Sealing systems operating at elevated temperatures are subjected to continuous mechanical and thermal stresses. While a gasket may provide an effective seal when first installed, its ability to maintain sealing performance can reduce over time as the material responds to prolonged loading and heat.
Industrial equipment often remains in service long after the original manufacturers have discontinued support. As drawings are lost, part numbers become obsolete, and suppliers disappear, sourcing replacement gaskets can become a major challenge for maintenance teams, engineers and restoration specialists.
In industries where sealing performance is critical, quality cannot be left to chance. Whether a gasket is being used in automotive systems, industrial equipment, fluid handling assemblies, or heavy machinery, manufacturers and OEMs need confidence that every component will perform consistently under real-world conditions. That is where PPAP approval plays a vital role.
Dobson Gaskets has been recognised on a global stage, earning the prestigious Supplier Excellence Recognition Award from Caterpillar Worldwide, a distinction that places the company among the very best in an extensive international supply network.
PTFE is often specified as a default sealing material for chemically aggressive environments. However, in practical engineering terms, PTFE is not a single material. Virgin PTFE, filled PTFE, and expanded PTFE (ePTFE) exhibit fundamentally different mechanical behaviours, particularly under load, over time.