The DeltaV-Seal provides a metal-to-metal seal, unlike any other seal. With a combination sealing rings and a small surface area the DeltaV-Seal deforms to the flange. Traditional metallic seals require perfect flange faces, whereas the DeltaV-Seal can be installed on any flange meeting the requirements of ASME PCC1 Annex D. The DeltaV-Seal is a near-perfect seal with effectively zero-fugitive emissions due to its patentend bespoke precission machined structure. Pipeotech's patented DeltaV-Seal simply and easilly replaces traditional gaskets on raised and flat face flanges combining the benefits of metal-to-metal seals with the ease of use of traditional gaskets.