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Virgin grade PTFE gaskets are made from 100% pure material which is used in most general applications. PTFE gaskets are made of synthetic fluoropolymer of tetrafluoroethylene consisting completely of carbon and fluorine. PTFE has excellent dielectric properties and provides excellent thermal insulation with an operating temperature range of -200°C to 260°C. PTFE is the most chemically resistant plastic known and is unaffected by most corrosive liquids, vapors, and gases PTFE gasket products provide outstanding chemical resistance for duties where hygiene and non-contamination are essential.
EPTFE (Expanded or Soft PTFE) is a Universal sheet EPTFE Gasket material for most services. Gaskets cut from this Seal rough and irregular surfaces. Made from biaxial oriented expanded PTFE sheeting that is laminated to the required thickness. Seals of up to 3000+psi can be achieved depending on the flange type design and type of media being sealed. Chemically resistant over the 0-14 pH range. Specific gravity: 4 to 6. Suitable for temperatures to 600F. Our EPTFE gasket material is manufactured by expanding 100% virgin PTFE using a proprietary process that produces a uniform and highly fibrillated microstructure with equal tensile strength in all directions. The resulting product exhibits characteristics significantly different than conventional PTFE sheet. EPTFE is much softer and more flexible than regular PTFE sheet gasketing and thus conforms easily to irregular and rough surfaces. In addition, the gasket material is easier to compress and minimizes creep and cold flow.
Our EPTFE is an all purpose gasket material that can replace all other types of PTFE sheet. It will seal all aggressive chemicals over the entire 0-14 pH range except for molten alkali metals and elemental fluorine. Made from 100% virgin PTFE, Our EPTFE gasket material not only resists chemical attack, but it will not contaminate or discolor end products. These industries currently use expanded PTFE gasket material.:
A PTFE envelope gasket is a composed gasket. The product consists of an envelope of PTFE with an inlay. The envelope gasket is mainly applied as a flange gasket in applications where a high chemical and high pressure resistance is required.
Envelope gaskets have the chemical resistance of PTFE, but the strength and resilience of the inlay material. PTFE envelope gaskets combine the benefits of different materials:
In a chemical aggressive environment, where pollution of the medium is not allowed, it is complicated to apply a standard gasket. Here PTFE envelope gaskets are applied as flange gaskets. For example, in the (petro) chemical industry and in the process industry.
The envelope gaskets are also ideal for application in the food industry. PTFE is physiologically inert and may be used in direct contact with food (FDA).
