Selection of gaskets for plate heat exchangers?

EPDM: Ethylene propylene diene monomer rubber – used in water, steam, oxidizing media, alkaline solutions, and detergents. NBR: Nitrile rubber – used in mineral oils, fatty oils, and other oils

Forgot to mention: EPDM can withstand temperatures up to 160 degrees, while NBR can withstand temperatures up to 120 degrees. Different types of rubber don’t have clear advantages or disadvantages that can be compared

The answers on the second and third floors were truly insightful; please leave your name to learn from them. . .

What was said on the third floor makes some sense. However, there are still differences among different types of rubber. EPDM (Ethylene Propylene Diene Monomer rubber) is suitable for use in environments exposed to water, steam, acids, and alkalis; its temperature resistance is generally up to 150°C. NBR (Nitrile rubber) is a standard oil-resistant rubber, designed primarily for use in oil-filled environments; however, it is not suitable for all types of oils – those that are acidic or corrosive are not compatible with it. The temperature resistance is only up to 120–130°C. Sometimes, the medium inside the heat exchanger is not as simple as oil or water; alternatively, the temperature resistance required may be higher, reaching 160°C or even 200°C or more. Such complex conditions put the performance of rubber materials to the test. To deal with complex environments, some people use polytetrafluoroethylene, but polytetrafluoroethylene lacks elasticity, and I feel that this may affect its sealing performance. In the face of complex environments, there are now some new materials that can be used. AEM ethylene acrylate rubber is resistant to steam and complex greases, and it has high temperature resistance, including at low temperatures. The maximum temperature resistance rating does not exceed 180°C. FKM fluororubber: At present, domestic fluororubbers do not meet the requirements for resistance to steam, and it is difficult to satisfy the usage requirements in complex environments. Although their temperature resistance is quite high, reaching up to 230°C. Currently, there are a wide variety of FKM types available from foreign companies; DuPont’s fluororubbers, depending on the grade, can be used under a broader range of conditions. In addition to meeting higher temperature requirements, it also has a broader range of applicability in complex environments. Of course, different conditions must be taken into account; the more stringent the conditions, the higher-end the materials required, and the higher the cost will be, but safety levels will increase accordingly.