Wenzhou Longwan Junkai Valve Factory is located in Longwan, the valve capital of China. It is a professional manufacturer of stainless steel valves. The main products are: stainless steel ball valve, stainless steel Y-strainer, stainless steel flange, stainless steel mirror, stainless steel gate valve, stainless steel globe valve, stainless steel check valve, etc.
Now Junkai Valve will introduce the inspection process of stainless steel ball valve. The inspection before and after the stainless steel ball valve needs to be carried out strictly according to the requirements.
Inspection steps of stainless steel ball valve:
①According to the processing requirements, some parts need to be polished, and no processing burrs should be left on the surface.
②All parts need to be degreased.
③The stainless steel ball valve should be pickled and passivated after degreasing (the cleaning machine does not contain phosphorus).
④After pickling and passivation, it needs to be rinsed with pure water, and there should be no chemical residue (this step is omitted for carbon steel parts).
⑤The parts should be wiped dry with non-woven fabrics, and no lint remains on the surface. It can also be dried with clean nitrogen.
⑥ Wipe each part one by one with non-woven fabric or precision filter paper dipped in pure alcohol until it is clean.
⑦After the assembly is completed, the stainless steel ball valve needs to be purged with nitrogen for at least 1 minute.
⑧The air tightness test must be carried out with pure nitrogen.
⑨Encapsulate after passing the air tightness test. It needs to be sealed with a clean polyethylene cap. Before using the polyethylene cap, it should be soaked in organic solvent and wiped clean.
⑩ Finally, seal it with a vacuum bag.