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Recent Posts

Limit Switch

 

The limit switches is a transducer which converts a mechanical position contact into electrical switching contact. Limit switches may also be called as micro switches. The main function of a limit switch in a control valve is for sensing the ON –OFF position of a valve system remotely. The limit switch is attached to a control valve as shown belowmech limit switch

The limit switch is attached to the actuator yoke by a suitable bracket at a required position. The lever connected to the stem will touch the limit switch roller that will make a change in the switching contact either NO or NC. This change in contact can be utilized for alarming, controlling, remote indication etc. Limit switches can be

Mechanical limit switches

Proximity limit switches working on electro-magnetic induction

Inductive or capacitive type limit switches

Photo electric limit switches

 

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