Lens Gasket

In certain applications, the specification of a high integrity metallic seal has usually lead to the selection of the Lens Ring concept, rather than the more generally recognized ring type joint solution. The Lens Ring is covered solely by the DIN 2696 specification. However, ASME B16.5 and other flange types can be modified to accept the Lens Ring.

The Lens Ring provides a metallic gasket design incorporating spherical seating faces designed to suit specifically mating flange recesses, providing the user with a high integrity, high pressure/temperature metal to metal seal.

As with all metallic gaskets, the Lens Ring material should be specified softer than the flange material, thus ensuring applied compressive load leads to the elastic/plastic deformation of the lens ring and not the flange sealingface. The distribution of high compressive loads leads to the spread of the gasket facings, ensuring over stressing of the gasket is prevented. In accordance with DIN 2696 general materials are limited to a range of specified carbon steels and stainless steel grades, although alternative grades are available upon request. We require a detailed drawing be supplied when ordering non-standard Lens Rings.

MOC
Lens Material – Soft Iron, SS 304, SS304L, SS 316, SS 316L, SS304H, SS316H, SS321, SS410,Duplex 31803, Duplex 32205, Duplex 32750, Duplex 32760, Inconel 600,Inconel 625, Inconel 800, Inconel 825 &Monel 400