Advantages and disadvantages of choosing a rotameter with PTFE float

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The rotameter is a commonly used industrial flow measurement instrument used to measure the flow rate of fluid media. In rotameter, floats made of different materials can be used to indicate the flow rate. Rotameters using polytetrafluoroethylene (PTFE) floats have their unique advantages and disadvantages.

PTFE is an excellent polymer material with good chemical stability and corrosion resistance. This makes the PTFE float resistant to various acids, alkalis, solvents and corrosive media, making it suitable for a wide range of industrial applications. In addition, PTFE has a low friction coefficient and good self-lubricating properties, allowing the float to move freely in the fluid, reducing measurement errors and extending the service life of the measuring instrument.

The manufacturing process of PTFE float is relatively simple and the cost is low. PTFE is an easy-to-process material that can be manufactured into floats of the desired shape and size through injection molding, machining, etc. Compared with floats made of other materials, the use of PTFE floats can reduce manufacturing costs and improve the economy of the instrument. It is especially suitable for mass production and widespread applications.

However, there are some disadvantages to PTFE floats that need to be considered. First of all, PTFE is a relatively brittle material and may crack or deform under some high-pressure, high-temperature or strong impact conditions. Therefore, when selecting a PTFE float, it is necessary to make a reasonable match based on specific process parameters and working conditions to ensure its stable and reliable operation. In addition, the density of the PTFE float is low, which may be affected by the viscosity of the fluid and the mass of the float, resulting in larger measurement errors. Therefore, when using a rotor flowmeter with a PTFE float, the design and parameters of the float need to be carefully considered and calibrated.