Sealing closure for containers

A sealing closure for containers in which a liquid is stored under pressure and removed therefrom under pressure by means of a tapping arrangement having a breaching spike, comprising in combination, a plug-like closing body having an axial bore and a conically tapered outer side, a flange which is adapted to bear against the container top, said body having an anjular groove disposed between said flange and said conically tapered outer side, a sealing means on said body including at least two ring seals projecting in said bore and axially spaced from each other, an ejectable sealing cap removably mounted in the lower opening of said bore to close said lower opening, as well as a removable closure cap removably mounted in the upper opening of the bore to sealingly close said upper opening, the upper ring seal having a relatively large radius of curvature and being arranged at the upper inner margin of said bore and the lower ring seal being arranged at the lower inner margin of said bore, said removable closure cap being adapted to be penetrated and said sealing cap being adapted to be ejected by said tapping spike when said tapping arrangement is operatively mounted on the sealing closure.