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Flexitallic SIGMA® 511

SIGMA® 511 is a high performance biaxially orientated sheet sealing material containing PTFE with silica filler.

Service

SIGMA® 511 is suitable for sealing most chemicals across the whole pH range (0- 14) with the exception of molten alkali metals,
fluorine gas, hydrogen fluoride or materials which may generate these. SIGMA® 511 is particularly suitable for use in
applications involving strong acids.

Material Properties

Color

Pink

Thickness

1.5 mm

Typical Physical Properties

Density

2.2 g/cm³

ASTM F36A Compressibilty

7 %

ASTM F36A Recovery

44 %

BS 7531 Gas Permeability

< 0.1 mL/min

Maximum Temperature

260 °C

Maximum Pressure

Vacuum to 85 bars

ASTM F152 Tensile Strength

16 MPa

DIN 52913 Residual Stress @ 175°C

30 MPa

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

4 mL/hr

ASTM F38B Creep Relaxation

35 %

Approvals and test reports

TA Luft
BAM
WRAS
FDA
EC 1935/2004

Flexitallic SIGMA® 511

SIGMA® 511 is a high performance biaxially orientated sheet sealing material containing PTFE with silica filler.

Producttype

Certificates

Pressure

Temperature

Service

Material Properties

Typical Physical Properties

Approvals and test reports

More information about this product?

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