Skim the pneumatic valve requirements and test procedures (3)

, cleaning steps:
pneumatic valve components before assembly must be through the following procedure:
) According to process requirements, some parts need to be polished, the surface can't have burr processing, etc. ;
) All parts degreasing process;
) In the pickling passivation skimmed ( No phosphorus detergent) Complete;
the acid passivation with pure water is rinsed clean) There can be, Carbon steel parts to omit this step) Pharmaceutical residues;
) Part one dry nonwoven cloth, wool and other reserves cannot cable surface components, or with a clean dry nitrogen;
) Nonwovens or analytical pure filter paper with alcohol to wipe precision parts one after another, until there is no dirty color.
assembly called
parts must be clean for the installation of the seal. At the request of the installation process is as follows:
) Factory must ensure a clean install, or create a temporary clean area ( A cloth or plastic etc, for example, a new color to buy) In order to prevent dust into the installation process.
) The assembly workers must wear clean cotton overalls, wearing cotton hats, hair can't leak, wear clean shoes, wear ( Skim) Plastic gloves.
) Assembly tools must be cleaned before assembly in addition to the oil, ensure clean.
and other requirements
) At least minutes remove nitrogen pneumatic valve assembly is complete.
) Tightness test, it must be with high purity nitrogen.
) Qualified after the envelope air-tightness test, seal with a clean polyethylene, polyethylene in organic solvent hat before use, wipe clean wet to the skin.
) And then the vacuum seal.
) The final packaging.
6) Transport shall take measures to ensure continuity of the encapsulation process.
,
to accept subsequent hydrogenation - inspection requirements 'Skim and construction acceptance,' before each filter assembly precision components for the wipe clean ( Choose death part) , a filter paper qualified the same color. ) Qualified after the envelope air-tightness test, seal with a clean polyethylene, polyethylene in organic solvent hat before use, wipe clean wet to the skin.
) And then the vacuum seal.
) The final packaging.
6) Transport shall take measures to ensure continuity of the encapsulation process.
,
to accept subsequent hydrogenation - inspection requirements 'Skim and construction acceptance,' before each filter assembly precision components for the wipe clean ( Choose death part) , a filter paper qualified the same color.
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