In our earlier blogs in July, we showcased why
- FKM/Viton® lined hoses are superior to Fluorosilicone (FVMQ) liner hoses, and
- We also provided test-data to support the above claim after ageing long-term at 230 deg C and 270 deg C
The exhaust gases that get circulated back into the cylinders, dilute the oxygen coming through the air intake, thereby reduced peak in-cylinder temperatures as well as pumping losses, ultimately reducing Nitrogen Oxide (NOx) emissions.
EGR systems can also add abrasive contaminants and increase engine oil acidity, which in turn can reduce engine longevity.
Silicone Hoses lined with FKM/Viton®, and reinforced with meta-aramid, are widely used as flexible connectors in the charge-air-cooler systems, and some of the attributes that are needed in these kinds of systems, are good resistance to:
- Vinegar acid solution (with pH as low as 2.5)
- Sulphuric acid (with pH as low as 1.0)
- Ammonia solution (although FKM/Viton® is not so good with Ammonia solution, it survives the level of resistance required for these applications)
Some of the peroxide-grade FKM (Viton®) materials that we use perform well against these requirements.
At Shore Auto Rubber Exports Pvt. Ltd., We also supply High Quality Silicone Hoses with Fluorosilicone lining as well. Fluorosilicone (FVMQ) scores over FKM/Viton® when it comes to cold-temperature resistance, going down all the way to -55 deg C comfortable. You can count on us!