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Valve cleaning procedure
上传时间:2019-06-11
Valve components must go through the following procedures before assembly:


1. According to the processing requirements, some parts need to be polished, and the surface should not have processing burrs, etc.;


2. Degreasing all parts and components;


3, after the degreasing is completed, the pickling passivation, cleaning agent does not contain phosphorus;


4, after pickling and purification, rinse with pure water, no pharmaceutical residue, carbon steel parts omitted this step;


5. Each part shall be wiped dry with non-woven cloth, and the surface of the parts shall not be retained with wired wool, or blown dry with clean nitrogen;


6. Use non-woven cloth or precision filter paper to dip analysis of pure alcohol to wipe each part until there is no dirty color.
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