Working Principle:
When the system pressure increases to the rated pressure, the snap disc in the sensor will snap and push the lock-in disc to the locked position through the transfer rod, at the same time the lock-in disc can cut-off the switch through the transfer pin. When the pressure is decreased, the snap disc will automatically reset, but the lock-in disc is in the locked position and can not automatically reset. Only when the button is pushed by external force, the lock-in disc will reset and cut-in the switch to recover the system to the normal working state.

Application:
This series products are widely used in various types of air-conditioning,refrigeration systems and equipment with special pressure protection requirement. It can be install on the pipeline or panel based on the design requirement.

Specification:
1.Working pressure range: 0.01-55bar（0.001~5.5MPa）
2.Burst pressure: >35MPa
3.Ambient temperature: -30℃~+80℃
4.Medium temperature: -50℃~+120℃
5.Cycle life : 10,000 cycles
6.Electrical rating: AC120V/240V,375VA；AC/DC36V,3A；AC120V,6FLA,36LRA；AC240V,3FLA,15LRA
7.Dielectric strength: AC700V/S between T-T.  AC2000V/S between T-C
8.Switch configuration: SPST(normally-closed), Manual-reset
9.Electrical connection:  6.35×0.8mm QC, or others wire lead
10.Fitting:NPT1/8"，G1/8"，NPT1/4"，G1/4"，7/16-20UNF，1/4" tube etc,or customized by your requirement. Connection material can be use brass or stainless steel