Viton / ptfe / gft metal parts: However, it is strongly influenced by the modulus of elasticity. Mechanical seals come in a wide range of designs however the most important factor when determining how long a seal is going to last, is deciding on the right seal face materials.
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The primary seal is the seal created by the hydrodynamic film between the two (very flat) seal faces. Carbon is considered the most effective sealing face material when paired with a significantly harder material. Carbon (car), silicon carbide (sic), ceramic and tungsten carbide (tc).
To ensure optimal operation, you need to know the difference between the four primary materials:
With the mechanical seal we are dealing with two seals, primary and secondary. Compliance is generally thought of as a function of the seal shape; The carbon material must be self lubricating and have a low coefficient of friction and yet be. Materials with a low modulus, such as carbon, are more easily made into.
It is commercially attractive and available in multiple quality levels.
