Sprinkler Flow Switch Operation

Nfpa 13 s requirements address each type of switch in turn.

Sprinkler flow switch operation.

Wet pipe fire sprinkler systems require an alarm check valve a device that prevents water from flowing in the wrong direction and features a flow switch or another listed means of sounding an alarm 16 11 3 1. The flow switch will indicate its location a fire indicator panel but may not call the fire brigade. Water flow switches are implemented in water sprinkler systems. Pressure switches indicate a discharge from a sprinkler.

A water flow detector commonly produced by system sensor is an electro mechanical device designed to send an alarm to a fire alarm panel and or fire department when a continuous flow of water occurs through the fire sprinkler system s piping from an activated sprinkler head or leak in the system. A flow switch will also operate in the affected section of the fire sprinkler system indicating the location of the water flow. Waterflow detectors monitor the flow of water to sprinkler heads. All flow switches should be tested in accordance with tb203 3 2 as part of a mandatory quarterly service routine.

In the case of a fire for example a flow switch can trigger an. Switches used to detect waterflow must cause an audible. For the test to be valid sufficient water must pass the flow switch to activate it equal to one sprinkler head in operation. Supervisory switches help prevent tampering or incorrect setting of valve controls.

All three also come in explosion proof versions for hazardous environments.