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Flexitallic SIGMA® 533

SIGMA® 533 is a high performance biaxially orientated sheetsealing materialcontaining PTFE with barium sulphate (barytes) filler.

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SIGMA® 533 is suitable for sealing most chemicals across the whole pH range (0-14) with the exception of molten alkali metals,
fluorine gas and anhydrous HF. Sigma® 533 is particularly suitable for use in applications involving strong alkalis.

Material Properties

Color

White

Thickness

1.5 mm

Typical Physical Properties

Density

2.9 g/cm³

ASTM F36A Compressibilty

8 %

ASTM F36A Recovery

43 %

BS 7531 Gas Permeability

< 0.1 mL/min

Maximum Temperature

260 °C

Maximum Pressure

Vacuum to 85 bars

ASTM F152 Tensile Strength

15 MPa

DIN 52913 Residual Stress @ 175°C

28 MPa

ASTM F37A Liquid Leakage 1000 psi gasket stress, 50 psi Fuel A

3 mL/hr

ASTM F38B Creep Relaxation

33 %

Approvals and test reports

TA Luft
FDA

Flexitallic SIGMA® 533

SIGMA® 533 is a high performance biaxially orientated sheetsealing materialcontaining PTFE with barium sulphate (barytes) filler.

Producttype

Certificates

Pressure

Temperature

Service

Material Properties

Typical Physical Properties

Approvals and test reports

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