Vane Type Water Flow Switch

The model wfdnft is a vane type water flow detector for use in wet pipe fire sprinkler systems only.

Vane type water flow switch.

Vane type water flow switches are used to generate a fire alarm signal based on a water flow discharge event from a wet pipe fire sprinkler system. Vane or paddle type flow switches work in wet pipe systems only. Schedules 5 through 40. Flow switches vsr s vane type waterflow alarm switch with retard for small pipe the model vsr s is a vane type waterfl ow switch for use on wet sprinkler systems that use 1 25mm 1 32mm 1 38mm or 2 50mm pipe size.

Delay units are available to prev. The basics of water flow switches. The model vsr is a vane type waterflowswitch for use on wet sprinkler systems. The vsr may also be used as a sectional water flow detector on large systems.

It is ul listed and fm approved for use on steel pipe. The potter vsr series is the industry standard for flow switches for fire sprinkler systems and is compatible with the widest range of. The unit contains two single pole double throw snap action switches and an adjustable instantly recycling pneumatic. Vane type water flow detectors shall not be used as the sole initiating device in both deluge and preaction systems.

They are used in sprinkler system to transmit electrical information due to the flow when a sprinkler head gets activated. The model vsr s is a vane type waterflow switch for use on wet sprinkler systems that use 1 25mm 1 32mm 1 38mm or 2 50mm pipe size. The unit may also be used as a sectional waterflow detector on large systems. Water flow detec tors used in these types of systems may result in an unintended discharge caused by a surge trapped air or a.

As the flow causes the flapper to deflect the magnet moves closer to or further away from the switch causing the reed switch to actuate. Lpc approved sizes are 2 thru 8 50 mm thru 200 mm. Models available for pipe sizes 2 through 10. These devices sometimes fail and often they are incorrectly installed maintained or tampered with.

These devices are tested at least annually sometimes quarterly. It is ul listed for use on a steel pipe. Instrumentation products flow measurement flow switch vane type ask price flow switch is the target type unit that works on the magnetic principle of attraction. The model vsr is a vane type water flow switch for use on wet sprinkler systems.

A minimum flow of 10 gpm 38 lpm is required to activate this device. Removal of waterflow switch to prevent accidental water damage all control valves should be shut tight and the system. As the name stipulates they feature a vane or paddle that sits in the path of water and moves when it flows. But in dry systems where water quickly replaces compressed air when sprinklers activate that paddle could be damaged or broken off.