SEAL TYPES
Cure Date – Curing is the heat-induced process whereby the long chains of the rubber molecules become cross-linked by a vulcanizing agent to form three-dimensional elastic structures. The Cure Date is the date that the rubber is fully molded in this process. Shelf(Storage) Life – the maximum period of time, from cure date, to the date an elastomeric product is...
PTFE (Polytetrafluoroethylene) has become a commonly used material in sealing applications where other materials do not meet temperature, chemical compatibility, friction, or wear requirements. Many customers are unaware that “fillers” may be added to PTFE in order to enhance certain characteristics not found in virgin PTFE. Virgin PTFE possesses “creep” behavior that reduces effectiveness in mechanical applications. Significant deformation of...
Recommended shaft and bore tolerances It is almost impossible, in practice, to manufacture seal components with absolute dimensional accuracy; actual production parts may vary slightly from dimensional drawings. Given this fact, it becomes necessary that the nominal dimensions of critical contact points fall within certain acceptable ranges to allow for reliable operation. These tolerances for nominal diameters are published by...
