Metallic Double Jacketed Gaskets, are comprised of a metallic outer shell and washer or with two reversed wrap-round shells with either a metallic or non metallic asbestos free filler. The filler material gives the gasket resilience, while the metal jackets protect the filler and resists pressures, temperatures and corrosion. Metallic Double Jacketed Gaskets are manufactured using hand made techniques, and  are traditionally used on boiler and heat exchanger applications when ample bolting is available to correctly seat the gasket. They are designed for high pressure and temperature applications up to and inclusive of class 900. The temperature limitation is dictated by the combination of metallic and non-metallic materials used in its construction.  The resilience and recovery properties of these gaskets are limited. Metallic Double Jacketed Gaskets require exacting conditions of flange surface finish, high bolt loads and flange flatness in order to seal. Flange widths as narrow as 8mm (5/16") can be manufactured, dependent on diameter. Very large gasket diameters can also be produced. Normal gasket thickness is 3.2mm (1/8"). These gaskets can be provided with graphite faces.  

A wide range of materials are available, to suit specific temperature and corrosive conditions.

Flexitallic 127 Double Jacketed Gaskets