Vespel® is a high performance polyimide material which will not melt and can operate continuously from cryogenic, with excursions to 900 degrees F (482 degrees C). Vespel® parts consistently exhibit superior performance in a variety of applications requiring low wear and long life in sever environments.
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Types of Vespel
Vespel® SP-1 is the unfilled base resin grade. Vespel® SP-1 provides maximum strength, elongation, and toughness as well as the best electrical and thermal insulation valves.
Vespel® SP-21 has 15% graphite by weight added to the base resin for increased wear resistance and reduced friction in applications such as bearings, thrust washers, bushings, seal rings, slide blocks, and other wear applications.
Vespel® SP-211 has 10% PTFE and 15% graphite by weight added to the base resin for the lowest coefficient of friction over a wide range of operating conditions. It also has excellent wear resistance up to 300 degrees F (149 degrees C).
Vespel® SP-22 has 40% graphite by weight for enhanced weight resistance, lower friction, improved dimensional stability (low coefficient of thermal expansion), and stability against oxidation.
Vespel® SP-3 is 15% moly-filled (molybdenum disulfide solid lubricant) for wear friction resistance in vacuum and other moisture free environments where graphite actually becomes abrasive.