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Gaskets > Manufacturer > Flexitallic > Sigma
Flexitallic Sigma Gaskets
Sigma 500
Biaxially orientated PTFE containing hollow glass microspheres. Enhanced compressibility for low bolt loads. Improved flexibility over conventional calendered and graphite sheets. Moderate concentrations of acids & caustics, chlorine and hydrogen peroxide. Can be used for all concentrations of sulfuric acid. WRAS approved for hot and cold potable water services.
Manufaturer: Flexitallic
Sigma 511
Biaxially-orientated PTFE containing silica. Standard compressibility. Strong acids (except hydrofluoric) to general chemicals. Can be used for all concentrations of sulfuric acid. Not suitable for molten alkali metals, fluorine gas or hydrogen fluoride. WRAS approved for hot and cold potable water services.
Manufaturer: Flexitallic
Sigma 533
Biaxially orientated PTFE containing barium sulfate. Standard compressibility. Ideal for sealing food, pharmaceutical and other non-contamination applications. Strong alkaline solutions to other general chemicals. Aqueous hydrofluoric acid below 49%. Not suitable for sealing molten alkali metals or fluorine gas.
Manufaturer: Flexitallic
Sigma 588
Biaxially orientated PTFE. Highly conformable surface layers designed for glass-lined, FRP, ceramic, plastic and low bolt load applications. Modified PTFE inner core design to maximize sealability and prevent blow-out. FDA compliant.
Manufaturer: Flexitallic
Sigma 600
Developed specifically for petrochemical and chemical use. FDA compliant for both low and high bolt loads. Is non contaminating with lower creep an cold flow. A single gasket replacement for metallic and non-metallic flange applications. Max Temperature: 500 Degrees F (260 Degrees C). Max Pressure: 1235 psig (8.5 MPa). ASME m: 1.4. ASME y: 1595 psi (11 MPa). pH Range: 0-14.
Manufaturer: Flexitallic