Spiral wound gaskets have the ability to recover under the action of fluctuating loads caused by process fluid pressure and temperature changes, flange face temperature variations, flange rotation, boltstress relaxation and creep.
The gasket sealing element consists of a pre-formed metallic windingstrip with layers of a softer, more compressible
sealing material whichduring compression, is compressed and flows to fill imperfections in theflange surfaces when
the gasket is seated. The metal strip holds thefiller giving the gasket mechanical resistance and resilience.
Spiral wound gasket’s basic sealing element,several layers of specially formed continuous V-shaped metal strip are
spirally wound with alternate plies of soft filler strip. The "V" profile allows the gasketto act as a spring and the depth
is carefully controlled to bestow the sealingelement with the best compression and recovery characteristics. In order
tofurther enhance themechanical and sealing properties of the gasket, it isnormal practice to apply several layers of
the metal strip only to the innerand outer diameters.
Controlled winding through machines are carefully monitor and adjustthetension of the winding strips. A uniform
density throughout the productis produced. This providesthe spring-like action within the gasket whichenablesit
to maintain a seal even when subject to fluctuating compressiveloads.
Solid metallic inner & outerring
Suitable for high pressure and temperature applications
Standard spiral wound gasket for raised face applications
Prevents turbulence and erosion damage to flange
Prevents damage to the gasket bore and inner windings
Inner ring acts as a heat shield and as a corrosion barrier
Wide choice of materials for filler and metalstrip
General and critical duties
Solid metallic outerring used as a centering deviceand
compression stop.
Used mainly on raised face and flat face flanges
Wide choice of materials for filler and metalstrip
General duties
Solid metallic innerring
High pressure & high temperaturecapability
Male to female flanges in vessels, valves and pumps
Wide choice of materials for filler and metalstrip
General and critical duties
Wide choice of materials for filler and metallicstrip
Suitable for high pressure andtemperature applications
Recommended flanges are tongue&groove, male to female and flatface to recessin vessels, valves and pumps.
General and critical duties
