Specific Requirements For Valve Cleaning
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The parts of Gate Valve must go through the following process before assembly:
1. According to the processing requirements, some parts need to be polished, and there should be no processing burrs on the surface;
2. All parts are degreased;
3. After degreasing, pickling and passivation are carried out, and the cleaning agent does not contain phosphorus;
4. After pickling and purification, rinse with pure water, and there should be no residual chemicals. Carbon steel parts can skip this step;
5. Wipe each part with non-woven cloth, and there should be no lint on the surface of the parts, or blow dry with clean nitrogen;
6. Use non-woven cloth or precision filter paper dipped in pure alcohol to wipe each part until there is no dirt.
