How Does a Flow Switch Work?   

jauhar khan
@jauhar123 | Posted 31 Oct. 2019

Flow switches are mechanical devices used in controlling the flow of air, steam, or liquid. A flow switch operates by conveying a trip motion (relay, reed switch, paddle) to another machine within the system, usually a pump. The trip signal will indicate to the pump to turn on or turn off.  It is necessary to provide damage protection and circuit cooling or adjust flow rates that are too high or too low.

Definition of Flow

Flow refers to the velocity or physical movement of gas, steam, or liquid within a pipe that triggers the actuation of the Switzer flow switch for example. . When there is no flow present, the velocity either drops or completely stops; in either case, the switch will revert to its original position.

Flow Switch Uses

A liquid flow switch is applicable in hot water heating, air conditioning, liquid transfer systems, fire sprinkler systems, and industrial laser cooling systems.

What are some of the functions of a flow switch?

Flow switches perform precise functions based on set requirements. They are capable of stopping a motor when there is no flow as well as triggering the same motor to run once the flow starts. It can sound an alarm when the flow arrests, and it can turn off the alarm when the flow rate reaches an appropriate level.