Spiral Wound Gaskets

General Description

A spiral wound gaskets is categorized as semi-metallic gasket that is typically used for high pressure applications. The sealing element is formed by winding two materials (one for sealing, one for resilience) into thin v-shaped spirals.

One material used in the sealing element is usually a metal and the other, referred to as a filler, which is a soft nonmetallic material, typically Teflon, aramid fibre or graphite. Both are chosen for compatibility with the sealing media and their ability to withstand the operating conditions. Different configurations exist to handle different flange designs and operating conditions.

These gaskets have good recovery and good tolerance for flange-surface finish irregularities. The sealing action is the result of a combination of the flow of the metal and soft filler plies when the gasket is compressed. They are particularily suited for assemblies subject to extremes in joint relaxation, temperature or pressure cycling, shock, or vibration.

Available in several standard shapes
SWR Spiral Wound Metaillic Gasket without centering ring
SCD Spiral Wound Metallic Gasket with centering device
SOR Spiral Wound Metallic Gasket with centering ring. (Centering ring made of carbon steel stainless steel and other metals)
SIO Spiral Wound Metallic Gasket with inner & outer rings. (Rings are made of carbon steel stainless steel and other metals)
SIOH Spiral Wound Metallic Gasket with outer ring supplied with bolt holes and inner rings
SIR Spiral Wound Metallic Gasket with inner rings. (Rings generally of stainless steel)
Material Selection Table
Metal winding strip Filler materials   Guide ring materials inner & outer
Stainless Steel 304 / 304L Asbestos Fiber Carbon Steel
Stainless Steel 316 / 316l Non Asbestos Fiber Stainless Steel 304 / 304L
Stainless Steel 316Ti Graphite Stainless Steel 316 / 316l
Stainless Steel 321 P.T.F.E Stainless Steel 316Ti
Stainless Steel 317 / 317L Ceramic Stainless Steel 321
Monel 400   Stainless Steel 317 / 317L
Inconel 600   Monel 400
Incoloy 800 / 825   Inconel 600
Titanium   Incoloy 800 / 825
Nickel 200   Titanium
    Nickel 200
Flange Standards
ASME/ANSIB16.5 MSS SP44 (ASME B16.47 SERIES A) (AWWA)
BS 1560, BS10, BS4504 DIN FLANGES, JIS FLANGES
API 605 (ASME B16.47 SERIES B) FRENCH NF STANDARD