Tandem seal gasket assembly

A gasket assembly comprising:

• a metal ring having opposed first and second faces, the faces having a profiled configuration defined by alternating ridges and depressions;
• a plastic envelope received over and covering the first and second faces of the metal ring, the plastic envelope having substantially smooth, planar first and second faces facing outwardly from the metal ring;
• and,
• a spiral wound seal disposed radially outward of the metal ring and including layers of strip metal and fire resistant packing material, the spiral wound seal having a tongue and groove profile.

A gasket assembly comprising:

• a metal ring having opposed first and second faces interconnected along an inner periphery, the faces having a profiled configuration defined by concentric ridges radially spaced apart by depressions;
• a plastic envelope received over at least a portion of the metal ring faces for sealing against highly corrosive process media or where high purity is required;
• a fire resistant seal disposed radially adjacent the plastic envelope for maintaining seal integrity in response to elevated temperatures;
• and
• a guide ring disposed radially outward of the spiral wound seal for centering and limiting compression of the gasket assembly, the guide ring having a groove for receiving an outer peripheral portion of the tongue and groove profile of the spiral wound seal.