Fluorine-lined ball valve
use site and temperature and pressure range 1. Fluorine-lined ball valve use site Fluorine-plastic anti-corrosion valve has been widely used in petroleum, chemical, pharmaceutical, metallurgy, electric power and other industries in contact with strong corrosive media such as acid and alkali. But how to choose and use fluorine plastic lined valve well, according to our customers' experience in field application for many years, we should conduct on-site investigation on several conditions of use such as medium temperature, pressure and pressure difference when selecting fluorine plastic anti-corrosion valve. 2. Operating temperature and pressure of fluorine-lined ball valves The temperature can reach 150 °C in a short time, and the temperature should be controlled within 120 °C for a long time. Otherwise, the F46 lining of each part of the valve is easy to soften and deform, resulting in the valve not closing and the leakage is large. If the temperature of the medium used is below 180 °C for a short time and below 150 °C for a long time, another fluoroplastic—PFA can be used, but the price of the fluoroplastic lined with PFA is more expensive than that of F46. . 2. Do not have negative pressure. Fluoroplastic-lined valves should avoid negative pressure in the pipelines used. If there is negative pressure, it is easy to cause the fluoroplastic-lined layer of the valve cavity to be sucked out (bulged) and shelled, resulting in failure of the valve to open and close. 3. The pressure and differential pressure should be controlled within the allowable range. Especially the fluorine-plastic-lined regulating valve and globe valve
sealed by bellows. Because the bellows is made of tetrafluoro material, the pressure and pressure difference are large, which can easily lead to the rupture of the bellows. The fluorine-plastic-lined regulating valve sealed by the bellows can be changed to PTFE packing seal if the pressure and pressure difference are large.
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