Pure PTFE Envelopes
Pure PTFE envelopes are used as an external protective jacket for conventional gasket
materials like rubber. They are of three basic types:
"Slit" Type or Type V in which the gasket is slit to a V shape
"Square " type or Type M where the gasket is machined so that the inner base is flat.
"Folded" type or Type U where the inner base is rounded like a U.
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Pure PTFE Specifications
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Operating Temperature
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260oC max
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Melting Point
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327oC
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Density
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2.14 to 2.19 g/cm3
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Tear Strength at 23oC
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29 to 39 N/mm2
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Tear Strength at 150oC
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14 to 20 N/mm2
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Shore D - Hardness
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55 to 72
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