Patent ID: 10145499

Abstract:
A metallic flange connection gasket to be used for sealing between flanges on pipes or between attractable pipe flange and flange of an operational unit, e.g. pump or valve, the gasket exhibiting at least a pair of circling first ridges, the ridges thereof protruding from opposite faces of the gasket, right opposite to each other, and at least one first valley being adjacent a respective one of the first ridges and recessed in a respective face of the gasket. The gasket has mutually unitary portions consisting of a radially outer portion having a first thickness, a first, radially inner portion radially inwards of the outer portion, and a second, radially inner portion radially inwards of the first inner portion, the inner portions both exhibiting a second thickness being larger than the first thickness. At a transition between the radially outer portion and the first, radially inner portion, as well as at a radially inner end of the radially inner portion close to a radially inner circumference of the gasket there is provided with a second pair of oppositely located ridges and a third pair of oppositely located ridges, respectively. The at least first pair of ridges constitutes a primary seal of the gasket, and the second and third pair of ridges constitute a secondary seal of the gasket.