Contaminant-free AeroSphere canisters are thoroughly cleaned in hot deionized water and dried with ultrapure nitrogen. Canisters are leak-tested, evacuated and shipped under vacuum. 304SS chime, ring and 16 ga. Approximately 5-6 lbs. P4VE high integrity bellows valve with Vespel seat.
Valve outlet is sealed with a stainless steel tube fitting plug.