The use of pneumatic diaphragm valve characteristics

pneumatic diaphragm valve is one of the earliest regulating pneumatic valve, it has the following characteristics:
( ） Soft rubber diaphragm pneumatic valve can cut off the media do not leak.
　（ ） Because of a certain corrosion resistance of the rubber, in front of the s, also no better corrosion resistant material, and it is usually treated as corrosion resistant materials to promote the application of even until today.
　（ ） Simple flow, have 'self-cleaning' effect, can be used to clean medium.
　（ ） Open feature, but as a corrosion resistant regulating pneumatic valve, so we have to use quick opening former part, the characteristic of the short effective stroke, the poor quality of regulation.
　（ ） As a fatigue test pieces, forcing it fold up and down, easy to damage, because the diaphragm is an unreliable parts, lead to pneumatic valve life is short, this is a fatal weakness. Is because of this, the author in recent years are stressed: should be eliminated pneumatic diaphragm valve, pneumatic valve, pneumatic valve fully functional super light with a ball instead.
　（ ） Is closed, the diaphragm upwards crest of medium force, unbalanced force is bigger, need large thrust actuator, therefore, must choose extremely large and bulky, heavy actuators, pneumatic valve weight is very heavy, is pneumatic ball valve of The Times, is a fully functional ultra light of pneumatic valve - Times.
　（ ） Especially need to be emphasized that corrosion resistant material more and more, especially s lining fluorine plastic technology, pneumatic valve fluorine-butterfly ball. Because the fluorine plastic rubber than corrosion resistance, heat resistance, and pneumatic ball valve ball core and far than the pneumatic diaphragm valve diaphragm stiffness ten times as much as one hundred times more, so suggest in cut and regulation of corrosive medium, try not to use pneumatic diaphragm valve, ball of corrosion resistant lining fluorine pneumatic valve, pneumatic butterfly valve and the four fluorine single-seat pneumatic valve. Might as well give an example: in a water treatment system, water desalination device using pneumatic valve, years ago, both foreign and domestic device, all choose the fluorine plastic lining pneumatic diaphragm valve, its long service life for about a year, short ~ months, therefore, continuously in the replacement of the diaphragm. With our recommended after water treatment after special pneumatic ball valve, the problem is well solved, life ~ years, generally can also be used to ~ years.