PTFE seals are always used when good sliding properties, wide temperature ranges and high chemical resistance are required. The low friction makes Teflon the ideal material for various industries when dynamic seals are required (e.g. as a hydraulic seal and pneumatic seal). What exactly are hydraulic seals?
PTFE is also used for mechanically demanding dynamic seals: as a rod seal, scraper or piston seal. Mechanical strength is improved in such cases by fillers, e.g. PTFE compounds such as PTFE bronze, PTFE carbon and PTFE moss².
Corrosive chemicals are processed as standard in the chemical and pharmaceutical industries. Seals made of PTFE are omnipresent here, because ordinary rubber seals and seals made of silicone would be attacked and show inadequate service life. PTFE seals are also often used in fittings and valves, such as turbine construction and hydroelectric power plants.
Teflon seals are used in food production because it is naturally stable to acidic media (e.g. beverage production) and it is approved for use in food production. In addition, the thermal conductivity can be greatly improved.
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