Category: O-rings and seals. Introduction: O-rings are essential components in various industries such as automotive, aerospace, medical, and manufacturing. They are used to seal gaps between two surfaces, preventing leaks or contamination. In this review, we will discuss the different types of o-rings and their applications. We will also provide recommendations for purchasing o-rings based on their quality, durability, and compatibility with various systems. Types of O-Rings: There are several types of o-rings, including Buna-N, EPDM, silicone, fluorosilicone, and perfluoroelastomers (PFE). Each type has its unique properties that make it suitable for specific applications. Buna-N O-Rings: Buna-N o-rings are made of nitrile rubber and are commonly used in automotive, aerospace, and industrial applications. They have excellent resistance to oil, grease, chemicals, and heat, making them ideal for sealing high-pressure systems. Buna-N o-rings are also resistant to UV radiation, which makes them suitable for outdoor use. EPDM O-Rings: EPDM o-rings are made of ethylene propylene diene monomer (EPM) and are commonly used in automotive, aerospace, and medical applications. They have excellent resistance to UV radiation, chemicals, and heat, making them ideal for sealing systems that require exposure to harsh environments. EPDM o-rings also have good chemical stability, which makes them suitable for use with various fluids. Silicone O-Rings: Silicone o-rings are made of silicone rubber and are commonly used in automotive, aerospace, and medical applications. They have excellent resistance to UV radiation, chemicals, and heat, making them ideal for sealing systems that require exposure to harsh environments. Silicone o-rings also have good chemical stability, which makes them suitable for use with various fluids. Fluorosilicone O-Rings: Fluorosilicone o-rings are made of fluorinated silicone rubber and are commonly used in aerospace, medical, and industrial applications. They have excellent resistance to UV radiation, chemicals, and heat, making them ideal for sealing systems that require exposure to harsh environments. Fluorosilicone o-rings also have good chemical stability, which makes them suitable for use with various fluids. PFE O-Rings: Perfluoroelastomers (PFE) o-rings are made of a unique type of rubber that is resistant to chemicals and heat. They are commonly used in the petrochemical industry, where they are exposed to harsh environments such as high temperatures and corrosive fluids. PFE o-rings have excellent resistance to UV radiation, chemicals, and heat, making them ideal for sealing systems that require exposure to harsh environments. Recommendations: When purchasing o-rings, it is essential to consider their quality, durability, and compatibility with various systems. Look for o-rings made of high-quality materials such as Buna-N or EPDM, which have excellent resistance to UV radiation, chemicals, and heat. Also, ensure that the o-ring's ID (inner diameter) and OD (outer diameter) match the system they will be used in. When purchasing a pack of o-rings, consider buying a variety of sizes to accommodate different systems. For example, if you need o-rings for a water filter, look for a pack that includes o-rings with various IDs and ODs to fit the filter's connections. Additionally, ensure that the o-ring kit comes with all necessary components such as gaskets or seals. Conclusion: O-rings are essential components in various industries, and choosing the right type of o-ring is crucial for ensuring a system's functionality and longevity. Buna-N, EPDM, silicone, fluorosilicone, and PFE o-rings each have unique properties that make them suitable for specific applications.