Cleaning steps of valve

Cleaning step

The parts and components of the valve must be processed before assembly:

1. According to the processing requirements, some parts need to be polished, the surface can not have machining burr and so on.

2, all parts and components are defatted;

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

4, after pickling and purification, rinse with pure water, there can be no drug residue, carbon steel parts to save this step;

5, one by one with non-woven cloth to dry, can not have thread wool and other parts left on the surface, or with clean nitrogen to dry;

6. Use non-woven cloth or precision filter paper to analyze pure alcohol to wipe one part at a time until there is no dirty color.

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