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2. General product information
2.1 Description
Magnetically activated vane type flow switches for monitoring gas or liquid flow rates are present
in most industrial applications.
The flow switches can be equipped with electrical contacts, SPDT or DPDT micro switches along with
different protective housings and with optional two-colour visual indicator to suit most environmental
and safety conditions.
2.1.1 Applications
- Protects pumps, motors and other equipment against low or no flow
- Controls sequential operation of pumps
- Automatically starts auxiliary pumps and engines
- Stops liquid cooled engines, machines and processing when coolant flow is interrupted
- Shuts down burner when air flow through heating coil fails
2.1.2 Operating principle
Two oscillating magnets on the same axis, one integral with the vane and one integral with the elec
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trical equipment, repel each other reciprocally through a non-magnetic material flange. The flange
separates the housing, containing the electrical equipment, from the vane that is inserted in the pipe.
The vane in absence of flow is maintained in its resting position by balance weight and repulsion
between the two magnets that face each other with the same polarity. When the flow pushes the
vane, the integral vane magnet moves and the magnetic field pushes the integral switch magnet.
The switching of the electrical contact is quick and reliable.
2.1.3 Mounting
The Flu flow switches can be installed horizontally, directly into a pipe, or in a dedicated chamber
connected between two pipes. Several type of flanges are available upon customer request.