1) The assembled stainless steel ball valve is purged with nitrogen for at least 1 minute;
2) The air tightness test is performed with pure nitrogen;
3) Encapsulate after passing the air tightness test, seal with a clean polyethylene cap, soak the polyethylene cap with an organic solvent before use, and wipe it clean;
4) Then seal it with a vacuum bag;
5) After packing;
6) Measures should be taken to ensure that the package is not damaged during transportation.
