Selection of elastomers is normally the final result of a compromise between fluid resistance and last, but not least, the cost of the product.
Chemical resistances of different elastomers are listed in Table 2.
Tear resistance of elastomer (ASTM D624-D) is very important for those applications where rubber parts are subject to strain and stresses, particularly when surface cuts could cause tears and severely damage the effectiveness of the seal.
Wear resistance (ASTM D394) is very important for the correct evaluation of any O-Ring in a dynamic sealing application.
Critical factors to be considered are:
- Polymer type
- Surface finish
- Relative speed