Expanded PTFE
Made of 100% pure PTFE which is expanded using a special process that produces a uniform and highly fibrillated micro- structure. This results in a gasket material with all the excellent chemical resistant properties of PTFE but with very good sealing charaterisistics. Expanded PTFE is soft and pliable yet surprisingly tough. It is resistant to pressing, creep relaxation and cold flow. It seals uneven surfaces very well and may even be used in damaged flanges. Highly inert and a very "clean" material.
It is recomemnded for use with potable water and for the food industry. For higher dynamic loadings expanded PTFE with stainless steel insertion is available.
Available in sheets, and as joint sealant.in ribbon tape or rolls
Sheet dimemsion: 1500mm x1500mm 0.8mm to 6mm thick
Tape and Joint Sealant: 1.5mm to 6mm thick, width 3mm to 40 mm
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Expanded PTFE Specifications
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Operating Temperature
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260oC max
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| Sealability (ASTM F37) |
0.16ml/hr
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| Compressibility (ASTM F-36) |
66%
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Recovery (ASTM F-36)
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29 to 39 N/mm2
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Creep relaxation (ASTM F-38)
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38%
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