Four main technical points of degreasing and cleaning of 304 material sanitary fast-install butterfly valve

304 material sanitary quick-install butterfly valve degreasing cleaning method introduction The sanitary valve parts must go through the following process before assembly: 1. All parts of the sanitary butterfly valve need to be polished, and the surface must not have processing burrs, etc.; 2. Sanitary All parts of the butterfly valve body are degreased; 3. After the degreasing of the sanitary butterfly valve is completed, pickling passivation is carried out, and the cleaning agent does not contain phosphorus; the sanitary butterfly valve is rinsed with pure water after pickling and passivation, and there should be no chemical residue, carbon steel This step is omitted for the parts; dry the parts one by one with a non-woven fabric, and do not leave the surface of the part such as wire wool or dry it with clean nitrogen; 4. The sanitary fast-install butterfly valve is stained with non-woven fabric or precision filter paper. Pure alcohol wipes the parts one by one until there is no dirty color.