How should a rotor flow meter be selected

　　The rotor flowmeter is suitable for measuring small flow through the pipe diameter D < 150mm, and can also measure the flow of corrosive media. When in use, the flowmeter must be installed on a vertical pipe section, and the fluid medium passes through the rotor flowmeter from bottom to top. So how should the rotor flowmeter be selected?

　　1. When the measuring medium is corrosive, anti-corrosion rotor flowmeter, anti-corrosion metal tube rotor flowmeter and anti-corrosion glass rotor flowmeter can be used.

　　2. When the measured medium is easy to crystallize or vaporize or has high viscosity, a metal tube rotor flowmeter with a jacket can be used. A heating or cooling medium is passed through the jacket.

　　3. For the local indication of small and medium flow, micro flow, clean, transparent, non-toxic, non-flammable and non-explosive fluid flow with a pressure of less than 1 MPa and a temperature below 100°C, and which has no corrosion or adhesion to glass, a glass rotor flowmeter can be used.

　　4. For the measurement of small flow rate of fluids that are easy to vaporize, condense, toxic, flammable, explosive, and do not contain magnetic substances, fibers and abrasive substances, as well as fluids that are non-corrosive to stainless steel, when local indication or remote signal transmission is required, ordinary metal tube rotor flowmeter can be selected.

　　5. The rotor flowmeter is required to be installed vertically with an inclination of no more than 50. The fluid is mostly from bottom to top. Special metal tube rotor flowmeters can be connected to horizontal pipelines. The installation position should have less vibration and be easy to observe and maintain. Upstream and downstream cut-off valves and bypass valves should be installed. For dirty media, a filter must be installed at the inlet of the flowmeter.