Limit switch
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What is a limit switch? What’s the use? Where are limit switches used in chemical production? What is its purpose?
A limit switch, also known as a travel switch, can be installed on relatively stationary objects (such as frames or door frames, referred to as fixed objects) or on moving objects (such as cranes or doors, referred to as moving objects). When the animal approaches the stationary object, the lever of the switch drives its contacts, causing the closed contacts to open or the open contacts to close. The circuit and motor are controlled by changes in the on and off states of the switch contacts.
There are limit switches at both ends of the self-cleaning filter. On the shaft that is driven by the motor to rotate and move longitudinally, there is a disc; when one end of the shaft moves to the point where the disc touches the limit switch, the motor stops rotating, and thus one self-cleaning cycle is completed.
Currently, many control valves are equipped with limiters to ensure safe operation.
What you mean is that the limit switch can be used for controlling the travel of the valve body switch