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Does the size 4.47 × 1.78 mean anything to you?

Mar 26, 2019 Category: O-Rings
Standard O-Ring Size

You won’t find more materials available anywhere else!

Whereas in the previous post we talked about the importance (or not) of size, this time we are going to talk about the relevance of a specific size. If you are asking yourself why, then just keep reading.

The JIOrings warehouses hold a stock of more than 30 million O-rings of different inside diameters, cross-sections, hardness, materials, approvals, colours… And only the client knows the real working conditions to which the seals will be subjected and the properties that need to be complied with.

Without wishing to be exhaustive, we would like to emphasise the importance of choosing the right o-ring. The use of seals is universal and you will see them in both static and dynamic applications, on the interior and exterior of machinery parts and in a wide range of sectors. Of course, the same seals are not used in the healthcare sector, where O-rings need to be resistant to fluid, inert, and not produce substances or alter the essential characteristics of the product, as the seals used in the hydraulic sector, where resistance to extrusion and oils is more important.

There is a specific size (4.47 x 1.78) that due to its consumption in different sectors (food, pharmaceutical, medicine, biotechnology, chemical, petrochemical, gas, aeronautics, electronics…), we have managed to create a huge stock of different materials and approvals.

Check out our stock of 4.47 x 1.78 O-rings

O0004470178CR7001O-Ring4.47 x 1.78CR70Black(BS008-AN3-2018-103)
O0004470178FFKMN894O-Ring4.47 x 1.78FFKM75 (Evolast® N894)Black(BS008-AN3-2018-103)
O0004470178IB5501O-Ring4.47 x 1.78NBR55Black(BS008-AN3-2018-103)
O0004470178IB8001O-Ring4.47 x 1.78NBR80Black(BS008-AN3-2018-103)
O0004470178IBM748O-Ring4.47 x 1.78NBR90Black(BS008-AN3-2018-103)
O0004470178IBNS7004KO-Ring4.47 x 1.78NBR70Black(BS008-AN3-2018-103)
O0004470178IBNS8012KO-Ring4.47 x 1.78NBR80Black(BS008-AN3-2018-103)
O0004470178IBNS9015KO-Ring4.47 x 1.78NBR90 (Nipol®)Black(BS008-AN3-2018-103)
O0004470178JA5002FO-Ring4.47 x 1.78VMQ50Blue(BS008-AN3-2018-103)FDA – Compliant
O0004470178JA7006FO-Ring4.47 x 1.78VMQ70Red(BS008-AN3-2018-103)FDA – Approved
O0004470178JA8013FO-Ring4.47 x 1.78VMQ80White(BS008-AN3-2018-103)FDA – Compliant
O0004470178JAS70R00EO-Ring4.47 x 1.78VMQ70Red(BS008-AN3-2018-103)For gas
O0004470178LPE70N00CO-Ring4.47 x 1.78EPDM70 PeroxideBlack(BS008-AN3-2018-103)FDA – Compliant
O0004470178LPM534O-Ring4.47 x 1.78EPDM70 PeroxideBlack(BS008-AN3-2018-103)FDA – Approved for drinking water
O0004470178OZ7501FO-Ring4.47 x 1.78FPM75Black(BS008-AN3-2018-103)FDA – Approved
O0004470178OZ819001O-Ring4.47 x 1.78FPM80Brown(BS008-AN3-2018-103)
O0004470178OZ910701O-Ring4.47 x 1.78FPM90Black(BS008-AN3-2018-103)
O0004470178OZV80V00EO-Ring4.47 x 1.78FPM80Green(BS008-AN3-2018-103)
O0004470178OZVA7523KO-Ring4.47 x 1.78FPM75 (Viton®)Black(BS008-AN3-2018-103)
O0004470178OZVG70I00O-Ring4.47 x 1.78FPM70Green(BS008-AN3-2018-103)For gas
O0004470178TH7003O-Ring4.47 x 1.78HNBR70Green(BS008-AN3-2018-103)
O0004470178FE8001O-Ring4.47 x 1.78FEPM80 (Aflas®)Black(BS008-AN3-2018-103)
O0004470178LP8001PFAO-Ring4.47 x 1.78EPDM80 PeroxideBlack(BS008-AN3-2018-103)FDA – Approved for drinking water
O0004470178IB7001FO-Ring4.47 x 1.78NBR70 FDABlack(BS008-AN3-2018-103)
O0004470178FS7002O-Ring4.47 x 1.78FVMQ70Blue(BS008-AN3-2018-103)
O0004470178PT17301O-Ring4.47 x 1.78PTFEWhite(BS008-AN3-2018-103)FDA – Compliant
O0004470178PU9012O-Ring4.47 x 1.78PU90Translucent(BS008-AN3-2018-103)

Basic information on the materials used

Acrylonitrile butadiene rubber (NBR) is the most widely used material in O-rings due to its excellent mechanical properties, resistance to abrasion, low permeability to gases and high resistance to mineral oils and greases. [More information about NBR]

Ethylene Propylene Diene Rubber or EPDM is an elastomer thermopolymer that provides good resistance to abrasion and wear for O-rings. [More information about EPDM]

The term silicone includes a large group of materials of which VMQ (vinyl-methyl-silicone) is one. Silicone elastomers have may useful properties, the most noteworthy of which are good heat resistance and low-temperature flexibility. There are also highly resistant to ozone and the passage of time, in addition to having good insulating and physiologically neutral properties. [More information about VMQ]

FPM is a fluoroelastomer obtained from the derivation of synthetic rubber and elastomer fluoropolymer. O-rings manufactured from this material provide greater elasticity and resistance than other types of rubber, in addition to possessing high resistance to highly aggressive fluids, good resistance to deformation, excellent sealing force retention and the original hardness of the design. [More information about FPM-Viton®]

FFKM Evolast®
Perfluoroelastomer-made (FFKM Evolast®) O-rings are designed to combine the needs of chemical and thermal resistance provided by the PTFE and the sealing properties typical of elastomers. One of the advantages of seals made with FFKM is the wide range of temperatures they are capable of withstanding. [More information about FFKM Evolast®]