Spiral-wound gasket

A spiral-wound gasket for use between facing flanges of two flow conduit sections, each flow conduit section defining a through bore, said spiral-wound gasket comprising:

• an outer ring;
• a metal inner ring having an annular inner face which is flush with said through bores, said inner ring having grooves and ridges along upper and lower surfaces of said inner ring and a coating directly on said grooves and said ridges;
• and
• a low-compression, spiral-wound portion positioned between said outer ring and said inner ring, said spiral-wound portion having an alternating sequence of metal windings and polymeric sealant strips, wherein each metal winding having a first axial width dimension and each sealant strip having a second axial width dimension, said second axial width dimension is larger than said first axial width dimension, wherein said second axial width dimension is between about 0.175 inches and about 0.185 inches and said first axial width dimension is between about 0.145 inches and about 0.165 inches.