PTFE (Polytetrafluoroethylene) is a synthetic fluoropolymer of tetrafluoroethylene. It is a solid form of fluorocarbon and a compound with elevated molecular weight. It consists entirely of fluorine and carbon atoms. It is hydrophobic, which means that it cannot be made wet by substances containing water or by water itself. This is possible due to fluorine’s high electro-negativity and low levels of friction coefficients against all types of solids.
Common reasons to upgrade to PTFE sealing solution:
- Suitable for many industries, including: Heavy Equipment, Aerospace, Environmental (solar, wind, electric batteries), Automotive, Lab/Scientific, and Aerospace
- High temperature rating
- Higher pressure rating than standard rubbers
- Friction coefficient extremely low (Low coefficient of friction)
- Ability to handle aggressive media(Aggressive Chemical Resistance)
Benefits of a PTFE Solution:
- Very broad temperature range(Broad Temperature Range (generally -400°F-550°F)
- Low friction characteristics resulting in increased efficiency and lower power consumption
- Ability to run dry
- Less preventative maintenance
- Unlimited shelf life
- No explosive decompression
- No swelling due to moisture absorption
- Safe for use in vacuum applications
- Robust additives available to improve strength and reliability
Considerations:
- Is my hardware conducive for a PTFE solution?
- What's the ideal surface finish?
- Hardware (piston/bore) hardness min 55 rockwell C
- PV Value (Pressure Velocity)
Installation
- Installation varies depending on the application, but this is important when considering PTFE vs a different type of elastomer.
PTFE is a robust material that can be made into a variety of sealing shapes, profiles, and uses, such as: Spring energized seals, slipper seals, anti-extrusion rings, guiding tapes, chevron stacks, bearings, and bellows.
Please reach out to a Gallagher Engineer if you have an application that may benefit from a PTFE sealing solution. Contact us today to speak about your specific application.