Washing step of valve
All parts of valve must be processed through the following process before assembling and installing:
1.According to the processing requirements, some parts do need polishing, the surface can not have burr processing;
2.All parts degreasing treatment;
3.After the completion of degreasing pickling passivation, non-phosphorus detergent;
4.After washing with acid and purified water pure and clean, can not have drug residues, carbon steel components omitted this step;
5.Parts one by one with a dry non-woven fabric, etc. can not be wired hair retained the part surface, or carried out with clean dry nitrogen;
6.Non-woven or paper dipped analytical precision parts alcohol to wipe one by one, until there is no dirty color.