Flow Switches

Malema Flow Switches FAQ

• How do flow switches work?

  A flow switch is a device used to detect whether a fluid (liquid or gas) is flowing through a pipe, duct, or channel, and to trigger an electrical signal when flow exceeds or drops below a set level. 

  Flow switches detect the presence or absence of flow and trigger an action, such as turning a pump on/off or sounding an alarm. Flow switches typically use a magnetic piston, shuttle or  vane that reacts when flow exceeds or drops below a set threshold.

• What are the different types of flow switches?

  Flow switches are available in the following types:

  • Adjustable set point flow switches allow operators to set a specific flow rate at which the switch activates, providing flexibility for changing process conditions.
  • Fixed set point flow switches activate at a predetermined flow rate that cannot be adjusted, offering a simple, reliable solution for consistent applications.
  • Explosion-proof flow switches are designed for hazardous environments where flammable gases or liquids are present. These switches prevent sparks and ensure safe operation.

• Do flow switches require maintenance?

  Mechanical switches may require periodic cleaning or calibration, especially in applications with debris or corrosive fluids.

• What factors should be considered when selecting a flow switch?

  Consider fluid type, flow rate, desired set point, pipe size, pressure, temperature, electrical requirements and whether the application needs to detect if the flow exceeds or drops below the set point.