The style LS spiral wound gasket has been engineered by Flexitallic to provide an alternative to sheet gaskets in Class 150 and Class 300 service. Style LS gaskets have the inherent strength, resiliency and blowout resistance of spiral wound gaskets, yet require low bolt load for seating. They are manufactured with high purity Flexicarb flexible graphite filler or PTFE filler for optimum sealability, and are available for the full range of standard Class 150 and Class 300 flanges, as well as other non-standard low pressure flanges. The LSI features an additional inner ring for secure sealing and increased blow-out protection with high temperature and chemical resistance, therefore reducing maintenance costs.
The Flexitallic Low Emission gasket is a high performance spiral wound gasket that has been specially engineered to exceed stringent oil and gas industry fugitive emissions requirements, such as those found in the Chevron Fugitive Emissions Test (CFET). Independent testing in accordance with the CEFT protocol has show that Flexitallic Low Emission gaskets comfortable exceed allowable fugitive emission leakage levels. Leakage testing of ASME Class CGI spiral wound gaskets in accordance with the PVRC ROTT procedure shows that Flexitallic Low Emission gaskets require significantly lower bolt stress to achieve a T3 tightness class.
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