Coated o-ring (O-ring) is a combination of rubber elasticity and sealing with Teflon chemical resistance. It is made of silicone rubber or fluorine rubber inside and Teflon FEP or Teflon PFA covered with relatively thin. This rubber combined with Teflon o-ring will have excellent sealing properties.

General rubber o-ring (O-RING) is easy to wear, chemical corrosion resistance and poor gas penetration resistance (except perfluorinated elastomer), pure Teflon O-ring hardness is higher and can resist compression but poor elasticity. Coated with Teflon FEP/Teflon PFA ORING, it has good solvent swelling resistance and chemical stability (unless it is attacked by metal, fluorine and some halides at high temperature), and good elasticity in the o-ring near the rubber. The Teflon FEP/ Teflon PFA has a very small coefficient of friction (only 0.1 to 0.2) and excellent gas permeability resistance, which makes the coated o-ring truly suitable for use in harsh environments.

The combination of the Teflon FEP/Teflon PFA cladding with the rubber inner core, which is compact and seamless, makes the whole o-ring of the coated type maintain consistent sealing. The elastic and compressive strain of all points on the o-ring is uniform, and it can be repeatedly installed and used under continuous pressure. As the pressure of the medium increases, the o-ring is compressed as a whole. The coated O-RING is like a liquid with high viscosity, transmitting the pressure acting on it to all directions without reducing.

The existence of Teflon FEP coating makes the coated o-ring have good anti-hardening and anti-brittleness. Meanwhile, the inner core made of silicone rubber or fluorine rubber makes the sealing ring still maintain good elasticity at the high temperature of 200℃.

The test results of Diwei FFKM rubber, FKM rubber and coated o-ring with FEP/PFA are shown in the compression Diweice. The coated o-ring, which combines the physical properties of silicone rubber or fluorine rubber with the chemical properties of Teflon FEP/ Teflon PFA, has good compressibility resistance while maintaining the properties of rubber.

The manufacture of the coated o-ring is subject to strict quality control through the use of a special technique that makes the Teflon FEP polymer completely encrusted with a rubber inner core and ensures that the o-ring has the required standard tolerances. The data used demonstrates our strong quality commitment to coated o-ring products, which is based on performance testing and strict quality control to ensure customer satisfaction and safe use of this product. Coated o-ring and any other rubber or pure Teflon o-ring in one respect, has unparalleled sealing and long life, especially in harsh media.
Coating material
Teflon FEP and Teflon PFA are similar in nature, but Teflon PFA has better high-temperature resistance than Teflon FEP.

Applicable temperature range
Teflon FEP shell: -60℃ ~ 200℃ can be used at 240℃ high temperature for a short time
advantage
Excellent chemical resistance, suitable for almost all chemical media. Excellent corrosion resistance
• Wide temperature range • Good compressibility
• Good resistance to solvent growth • Resistance to friction
• Excellent sealing durability, long service life • High pressure resistance
use
• PUMP VALVE • Reaction vessel
• Mechanical seal • Filter
• Pressure vessel • heat exchanger
• Boiler • Pipe flange
• Gas compressor
Application industry
• Chemical industry • Aircraft manufacturing
• The pharmaceutical industry Transportation of oil and chemicals
• Oil refining • Rubber industry
• Refrigeration engineering • Food processing industry
• Paper industry • Dye manufacturing
• Paint spraying • Semiconductor
• Optoelectronics • People's livelihood