Metal bellows seals require another solution. Wear of the rotating components. This is especially true if the seal rotates in the fluid. Better seals are designed to cause rotation of the fluid in the seal chamber. If you prefer to solve the application problem by using a special seal.
Metal bellows seals.
An excellent choice for cryogenic and high temperature, non petroleum liquids. Some duplex material faces are showing good results in these applications. Carbon impregnated silicone carbide is an example of such a material. Elastomers that have a wide range of operating temperature. Low expansion metals such as Carpenter 42 and Invar 36 that will still retain the carbon or hard face in the holder even though the temperature changes greatly.