Pneumatic valve fluorine-butterfly pneumatic valve anti-corrosion chemical industry how to respond?

corrosion has been the main problem of chemical equipment, improper use often damage the equipment, and even cause serious accident. According to statistics, about sixty percent of the chemical equipment damage is caused by a corrupt, so in choosing chemical pneumatic valves ( Pneumatic valve fluorine-butterfly first when you need to pay attention to the applicability of the pneumatic valve materials.
and strong sulfuric acid as a corrupt one of medium, sulfuric acid is a major industry raw material use is very widespread. Differences of sulphuric acid concentration and temperature of data corruption and differences, for concentration in % above, temperature less than ℃ concentrated sulfuric acid, carbon steel and cast iron has good corrosion resistance, but it does not fit the activities of sulfuric acid, not practical for pump pneumatic valve data; The material of popular stainless steel such as chemical pneumatic valve selection ( CrNi、( CrNiMoTi also has limited usefulness for sulphuric acid medium. Based on pneumatic conveying of sulfuric acid pump valve all adopt high silicon cast iron ( Forging and machining difficulty is big, high alloy stainless steel, Alloy production. Function of fluorine plastic has good resistance to sulfate, adopt pneumatic valve fluorine-butterfly is a more economical choice.
organic acid, acetic acid, it is the one of the strongest material decay resistance, popular steel city in all of acetic acid concentration and temperature, Hui, serious corruption, excellent resistance to acetic acid is stainless steel materials, stainless steel containing molybdenum pneumatic valve can also be practical in high docile dilute acetic acid steam. For high temperature and high concentration of acetic acid or contain other corruption medium such as mean request, can choose high alloy stainless steel pneumatic valves or fluorine plastic air valve.
should greatly, hydrochloric acid are metal materials are not resistant to decay (hydrochloric acid Contains all kinds of stainless steel materials, including high silicon molybdenum also can only be used for ℃, % the following hydrochloric acid. And metal materials contrary, most of the non-metallic materials of hydrochloric acid has excellent resistance to decay, so lined with rubber pneumatic valves and plastic air valve ( Such as polypropylene ( CH, fluorine plastic is the best choice of transportation hydrochloride.
and general metal nitrate most damaged by the agile corrupt in nitric acid, stainless steel pneumatic valve is the most widely used nitric acid resistant material, all on room temperature the concentration of nitric acid has excellent corrosion resistance, it is worth mentioning the molybdenum stainless steel ( Such as, L to nitric acid's corrosion resistance not only superior to stainless steel ( Such as, and sometimes even better. For the high-temperature nitric acid, who take the titanium and titanium alloy materials.