Shallow the application that talks about pneumatic film control valve
From;    Author:Stand originally
The type selecting of pneumatic film control valve
Control valve of film of pneumatic of type selecting of 1.1 basises use requirement is mixed by core of a powerful person body of a powerful person (include valve base) two parts composition, have different configuration by diverse use demand, the pneumatic film control valve that at present limited company of Henan glume young chemical industry uses basically has direct sheet control valve of a powerful person, two-seater and control valve of high-pressured part pattern. Direct sheet leakage rate of a powerful person is minor, the fluid is right odd the unbalance that the thrust place of a core of a powerful person forms is very big, because this is direct odd a powerful person applies to requirement leakage rate around of a powerful person of small, Xiaohe tubal way presses the circumstance with inferior difference. There is fluctuation inside body of a powerful person of direct two-seater a powerful person core of two a powerful person, the thrust way that leaves core of a powerful person at going up as a result of fluid action is opposite and roughly quits; The unbalance of two-seater a powerful person is very so small, allow around of a powerful person to have bigger press difference. But because the route sheds inside body of a powerful person complex, the to body of a powerful person erosive injury when be being used at high pressure to differ is more serious, unfavorable use at tall viscosity, contain suspension grain or contain fibrous medium. In addition because accept the restriction that machines a condition, core of below two a powerful person on two-seater a powerful person closes not easily at the same time severe, the leakage rate when be being shut so is old, when be being used below the circumstance in high temperature or low temperature especially, because the hot coefficient of expansion of material is different, cause serious leak more easily. Body of a powerful person of a powerful person of horny pattern high pressure is orthogonal type, shed simple, obstruction small, those who suffer high speed fluid is erosive small also, special apply to high-pressured difference, tall viscosity and the fluid that contain material of shape of suspension content grain, also can use at handling steam fluid to mix, show the occasion of vapour corrode easily. Body of this kind of a powerful person can avoid to written guarantee anxious, felt is mixed jam, facilitating cleanness and self-purification.
1.2 have gas to leave according to control valve of film of pneumatic of security type selecting a powerful person closes valve compatibly two kinds of forms. Produce the safety on craft and use requirement consideration according to differring, when signal pressure is interrupted control valve is in open or closed position, endanger sexual size to what craft production causes and decide. If valve is in the harm when closed position small, choose gas to drive a powerful person, when signal pressure is interrupted, make control valve is in closed position, conversely, choose gas-tight a powerful person.
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