Fluorine plastic anticorrosive pneumatic valve application in several problems should be paid attention to

fluorine plastic anticorrosive pneumatic valve in the petroleum, chemical industry, medicine, metallurgy, electric power industries strong corrosive medium such as acid-base contact device has been widely used, but on how to choose the right, with good lining fluorine plastic pneumatic valve, according to our customers for many years field application experience, transform fluorine plastic anti-corrosion pneumatic valve selection to medium temperature, pressure, pressure several matters needing attention conditions as follows:
1, lining fluorine plastic pneumatic valve using medium temperature: my company's all kinds of rubber fluorine plastic pneumatic valve, the fluorine plastic is f ( 聚全氟乙丙烯) And use the medium temperature cannot exceed ℃ ( Medium to ℃ temperatures for short periods of time, for a long period of time using temperature should be controlled within ℃) Pneumatic valve parts, otherwise, the line of f softening, deformation, the pneumatic valve closed tightly, big leakage.
if the use of medium temperature under ℃ temperatures for short periods of time, temperature under ℃ for a long time, can choose another kind of fluorine plastic - Pfa, but the pfa lining fluorine plastic than lining f some more expensive in price.
, don't be negative pressure. Lining fluorine plastic should avoid to use of pipeline in negative pressure pneumatic valve, if there is a negative pressure, easy to cause the pneumatic valve lumen lining of fluorine plastic layer sucked out ( Drum out) , shells, which leads to the pneumatic valves open and close down.
, pressure, differential pressure should be controlled within the scope of the permit. Especially bellows seal rubber fluorine plastic pneumatic valve, globe pneumatic valve adjustment. Because of corrugated pipe is made of four fluorine material, pressure, differential pressure big, easy to cause the corrugated pipe burst.
bellows sealed rubber fluorine plastic regulating pneumatic valve, use conditions of pressure and differential pressure big, can be changed to four fluorine packing seal.
, lining fluorine plastic pneumatic valve using medium conditions unfavorable are hard particles, crystallization, impurities and so on, in order to avoid in the operation of the pneumatic valves open and close in torn pneumatic valve core, pneumatic seat of fluorine plastic layer or ptfe bellows. Of medium hard particles, crystallization, impurities, choose, pneumatic valve, pneumatic valve seat can convert hartz alloy.
, lining fluorine plastic regulating the flow of pneumatic valve should be according to needs ( CV value) Correct selection of pneumatic valve size. When choose, should according to the need of traffic ( CV value) Computing technology parameters, such as pneumatic valve should choose the size and the pneumatic valve opening, such as pneumatic valve's size too big, will inevitably make the pneumatic valve in the case of small opening operation for a long time, and a medium pressure, so easy to make pneumatic valve pneumatic valve core, rod caused by the impact of the media and make the pneumatic valve vibration, pneumatic valve core rod under the impact of the media for a long time, may even make pneumatic valve rod breaking.
the user choose all kinds of fluorine plastic lining pneumatic valves, should as far as possible to understand and master the use of technical conditions, in order to choose the right, with a good, improve the service life of pneumatic valve. When meeting exceed the scope of use of technical conditions, shall be made to the factory and joint consultation, take corresponding countermeasures to solve.