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PTFE Cut Gaskets

Information

PTFE Gaskets are cut from virgin PTFE sheets, or molded rods, tubes, etc.PTFE has the best chemical resistance among known plastics. It also has good aging stability, electrical insulation, wear resistance, and an extremely low friction coefficient. The unloaded operating temperature range is -180~+260°C.

PTFE gasket is one of the most suitable types of gaskets for a variety of sealing applications. Different types of PTFE gaskets are available to meet various application demands.

Sr. No. Compounds Virgin PTFE Glass Filled PTFE (25%) Carbon Filled PTFE (25%) Bronze Filled PTFE (40%) Graphite Filled PTFE (15%)
Properties Unit
1 Density g/cc 2.1-2.2 2.22-2.25 2.0-2.2 3.0-3.2 2.10-2.16
2 Tensile Strength kg/cm2 210-375 125-200 125-200 125-225 150-200
3 Elongation At Break % 250-400 200-300 80-150 200-350 150-250
4 Compressive Strength kg/cm2 40-50 75-85 75-85 85-100 65-75
5 Impact Strength J/cm 1.4-1.5 1.0-1.1 0.7-0.8 0.9-1.0 0.8-0.9
6 Hardness Shore D 58-62 58-63 60-65 62-66 60-65
7 Coefficient of Friction
a. Dynamic P- 7kg/cm2 V-0.5 0.04-0.06 0.5-0.54 0.12-0.17 0.11-0.15 0.11-0.16
b. Static P-35 kg/cm2 0.05-0.08 0.11-0.13 0.06-0.11 0.08-0.10 0.08-0.10
8 Water absorption (max.) % 0 0.013 0 0 0
9 Continuous Service Temperature °C +260 +260 +260 +260 +260
10 Di-electric Strength Kv/mm 22-24 11-12 1-2 Conductive 1-2
11 Chemical Resistance PTFE is chemically inert & unaffected by all known chemicals except molten or dissolved alkali metals- Sodium, Potassium, Rubidium, Cesium, Francium & Fluorine Gas, certain fluorine compounds and complexes at elevated temperatures. Filled PTFE has inferior chemical resistance depending upon the particular filler.

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