Quick release purge valve and substrate container using same

A substrate container comprising an inner box assembly for accommodating a substrate and an outer box assembly for accommodating the inner box assembly, the outer box assembly comprising:

• a base comprising a bottom plate having a first opening, a cover plate, and a quick release purge valve configured to allow a gas entering or leaving the substrate container, the quick release purge valve comprising:
• a snap plate detachably engaged to the first opening and being at most evenly aligned with the bottom plate, wherein the snap plate comprises a main body and an elastic arm, the main body is used for fixing to one side of the gasket fitting, and one end of the elastic arm is connected to the main body and the other end of the elastic arm is used for engaging with the bottom plate;
• a gasket fitting disposed between the cover plate and the bottom plate and having an airflow conduit communicating the cover plate and the bottom plate;
• and
• a valve element disposed in the airflow conduit for limiting a flow direction of the gas;
• and
• an outer cover for engaging with the base to form a sealed state therebetween;
• wherein the gasket fitting is configured to be fixed in the base when the snap plate and the bottom plate are in an engaged state and to be removable from the base when the snap plate and the bottom plate are in a disengaged state.