O-ring, as a ring mechanical gasket, elastomer as the main material, in the industrial field can be called a seal “weapon”, its application range is extremely wide, small to daily faucets, large to advanced aircraft engines, have its figure. It can effectively prevent the leakage of fluid or gas in the equipment and system, and plays a key role in ensuring the normal operation of various mechanical devices.
When selecting O-rings, many factors need to be taken into consideration. Temperature, chemical resistance and size can not be ignored, and the most critical point is the material type of O-ring. The difference of materials will have a very significant impact on the performance of O-rings, and different application scenarios have completely different requirements for O-ring materials. Next, we will give you a detailed explanation of various common O-ring materials to help you make the most appropriate choice.
Common O-ring material
Nitrile material
Features:
Chemical resistance: Excellent chemical resistance, can adapt to a variety of complex environments.
Heat resistance: Good heat resistance, suitable for temperature range from -65°F to 250°F.
Wear resistance: strong wear resistance.
Applications:
Widely used in industrial and medical fields.
Not suitable for automotive brake fluid ketone, phosphate hydraulic fluid, halogenated hydrocarbon and nitrohydrocarbon environment.
Silicone material
Features:
High temperature resistance: The applicable temperature range is -84°F to 232°F, and can withstand high temperature shocks of up to 115°F in a short time.
Adaptability: Good adaptability to steam, water or petroleum fluids.
Applications:
High temperature fuel nozzle.
It is used in static environments and is not suitable for dynamic scenarios.
Ethylene propylene diene rubber (EPDM)
Features:
Chemical resistance: Excellent chemical and heat resistance.
Temperature range: The applicable temperature range is -65°F to 300°F.
Applications:
Equipment exposed to sunlight and ozone weathering.
Hot water flow systems, aviation and automotive brake fluid related devices.
Polytetrafluoroethylene (PTFE)
Features:
High density: A specific gravity of 2.2, twice the density of water.
Chemical resistance and low friction properties: Excellent chemical resistance and low friction properties.
Applications:
Food processing, automobile manufacturing and other fields.
Static applications such as automotive steering and paint guns.
Fluororubber (Viton)
Features:
Versatile: Able to deal with silicon fluids, gases, oils, acids and some halocarbons.
Wide range of applications: chemical processing, automotive and instrument applications.
Applications:
Not suitable for alcohols, amines, esters, low molecular weight ethers or hot hydrofluoric acid environments.
Hydrogenated nitrile butadiene rubber (HNBR)
Features:
Wear resistance and high temperature resistance: High wear resistance and high temperature resistance.
Temperature range: The applicable temperature range is -30°C to +150°C.
Applications:
Automotive, industrial, and other applications with high performance requirements.
Not suitable for strong acid or alkali environments.
Polyurethane material
Features:
Strong toughness: strong overall toughness, excellent extrusion resistance and wear resistance.
Temperature range: The applicable temperature range is 60°F to 200°F.
Applications:
Hydraulic parts, valves, cylinders, firearms and pneumatic tools.
Not recommended for acidic, ketone and water-based product environments.
Rubber material
Features:
Good elasticity: plays an important role in various sealing applications.
Temperature range: The applicable temperature range is -55°F to 300°F.
Applications:
Plumbing and automotive applications.
It is vulnerable to chemicals and other substances and has a relatively limited service life.
Polyacrylate (ACM)
Features:
High temperature resistance: able to withstand higher temperatures.
Corrosion resistance: It has certain corrosion resistance.
Applications:
Stainless steel O-rings are relatively more flexible, have better sealing performance, and are not easy to be corroded.
In food related applications.
AFLAS
Features:
High temperature resistance, compression set and chemical compatibility: suitable for a variety of applications where these properties are required.
Temperature range: The applicable temperature range is -30°F to 400°F.
Applications:
Oil, water, air and other fluid environments.
It is not recommended for applications in highly corrosive environments or high mechanical stress.
Neoprene rubber
Features:
Good chemical resistance: good tolerance to a variety of chemicals.
Temperature range: The applicable temperature range is -40°C to 120°C.
Applications:
A kind of O-ring widely used in the market.
It is not applicable to the application scenario with high friction.
conclusion
To sum up, O-rings play a pivotal role in many mechanical applications, and their core role is to seal the connection to prevent leakage. There are many different types of O-rings made of different materials on the market, and it is important to closely combine the specific application scenarios when selecting O-ring materials. Detailed consideration of the operating conditions, such as temperature, pressure and other factors, as well as the compatibility with the contact fluid, only in this way can ensure the selection of the most suitable O-ring material, so as to ensure the stable operation and efficient work of the mechanical device.
jinshiling has been focusing on high-performance ptfe O-rings and customized ptfe components for many years, always uphold the spirit of professionalism and innovation, to provide our customers with excellent products and quality services.
Our product range ranges from standard size ptfe O-rings in stock to custom cut seal assemblies tailored to customer specific needs, with a wide range of material options to meet the demanding requirements of different application scenarios. Whether it is a conventional industrial application or a high-end field with special requirements for material properties, Kingling can match the most appropriate solution for you with its exquisite technology and deep technology accumulation.
If you are eager to learn more about our product details, seek more technical information, or expect to receive a free and accurate project quote, please contact our professional team today. The experts of Jinshiling will serve you wholeheartedly, answer your questions from a professional perspective, and work together to create a new experience of efficient and reliable sealing application.
