Pneumatic valve fluorine-butterfly selection

fluorine-butterfly 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 pneumatic valve, according to our customers for many years field application experience, transform fluorine pneumatic valve selection to medium temperature, pressure, pressure several matters needing attention conditions as follows:
. Pneumatic valve fluorine-butterfly conditions unfavorable use medium 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, pneumatic valve seat fluorine-butterfly layer or ptfe bellows. Of medium hard particles, crystallization, impurities, choose, pneumatic valve, pneumatic valve seat can convert hartz alloy.

. Pneumatic valve fluorine-butterfly use medium temperature: my company's all kinds of rubber fluorine 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 line of PFA fluorine plastic than line F some more expensive in price.

. Pressure and differential pressure should be controlled within the scope of the permit. Especially the bellows sealed fluorine-butterfly regulating pneumatic valve, pneumatic valve fluorine-butterfly deadline. Because of corrugated pipe is made of four fluorine material, pressure, differential pressure big, easy to cause the corrugated pipe burst. Bellows seal fluorine-butterfly regulating pneumatic valve, use conditions of pressure and differential pressure big, can be changed to four fluorine packing seal.
. Fluorine-butterfly pneumatic valve should be according to the need of traffic ( Cv value) Correct selection of pneumatic valve size. When choose, should according to the need of traffic ( Cv value) Computing technology parameters, such as lining fluorine 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. Users in the selection of all kinds of pneumatic valve fluorine-butterfly, should as far as possible to understand and master the use of technical conditions, in order to choose the right, with good, improve the service life of pneumatic valve. When meeting outside the range to use technical conditions, shall be made to the manufacturing factory of
and joint consultation, take corresponding countermeasures to solve the
. Don't be negative pressure. Fluorine-butterfly should avoid to use of pipeline in negative pressure pneumatic valve, pneumatic valve lumen if there is a negative pressure, easy to cause the lining fluoride layer sucked out
( Drum out) , shells, which leads to the pneumatic valves open and close down.