Description
O ring is circular sealing elements with circular cross-sections, may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring. O-ring(Viton O ring, PTFE O ring...) selection is based on chemical compatibility, application temperature, sealing pressure, lubrication requirements, durometer, size and cost. We offer you a range of elastomeric materials for both standard and special applications which allow the O-Ring to seal practically all liquid and gaseous media.

Design Theory
Orings are one of the most common yet important elements of machine design. They are available in various metric and standard sizes.  Sizes are specified by the inside diameter and the cross section diameter (thickness). The most common standard sizes in the US are controlled by SAE AS568.  ISO 3601-1:2012 contains the most commonly used standard sizes, both inch and metric, worldwide. The UK has standards sizes known as BS sizes, typically ranging from BS001 to BS932. In China, the standard for O ring is GB3452(new standard) and GB1235(old standard).The Japan also has standards sizes known as JIS standard(G series,P series). Several other size specifications also exist.O-rings can be produced by extrusion, injection molding, pressure molding or transfer molding.
Applications
O-Rings are used in a variety of fields: they are either used as sealing elements or as energizing elements for hydraulic slipper seals and wipers. Thus, the O-Ring is basically used in every field of industry including aerospace, automotive or general engineering. Today, O-rings are one of the most common seals used in machine design because they are inexpensive, easy to make, and reliable and have simple mounting.
Features
All O Rings are made according to international standard: ISO 3601, AS 568, DIN 3771, JIS B2401, GB3452, BS1516.
Excellent abrasion and wear resistance
Excellent extrusion resistance, accepting even the most significant extrusion gaps
Very good mechanical properties
Technical data
Temperature: -40°C / +200°C   Depending On Rubber Material
Speed: up to 15 m/s
Medias: The majority of liquid, gaseous or chemical product fluids depending on the type of material selected. Refer to our fluids-materials compatibility guide.
Advantages
Compact design
Easy assembly
Economic solution
Symmetry that reduces the risks of an assembly error
Materials
Morgan O-rings Material Includes Nitrile rubber, fluorine rubber, ethylene propylene rubber, neoprene, chloroprene rubber, silicone rubber and so on.
NBR (Nitrile Butadiene Rubber)
Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR o ring  has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.FKM O ring(fluorinated rubber)

Depending on their structure and fluorine content, fluoroelastomers can vary in terms of chemical resistance and resistance to cold. This FKM-based rubber is very often used for high-temperature hydraulic and pneumatic systems, industrial valves, injection/fuel systems, motor seals and high-vacuum systems.EPDM (Ethylene Propylene Diene Monomer rubber)
As an Ethylene Propylene Diene Monomer copolymer, EPDM o ring is commonly used for hot water taps, cooling systems, brake systems, dishwashers and washing machines.HNBR (Hydrogenated Nitrile Butadiene Rubber)

This HNBR-based elastomer is obtained through selective hydrogenation of the NBR's butadiene groups. The HNBR O ring is commonly used for power-assisted steering and for air conditioning.VMQ (silicone rubber: methyl vinyl polysiloxane)
This FVMQ-based rubber is very often used for fuel systems.FVMQ (fluorosilicone rubber)
The FVMQ has mechanical and physical properties that are very similar to those of VMQ. However, the FVMQ offers better resistance to fuels and mineral oils. However, resistance to hot air is not as good as that of VMQ.ACM (Polyacrylate)
Polymers containing ethyl acrylate (or butyl acrylate) have a small amount of monomer, which is necessary for cross-linking; ACM is a material with better heat resistance than NBR. It is often used for automatic gearboxes.AEM (ethylene acrylate rubber)
As a methyl acrylate and ethylene copolymer, AEM is considered to be better resistant to heat than ACM. Its characteristics make it an intermediary between ACM and FKM.CR (Polychloroprene)
This CR-based elastomer is used in the refrigeration industry and for ventilation systems. This chloroprene was the first synthetic rubber to be developed and marketed.FFKM (perfluorinated rubber)
FFKM has the best resistance to high temperatures and an excellent chemical inertia. This FKM-based rubber o ring is very often used for high-temperature hydraulic and pneumatic systems, industrial valves, injection/fuel systems, motor seals and high-vacuum systems.The table below gives an overview of the physical, chemical and mechanical characteristics for each of the materials.1. excellent properties    2. Good properties    3. Average properties    4. Poor properties
Chemical compatibility
A "Chemical compatibility guide" catalogue can be downloaded from the Literature section. You can also use our online "Chemical compatibility" tool free of charge.
These two tools enable you to measure the behaviour of our materials that come into contact with the majority of existing fluids. The data displayed is the result of rigorous testing at the ambient temperature and takes previous publications into consideration. Test results are not fully representative because of the specific features of your application. The tests performed actually do not consider additives and impurities that may exist under actual conditions of use, nor the potential elevation of temperatures. Other parameters can also alter the behaviour of our materials, such as the hardness, persistence, abrasion, etc. We therefore recommend performing your own tests to verify the compatibility of our materials depending on your specific application. Our technical team can provide you with any additional information.

o ring sizes:

The o ring sizes are specified by the inside diameter and the cross section diameter.Morgan Rubber O-rings are manufactured according to metric and imperial international standards such as BS1516, GB3452.1-92, AS 568B, DIN ISO 3601 and JIS standard. Morgan seals also accept custom sizes of almost any dimension, such as metric o rings, miniature O-rings, special O-rings with large dimensions and continuously moulded and spliced. The follows is the o ring size chart for the American AS568 standard O ring. For more O ring list, please contact with us.



About Morgan
Established by Guangzhou Mechanical Engineering Research Institute Co., Ltd. (51% share, hereinafter to be referred as GMERI) and Morgan Construction Co., Worcester, MA, U. S. A. (49%, hereinafter to be referred as Morgan, Worcester) in 2006, Guangzhou Morgan seals Company Ltd. Is a professional rotary shaft oil seal manufacturer. Combined the rich seals research and production experience of GMERI with the advanced technology and administration of Morgan, Worcester, the joint venture is renowned for its modern production lines, persisting research & development, strict quality control, quality sales and after-sales service. Now she has gained a good name from her customer all over the world, such as Siemens Primetals, Baosteel, SMS siemag and so on.

Morgan Seals Research and Development ability is based on her parent firm who has won awards as scientific research achievements for more than 1000 projects and over 200 of them won scientific and technological progress prizes of municipal, provincial, ministerial and national levels. At the same time, it also has one National Certified Laboratory, one National Engineering Research Centers and three Industry Level Inspection Centers.