced by the variation spring. The force applied can be adjusted via a "RS" screw which can be used to set a given operating (or balancing) point. In the event that the balancing point is exceeded the governor arm will move. Any movements will be detected by contact "C" fitted the end of the stroke. Pressure variation that requires the contact to be reset in its initial position is referred to as the “deviation”. The deviation value can be increased by adjusting the variation spring using the wheel labelled"W". Contact trip can only be adjusted upwards. Device services electrical function 34D in the present technical instruction leaflet. Detectors comprise the following: •A unit comprising 1 or 2 gold plated switches and an operating mechanism. •A pressure sensor (process connection M20x1.5 for versions 1 & 2 ; ½" BSP M for version 3)