What Materials Are Mechanical Seals Generally Made Of?

Mechanical seals are generally made of a variety of materials, mainly including end face materials, auxiliary sealing materials, spring materials, bellows materials, etc. ‌

End face materials: Commonly used end face materials include furan resin impregnated graphite, antimony impregnated graphite, silicon carbide, nickel-based hard alloy, cobalt-based hard alloy, etc. These materials are acid and alkali resistant, high temperature resistant, and wear resistant, and are suitable for different working conditions and media.

Auxiliary sealing materials: Auxiliary sealing materials include polytetrafluoroethylene, flexible graphite, aluminum, copper, etc. These materials have good sealing performance and corrosion resistance, and are used to enhance the reliability and durability of mechanical seals.

Spring materials: Spring materials need to have good elasticity and corrosion resistance. Commonly used materials include 1Cr18Ni9Ti, 0Cr17Ni12Mo2 (316), 00Cr17Ni14Mo2 (316L), Hastalloy C, Inconel 718 (GH4169), etc. These materials can maintain elasticity and necessary clamping force under long-term working conditions.

‌Bellows materials‌: Bellows materials include 1Cr18Ni9Ti, 0Cr17Ni12Mo2(316), 00Cr17Ni14Mo2(316L), Hastalloy C, Inconel 718(GH4169), etc. These materials show good stability and durability in high temperature and corrosive media.

The design of mechanical seals and the selection of materials used depend on the specific working conditions, including the nature of the medium, temperature range, pressure, etc. Appropriate material selection can ensure the effectiveness and long-term stability of mechanical seals.