Do you know FKM and PTFE rubber?
Do you know FKM and PTFE rubber?
FKM oil seals and PTFE oil seals are two common sealing materials. They each have different performance characteristics and application scopes, and are widely used in the automotive industry. The following is a detailed description of their differences and their applications in car series.
Full name of the material: Fluorocarbon rubber (Fluoroelastomer), common brands such as Viton (DuPont).
Features:
High temperature resistance: can withstand about 200°C (short-term up to 250°C)
Strong chemical resistance: especially fuel, lubricating oil, ATF oil, etc.
Good elasticity, easy assembly
Aging resistance, ozone resistance, UV resistance
Full name of the material: polytetrafluoroethylene (Polytetrafluoroethylene), commonly known as "Teflon"
Features:
Super strong chemical resistance, can withstand most chemicals
Wider temperature range: -200°C ~ +260°C
Extremely low friction coefficient, good wear resistance
No elasticity, requires metal skeleton or spring auxiliary sealing
Higher requirements during installation, can not be over squeezed or stretched
| Feature | FKM Oil Seal | PTFE OIL Seal |
| Temperature range | -20°C ~ +200°C | -200°C ~ +260°C |
| Oil resistance | Very good | Excellent |
| Elasticity | HIGH | LOW |
| Friction coefficient | Medium | Very low |
| Initial sealing | Good | Auxiliary structure required |
| Installation requirements | Simple | Complex |
| Cost | Low | HIGH |
Comparison of applications in car series
Application scenarios of FKM oil seals
Suitable for power system seals of most ordinary cars and mid-to-high-end models, such as:
-Front and rear oil seals of engine crankshaft
-Camshaft oil seal
-Gearbox input/output shaft
-Turbocharger oil seal
-CVT and ATF sealing system
-Representative car series/model applications:
Mainstream car companies such as Toyota, Honda, and Volkswagen use FKM oil seals in large quantities
Engine seals of mid-to-high-end cars such as Audi A4 and BMW 3 Series
PTFE oil seal application scenarios
Suitable for seals with high temperature, high speed, long life and extreme working conditions, such as:
-High-performance engine
-Dual clutch transmission (DCT) oil seal
-Supercharger sealing system
-Electric vehicle motor shaft seal
-High-performance applications such as racing cars and heavy trucks
-Representative car series/model applications:
-Porsche, Mercedes-Benz AMG, high-end BMW M series, Tesla
Commercial vehicle/heavy truck (such as Mercedes-Benz Actros, Volvo FH series) motor shaft seal, etc.