Filling valve for counterpressure filling of cans

摘要: Counterpressure valves for filling cans with liquids under pressure such as carbonated beverages are disclosed. In a preferred embodiment, the present invention provides filing valve in which seal between and can is created by an O-ring disposed about member. Preferably, two concentric, axially-spaced O-rings used; first o-ring serves guide, while second, slightly larger creates seal. Since sealing may be moved axially along to permit head space volume expand, need snift or similar relief eliminated. Sealing utilizing radially expandable gaskets also these embodiments, gasket expand counterpressure form inner surface of can.