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Service Capabilities
The limits of pressure, temperature and speed are dependant upon the materials specified for the rotary seals and seats, as well as the nature of the media to be sealed. The maximum capabilities of each seal type are shown on the individual data sheets. Changes in single spring seal operating capabilities are partially a factor of each seal design but are mainly influenced by selection of elastomer type and seal face materials. Elastomer selection primarily sets temperature and chemical resistance;
Differing face material combinations affect seal capability, performance and life. Their pV (pressure x velocity) value largely determines the suitability of material combinations of seal faces and specifically the amount of heat generated at the faces. The ability of the face material to resist wear increases the life of the seal particularly in abrasive applications. Vulcan offer face combinations, from carbon, solid ceramic and stainless steel materials, as standard. We recommend fine-grained, reaction-bonded silicon carbide as the superior "hard face" material, to be used for both faces for maximum wear resistance, or to run against carbon for ultimate pV capability. Standard Materials;
Kalrez and Viton are registered trademarks of Dupont Dow Elastomers.
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