AVIATIONEU NEW ERA ISO 3601 / DIN 3771 O-Rings
  • AVIATIONEU NEW ERA ISO 3601 / DIN 3771 O-Rings

AVIATIONEU NEW ERA ISO 3601 / DIN 3771 O-Rings SKU: AVEUNE-ORNG-ISO3601/DIN3771

The German DIN 3771 standard refers to all O-rings as sealing elements for fluid technology and identifies O-Ring sizes by their Inner Diameter (ID) &Cross Section (C/S). This standard has essentially been incorporated into the international standard ISO 3601 which sets the globally relevant O-ring dimensions and uniform rules for installation spaces and the properties of the O-rings. It defines metric O-rings according to the same dimension chart as DIN 3771 while it has been extended to include O-rings in imperial dimensions. ISO 3601 also goes beyond the German standard in the area of materials containing material requirements for O-rings that far exceed those of DIN 3771.

Elastomer materials suitable for certain sealing situations are referred to by their abbreviation according to DIN ISO 1629 and include: 

Nitrile/Buna-N (NBR), presently the seal industry’s most widely used elastometer, Ethylene-Propylene (EPM/EPDM) used extensively for outdoor, weather-resistant uses and water applications, 

Silicone (MQ, PMQ, VMQ, PVMQ) especially resistant to high, dry heat in primarily static applications, 

Neoprene® (Chloroprene) (CR) developed as oil-resistant substitute for natural rubber with resistance to ammonia and Freon® and therefore a superior sealing material for the refrigeration industry, 

Fluorocarbon compounds (FPM / Viton®) / (Fluorel®) (FKM) combining high-temperature toughness with wide chemical agent compatibility, and 

Fluorosilicone (FVMQ) combining the good high and low temperature stability of silicones with the fuel, oil and solvent resistance of fluorocarbons.

ISO 3601 / DIN 3771 standard O-rings are offered as part of our own (AVIATIONEU NEW ERA) product lines. Sourced from quality manufactuurers they are supplied in competitively priced packs in different materials, sizes, and hardnesses as specified by a two-digit Shore A durometer number,ranging from 20 (soft) to 90 (hard), depending on the type of elastomer.

For additional information please consult the Product Description section or contact us.

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ISO 3601 / DIN 3771 standard O-rings are offered as part of our own (AVIATIONEU NEW ERA) product lines. Sourced from quality manufactuurers they are supplied in competitively priced packs in different materials, sizes, and hardnesses as specified by a two-digit Shore A durometer number,ranging from 20 (soft) to 90 (hard), depending on the type of elastomer with most commonly used durometer being the number 70. The DIN 3771 and ISO 3601 standards are brifly presented below with additional information on different elastomer materials. 

The DIN 3771 standard issued by the Duetsches Institut für Normung (German Institute for Standards) refers to all O-rings as sealing elements for fluid technology and identifies O-Ring sizes by their Inner Diameter (ID) &Cross Section (C/S) ranging from .74 mm to 658.88 mm and  1.02 mm to 6.99 mm respectvely. The size may be followed by a letter indicating the quality level (N – O-rings with a general field of applications & S – higher quality standard), and a code indicating the rubber polymer and IRHD hardness. Other standards, such as AS568, BS 1806, JIS B2401, NF T47-501, and SMS 1586 were also developed by national standards organizations to satisfy the needs of their national industries.The DIN 3771 standard has essentially been incorporated into the international standard ISO 3601 which sets the globally relevant O-ring dimensions and uniform rules for installation spaces and the properties of the O-rings. The ISO 3601 standard has a structure of five parts overlaping with those of DIN 3771. It defines metric O-rings according to the same dimension chart as DIN 3771 while it has been extended to include O-rings in imperial dimensions. ISO 3601 also goes beyond the German standard in the area of materials containing material requirements for O-rings that far exceed those of DIN 3771.

Elastomer materials suitable for certain sealing situations are referred to by their abbreviation according to DIN ISO 1629 and include:

Nitrile/Buna-N (NBR), presently the seal industry’s most widely used elastometer. It combines excellent resistance to petroleum-based oils and fuels, silicone greases, hydraulic fluids, water and alcohols. Features a good balance of such desirable working properties as low compression set, high tensile strength and high abrasion resistance.

Ethylene-Propylene (EPM/EPDM). Features good resistance to such polar solvents as ketones (MEK & Acetone) and also effective resistance to steam (to 400° F), hot water, silicone oils and greases, dilute acids and alkalies, alcohols and automotive brake fluids.

Silicone (MQ, PMQ, VMQ, PVMQ). Especially resistant to high, dry heat in primarily static applications. Silicones are fungus resistant, odorless, tasteless, non-toxic elastomers and possess high-resistance to the aging effects of both sunlight and ozone attack.

Neoprene® (Chloroprene) (CR). Developed as oil-resistant substitute for natural rubber, Neoprene features moderate resistance to petroleum oils, good resistance to ozone, sunlight and oxygen aging, relatively low compression set, good resilience, reasonable cost, and high resistance to attack by Freon® and Ammonia.

Fluorocarbon (FPM / Viton®) / (Fluorel®) (FKM). Fluorocarbon compounds combine high-temperature toughness with wide chemical agent compatibility,  and feature excellent resistance to petroleum products and solvents and good high-temperature compression set characteristics. The designations FPM, FKM and Viton® very often cause confusion although they all relate to one single base material. FPM is the international abbreviation according to DIN/ISO, FKM is the short form for the fluoroelastomer category according to the American standard ASTM while Viton® is the registered trade mark of DuPont Performance Elastomers.

Fluorosilicone (FVMQ). Combines the good high and low temperature stability of silicones with the fuel, oil and solvent resistance of fluorocarbons. FS compounds feature good compression set and resilience properties and they are suitable for exposure to air, sunlight, ozone,chlorinated and aromatic hydrocarbons.

AVEUNE-ISO3601/DIN3771-NBR-2.57X1.78-70A/PK100

Data sheet

Certification/Approval
Certificate of Conformance
Taric
4016931000 Gaskets, washers, rings and other seals of vulcanized rubber (other than hard rubber)
Unit of Measurement (UOM) / Sale
Piece (pc.)

Specific References

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