They are used in sprinkler system to transmit electrical information due to the flow when a sprinkler head gets activated.
Vane type flow switch working.
This switch can be used to actuate audible or visual alarms as well as relays or other controls.
These vane operated flow no flow switches come with the following advantages easily configurable flow monitoring and control.
These devices are tested at least annually sometimes quarterly.
Lpc approved sizes are 2 thru 8 50 mm thru 200 mm.
Power engineering equipment company peeco flow switches have been made in the usa offered in 3 different series.
In the presence of fluid flow controlled movement of the piston actuates an external hermetically sealed reed switch.
As the name stipulates they feature a vane or paddle that sits in the path of water and moves when it flows.
Applications include steam flow boiler feedwater and fluid flow rates in building water lines.
Designed for use wherever there is an application for a conventional flow orifice plate.
This device has an internal piston which activates the switch.
The vsr may also be used as a sectional water flow detector on large systems.
As the flow drops to preset levels it triggers an internal magnetic mechanical and coupling switch actuation lever which essentially trips the switch.
Flow switch operating principle is based on a free floating magnetic piston which responds only to the motion of fluids within the line not to static or system pressures.
These devices sometimes fail and often they are incorrectly installed maintained or tampered with.
The n series non explosion proof flow switch e series explosion proof flow switch and h series high pressure explosion proof flow switch.
Working principle of flow switch with animation.
As the name stipulates they feature a vane or paddle that sits in the path of water and moves when it flows.
Can be used with gases liquids corrosive and high temperature fluids.
Flowtech vane type flow switches are designed for reliable supervision of liquid flow through pipelines.
It is ul listed and fm approved for use on steel pipe.
Peeco flow switches are simple mechanical devices.
Vane or paddle type flow switches work in wet pipe systems only.
Variable area flow switch.
The model vsr is a vane type water flow switch for use on wet sprinkler systems.
Orifice plate flow meters are differential pressure sensors for flow rate.
Gases and air being sent through the duct will physically move a paddle sitting directly in the air flow channel and this in turn will trigger an action when flow increases or decreases beyond the desired rate.
Peeco flow switch peeco flow switch.
A vane operated flow switch relies on fluid pushing against an internal paddle.
Much like their water paddle flow switch equivalents a paddle air flow switch sometimes known as a vane type switch is a mechanical sensor that partially protrudes into the duct being monitored.
In addition to general environments these flow switches can be used in adverse weather conditions.
