Because PTFE rubber is one the chemically inert rubber compounds, PTFE Seals / Diaphragms can be used with a wide variety of fluids and gases.
Teflon is also known for PTFE. It can be used with extremely aggressive fluids like acids, caustics and ketones. PTFE's mechanical and chemical properties provide excellent flexlife and good abrasion resistance.
PTFE also meets the requirements of FDA 21 CFR 177, USP Class VI standards, for food, drink, and pharmaceutical applications. To provide flexibility and resilience/elasticity for the desired operations, a backup diaphragm made of another material or Teflon-bonded rubber diaphragm should be used.
Q: What are the performance characteristics of oil seals made of PTFE rubbers?
A: The advantage of oil seals (seals) made of PTFE rubber is that they have a high degree of chemical stability and good chemical inertness. Strong acids or strong oxidants and organic solvents do not work on it. Due to its good thermal stability, its pyrolysis temperature is above 400°C. It can work normally in the temperature range of -200℃-~300℃. In the ultra-low temperature working environment, the PTFE rubber oil seal can work very well.
In addition, it has good abrasion resistance. The friction coefficient between the PTFE oil seal materials is 0.1~0.2. The dry friction coefficient with the metal is between 0.1 and 0.3, and in the case of liquid lubrication, it is between 0.02 and 0.04. Its dynamic and static friction coefficients are relatively small, and its static friction coefficient and friction coefficient are almost the same. The surface of the PTFE sealing material has outstanding surface self-lubrication, and almost all sticky substances cannot adhere to its surface.
Q: What are the disadvantages of oil seals made of PTFE rubbers?
A: The disadvantage of the oil seal (seal) made of PTFE rubber is that the production cost of the oil seal is high and the production process is complicated. Lack of high elasticity, large amount of wear, and relatively low life.
Q: In what industries can PTFE rubber seals be used (in what mechanical equipment or environmental occasions)?
A: PTFE rubber oil seal (polytetrafluoroethylene elastomer) is widely used in the field of weapon industry, aviation industry, hydraulic and pneumatic systems, oil pipes in the petroleum industry, reciprocating and rotary shaft seals, and is combined with rubber elastomers to make combinations Seals.