Spiral Wound Gaskets

Instruction
Spiral wound Metallic gaskets are manufactured by winding alternate layers of Metal strip and filler material over each other in circular (Spiral) Way. The layers are wound on each other tightly on automatic machine to prevent leakage and to act as seal between flanges through which liquid or mediums is passing at high temperature and pressure. CAF or other types ofGaskets can withstand temperature. Pressure only upto certain level and therefore in case of high pressure, temperature applications in order to provide effective sealing, spirally wound metallic gaskets are used. Normally, the shapes of Flexitallic Spiral wound Gaskets iis circular, however, in certain cases, in can also be made in non circular shape.

In addition to Metal strips and filter material inner and outer centering rings made out of solid metal are provided to add extra strength to the gaskets, depending upon flanges.

Filler Material & Metal Used
As mentioned above, the Spiral  Gaskets are made out of alternate layers of metal strip and filler material. The Metal Strip and the centering Ring may generally be of S.S. 304 or S.S. 316 and Low Carbon Steel. The filler materials may consist of Asbestos (mainly, Compressed Asbestos Fibre Sheets) Grafoil (Pure graphite strips) and in some cases, PTEF (Teflon), depending upon gasket application and temperature, pressure conditions.

Metal And Metal Jacketed Gaskets
Metal Gaskets are made from pure metal sheets ion specified dimensions (i.e. Inner diameter and outer Stainless Steel , Copper, Aluminium etc.

Metal Jacketed gasket, as the anme suggests, alre made by mailing a jacket (covering) of metal and filling the jacket with filler material. The metals used are mainly Copper, aluminium, Lead, Soft Steel of Stainless Steel. The filler material mainly their use in Boilers, Heat Exchangers, Autoclaves, etc. There are three types of Metal Jacketed Gaskets.

• Single Jacketed Gaskets
• Double Jacketed Gaskets
• Over lapping Jackets Gaskets.