Cleaning steps of copper valve:
1. According to manufacturing requirements, some parts need to be polished, and the surface cannot be manufactured;
2. All parts are de-oiled;
3. After deoiling is carried out, pickling and phosphating, the cleaning solution does not contain phosphorus;
4. Clean up with pure water after phosphating treatment and purification, and there should be no drug residues, and this step is omitted for alloy steel components;
5. Scrub the parts one by one with a non-proof cloth, and do not allow the surface layer of the remaining components such as cable TV wool to be air dried;
6. Clean the parts one by one with a non-anti-cloth or high-density sterilization filter dipped in analytical pure alcohol until there is no dirty color.
