Valve parts must be processed before the following process:

    1, according to the processing requirements, some parts need to do polishing treatment, the surface can not have machining burr, etc.;

    2, all parts for processing;

    3, after completion of degreasing pickling and passivation, cleaning agent without phosphorus;

    4, after purification with purified water rinse clean, can not have a residue, carbon steel parts to save this step;

    5, parts one by one by non-woven fabric to dry, can not be wired the hair retained on the surface of the parts, or with clean nitrogen dry;

    6, non-woven fabrics or filter paper dipped analytical precision parts one by one alcohol wipe, until there is no dirty color