Valve Cleaning Steps

Parts of the valve must go through the following processes before assembly:

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

2. All parts are degreased;

3. After the degreasing is completed, pickling and passivation is carried out, and the cleaning agent does not contain phosphorus;

4. Rinse with pure water after pickling and purification, and there should be no chemical residue, and this step is omitted for carbon steel parts;

5. Wipe the parts with non-woven fabrics one by one, and do not leave the surface of the parts such as wire hair, or dry them with clean nitrogen;

6. Wipe the parts one by one with non-woven fabric or precision filter paper dipped in analytical pure alcohol until there is no dirty color.