When choosing a seal ring material that is resistant to Freon (common Freon types such as R134a, R1234yf, R22, etc.), EPDM is widely considered to be the best choice due to its excellent chemical stability and media resistance. Here is a detailed explanation:
Features of EPDM
Chemical stability:
Freon resistance: EPDM has good tolerance to Freon and can maintain its physical and chemical properties in a Freon environment.
Chemical resistance: EPDM has good tolerance to many chemical media such as water, alcohols, ketones, esters, etc.
High and low temperature resistance:
High temperature performance: EPDM can maintain good performance at high temperatures of 150°C and is suitable for high temperature environments of air conditioning and refrigeration systems.
Low temperature performance: At low temperatures of -50°C, EPDM can still maintain its elasticity and sealing properties.
Ozone and UV resistance:
Ozone resistance: EPDM has good ozone resistance and is suitable for use outdoors or in high ozone environments.
UV resistance: EPDM has a certain tolerance to UV radiation, but since UV rays can cause material aging, UV stabilizers are usually added.
Mechanical properties:
Elasticity: EPDM has good elasticity and can maintain good sealing performance under dynamic stress.
Compression deformation resistance: It has good compression deformation resistance and is suitable for high pressure and high temperature environments.
Application scenarios
Air conditioning and refrigeration systems:
Air conditioning compressors: EPDM seals are used for sealing air conditioning compressors and can withstand Freon and other lubricants.
Refrigerant pipelines: Used for sealing refrigerant pipelines to ensure the sealing and reliability of the system.
Automotive industry:
Automotive air conditioning systems: Seals used in automotive air conditioning systems that can maintain performance under high temperature and high pressure environments.
Refrigeration systems: Seals used in automotive refrigeration systems that withstand Freon and other chemical media.
Industrial refrigeration equipment:
Industrial refrigeration compressors: Seals used in industrial refrigeration compressors to ensure long-term stable operation of the system.
Refrigerant pipelines: Seals used in industrial refrigerant pipelines to prevent leakage and improve system efficiency.
Why is EPDM the most suitable?
Excellent Freon resistance:
EPDM has excellent tolerance to Freon and will not fail due to chemical erosion by Freon.
Under high temperature and high pressure environment, EPDM can maintain its chemical stability and will not expand or shrink.
Good chemical resistance:
EPDM is not only resistant to Freon, but also resistant to a variety of chemical media, suitable for complex use environments.
It can withstand lubricating oil and other additives in the refrigeration system to ensure long-term use.
Wide range of applications:
EPDM is widely used in various refrigeration and air-conditioning systems and can meet the needs of different application scenarios.
It has good processing performance and is suitable for the manufacture of seals of various shapes and sizes.
Conclusion
Ethylene propylene rubber (EPDM) is considered to be the best choice among Freon-resistant sealing ring materials due to its excellent Freon resistance, chemical resistance, high and low temperature resistance and wide range of applications. When selecting sealing ring materials, it is recommended to consult professional seal manufacturers or suppliers to ensure that the selected materials can meet the actual application requirements.
Post time: Nov-28-2024