H20PS series pressure switch
<>Pressure controllers are mainly used in refrigeration cycle systems as a control device for system over-high or low-pressure protection or as a start-stop control device for the cooling system in refrigeration units that is controlled by system pressure. According to its working principle, it can also be used in other industrial control fields such as steam irons, water reservoirs, and other industries that use pressure control. <>Working Principle <> Working Principle of Series Pressure Switches When the pressure of the controlled medium rises to a certain set value, the butterfly-shaped metal diaphragm generates an unstable jump and pushes the push rod to make the switch contacts connected ( or disconnected). When the pressure of the controlled medium drops to another set value, the butterfly-shaped metal diaphragm will suddenly jump back to the original state, causing the switch contacts to open (or connect), thereby realizing the switch's function. <>The working principle of the series pressure switch is slightly different. When the pressure of the controlled medium decreases, the switch cannot automatically reset. The circuit always maintains the converted state. Only when the reset button is pressed by hand, the circuit returns to the original state. <>Technical Parameters < rr="" ="" =""> <> < r="">Serial Number < r="">Item? Item < ="">Parameters <>Low pressure pressure controller <>High pressure pressure controller <> < >Contact capacity < =""> <> <>Up switching pressure value () <>. ＜& <>＜& <> <>Maximum operating pressure<> <>& <>. <> < > <>Air tightness test pressure<> <>. <>. <> <>Membrane box Compressive strength < ="">. No bursting or leakage <> <>Applicable ambient temperature <>-℃ ~ +℃ <>-℃ ～+℃ <> <>Applicable medium temperature <>-℃ ～ +℃ <>-℃ ～+℃ <> <>Contact resistance < ="">& the following (except wires) <> <>Insulation resistance< /> < ="">The distance between the terminal and the shell is not less than & after the damp heat test& <> <>Insulation strength < ="">Able to withstand Can withstand the damp heat test <> <>Salt spray test < ="">After meeting all electrical properties, there is no serious corrosion on the metal part r> <> <> <>Lifetime < ="">times (automatic reset) times (manual reset)
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