A flow switch is a device that monitors the flow of air, steam or liquid. It sends a “trip signal” to a different device in the system, such as a pump. The flow switchcan indicate to the pump to shut off or to turn on.A flow switch is a mechanical instrument that is used to control the flow of air, steam or liquid. Flow switches work by sending trip signals to another device (a pump for example) within the system, telling it to shut off or to turn on, which will further protect it from damage and for cooling circuit protection.
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.
A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float.
Uses:
An example of what flow switches can be used for is given by McDonnell & Miller, suppliers of liquid and air flow switches. Liquid flow switches can be used for air conditioning, hot water space heating systems, pump systems, water cooled equipment, blending or additive systems, liquid transfer systems, fire sprinkler systems, water treatment systems, swimming pool chlorination and industrial laser coolant systems. Air flow switches can be used for clean room filter systems, duct type heating, exhaust ventilating, air supply systems and air treatment systems.
Advantages: When the water flow starts, it gives signal to panel and start the alarm.
Disadvantages: It cause some little pressure loss, and it is always used in wet pipe systems.
Connection Type:
Threaded or U bolt
Working Pressure:
400psi ~ 450psi
Working Temperature:
Between 0ºC – 49ºC with water.
Dimensions:
1” – 2” Threaded
2” – 8” U Bolt
Suitable with pipe systems:
– Steel water pipe
– Sch.10 – 40 pipes
Application area:
All wet pipe lines which includes flows like a water.
Approvals:
– UL Listed
– ULc Listed
– FM Approved
