Silicone elastomers, for use in seals and gaskets, are not compatible with which refrigerants?

Silicone elastomers are widely used in seals and gaskets due to their excellent thermal stability, flexibility, and resistance to chemicals. However, when it comes to compatibility with refrigerants, they can react adversely with certain types.

In the case of HFOs (hydrofluoroolefins), which are a new generation of refrigerants designed to have low global warming potential, silicone elastomers may not perform well. The chemical structure of HFOs can lead to degradation or swelling of silicone materials, resulting in compromised sealing properties and potential failure of the gasket or seal. This incompatibility is primarily due to the specific molecular characteristics of HFOs that can interact unfavorably with silicone compounds.

In contrast, HCFCs (hydrochlorofluorocarbons) and CFCs (chlorofluorocarbons) typically exhibit better compatibility with silicone elastomers, as they do not chemically degrade the material in the same way. Additionally, HFCs (hydrofluorocarbons) are also generally compatible with silicone elastomers, although there can be exceptions based on specific formulations.

Understanding these compatibilities is crucial for selecting the right materials for sealing applications in refrigeration systems, where the integrity of seals and