Abrasive corrosive-resisting butterfly valve, its production and forming mould

Abstract

The invention is about the amelioration to the wearing and corrosion resistant butterfly valve, the character is that at least the valve plate surface coat is a elastic mass which is a resistance to acid, alkali-proof and pouring polyurethane. At least the valve plate which is the easiest to be abraded is coated by the polyurethane, it can greatly improve wearing and resistant ability of the valve plate, also can greatly improve the acid- resisting, alkali-proof and chloride ion-resisting ability, so it can prolong the operating life of the butterfly valve. There are warp lining betweens the lining in overflowing part of the valve body and the body of valve for anchoring, it can greatly enhance the firm ability of the lining and the valve body, and will not make the lining slough, it is especially the same with the heavy caliber such as the 500-1000mm latus rectum butterfly valve.

Description

technical field

[0001] The invention relates to the improvement of the wear-resistant and corrosion-resistant butterfly valve, in particular to a wear-resistant and corrosion-resistant butterfly valve with a longer service life in the flue dust wet desulfurization system. Background technique

[0002] The most abrasive part of a butterfly valve is the valve plate. Existing wear-resistant and corrosion-resistant butterfly valves, such as butterfly valves used in soot wet desulfurization systems, usually use stainless steel valve plates, and rubber and plastic coated valve plates. The flue dust wet desulfurization circulating fluid not only has a particle solid content of 5-15%, but also has alkaline substances such as calcium hydroxide, magnesium hydroxide, sodium hydroxide, or ammonium hydroxide in the desulfurization circulating fluid due to different neutralization media. , and the circulating fluid becomes acidic after the neutralization medium is absorbed and saturated,...

Images