Spiral wound gaskets (SWG) are semi-metallic, consisting of a spirally wound v-shaped strip of stainless steel and a non-metallic filler such as graphite or PTFE. Also on the gasket is a solid outer ring that is used to center and control compression.
Mechanical seal - Mechanical seals are devices used to provide a seal at the entry or exit point of a rotating shaft. Typically used to prevent a high pressure fluid from leaking into a lower pressure fluid.
Non-metallic gaskets – this type of gasket relates to a gasket material that compresses easily under bolt load. This Non-Metallic Gasket (known as soft gasket) material can be selected from a wide variety of elastomers, compressed non-asbestos, PTFE, flexible graphite and high temperature sheet products.