The Highest Quality O-Rings Available When You Need Them
DESIOR TECHNOLOGY CO.,LTD has served as the leading rubber component manufacturer in China.
EPDM O-RING
O-Ring Groove Design Extrusion Limits
Contact Us For Assistance Or SamplesClick Here and contact us today to receive a free quote or if you have any questions regarding sizing.
An o-ring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it.
An o-ring can perform sealing by means of squeeze under low pressure conditions. The extent of extrusion depends upon the hardness of O-ring, the pressure, and the size of the clearance gap.
O-Ring Size & Dimension Charts
There are two main o-ring sizing types: standard and metric. Standard was developed for use in the United States, while the international community uses -metric sizes. The metric sizes are further broken down by region, notably Europe and Japan.
Learn more about O-Ring sizes using the links below to explore their dimensions in an interactive chart.
• Standard AS-568B
• Japanese Metric O-Rings (JIS)
• European Metric O-Rings (DIN)
Seal & Design has all these sizes and more. We can provide virtually any required size.
We Supply This Standard Oring
| ● AS 568A USA | ● BS 4518 England | ● DIN 3771 Germany | ● SMS 1586 Sweden |
| ● AFNOR 47501 France | ● JIS B2401 Japan | ● JASO F404 Japan | ● ISO 3601 International |
Service Guarantee
• Perfect logistics system and SAP system to provide customers with accurate service guarantee;
• Guaranteed shortest delivery time based on stock.
Hydrogenated Nitrile Butadiene Rubber - Hnbr
HNBR is made via selective hydrogenation of the NBR butadiene groups which improves the temperature and ozone resistance considerably. HNBR is widely known for its physical strength and retention of properties after long-term exposure to heat, oil, and chemicals. HNBR has better heat resistance; oxidation resistance; tensile strength and abrasion resistance than standard nitrile (NBR). Also an excellent choice for automotive refrigerant service.
Both o-rings and gaskets can be made from Nitrile materials.
Names: Hydrogenated Nitrile, HNBR, HSN
Chemical Resistance
Aliphatic hydrocarbons (propane, butane, petroleum oil, mineral oil and grease, diesel fuel, fuel oils) vegetable and mineral oils and greases
Silicone Oils
Automatic Transmission Fluid
Automotive refrigerants
HFA, HFB, and HFC fluids
Dilute acids, alkali and salt solutions at low temperatures
Not Compatible
Fuels of high aromatic content
Aromatic hydrocarbons (benzene)
Chlorinated hydrocarbons (trichloroethylene)
Polar solvents (ketones, esters, ethers, acetones)
Strong acids
Glycol based brake fluids
Ozone, weather, and atmospheric aging
Disclaimer: These are general guidelines only. All materials should be tested in your application.
Ethylene Propylene (epdm)
EPDM is a copolymer of ethylene and propylene. Ethylenepropylene-diene rubber (EPDM) is produced using a third monomer and is particularly useful when sealing phosphate-ester hydraulic fluids and in brake systems that use fluids having a glycol base.
Both o-rings and gaskets can be made from EPDM materials.
Names: Ethylenepropylene-diene rubber, EPDM, EPR, EPM.
Chemical Resistance
Hot water & steam up with special compounds up to 400°F (204℃)
Glycol based brake fluids up to 300°F (149℃) Many organic and inorganic acids
Cleaning agents, soda and potassium alkalis
Phosphate-ester based hydraulic fluids (HFD-R)
Silicone oil and grease
Many polar solvents (alcohols, ketones, esters)
Ozone, aging and weather resistant
Not Compatible
Mineral oil products (oils, greases, and fuels).
Disclaimer: These are general guidelines only. All materials should be tested in your application.
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