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ENCAPSULATED OR 240,67X6,99 VMQ + FEP (BS448-AN76-R76)
Family: Encapsulated OR
Dimensions : 240.67 x 6.99
Material: FEP
Color:
RED
Part number: E0240670699S318T160
Weight : 42.0000 gr.
Customs tariff code: 39269097
Country of origin: GB
ENCAPSULATED OR 240,67X6,99 FPM + FEP (BS448-AN76-R76)
Family: Encapsulated OR
Dimensions : 240.67 x 6.99
Material: FEP
Color:
BLACK
Part number: E0240670699FKMFEP
Weight : 45.3400 gr.
Customs tariff code: 39269097
Country of origin: CN
ENCAPSULATED OR 240,67X6,99 PEROXYDE EPDM (FDA-Compliant) + FEP (BS448-AN76-R76)
Family: Encapsulated OR
Dimensions : 240.67 x 6.99
Material: FEP
Color:
BLACK
Part number: E0240670699EPDMFEP
Weight : 41.3000 gr.
Customs tariff code: 39269097
Country of origin: GB
ENCAPSULATED OR 243,00X6,00 FPM + FEP
Family: Encapsulated OR
Dimensions : 243.00 x 6.00
Material: FEP
Color:
BLACK
Part number: E0243000600FKMFEP
Weight : 33.5500 gr.
Customs tariff code: 39269097
Country of origin: CN
ENCAPSULATED OR 245,00X5,33 FPM + FEP
Family: Encapsulated OR
Dimensions : 245.00 x 5.33
Material: FEP
Color:
BLACK
Part number: E0245000533V361T160
Weight : 34.5000 gr.
Customs tariff code: 39269097
Country of origin: GB
ENCAPSULATED OR 247,00X6,99 FPM + FEP (BS680)
Family: Encapsulated OR
Dimensions : 247.00 x 6.99
Material: FEP
Color:
BLACK
Part number: E0247000699FKMFEP
Weight : 59.3500 gr.
Customs tariff code: 39269097
Country of origin: CN
ENCAPSULATED OR 247,02X5,33 FPM + FEP (BS376)
Family: Encapsulated OR
Dimensions : 247.02 x 5.33
Material: FEP
Color:
BLACK
Part number: E0247020533V361T160
Weight : 34.4000 gr.
Customs tariff code: 39269097
Country of origin: GB
ENCAPSULATED OR 247,26X3,53 FDA VMQ + FEP (BS273)
Family: Encapsulated OR
Dimensions : 247.26 x 3.53
Material: FEP
Color:
RED
Part number: E0247260353VMQFEP
Weight : 12.0000 gr.
Customs tariff code: 39269097
Country of origin: GB
ENCAPSULATED OR 249,70X5,33 FPM + FEP
Family: Encapsulated OR
Dimensions : 249.70 x 5.33
Material: FEP
Color:
BLACK
Part number: E0249700533V361T160
Weight : 35.4000 gr.
Customs tariff code: 39269097
Country of origin: GB
ENCAPSULATED OR 250,00X5,00 VMQ + FEP
Family: Encapsulated OR
Dimensions : 250.00 x 5.00
Material: FEP
Color:
RED
Part number: E0250000500MVQFEP
Weight : 23.7000 gr.
Customs tariff code: 39269097
Country of origin: CN
ENCAPSULATED OR 253,00X4,00 VMQ + FEP
Family: Encapsulated OR
Dimensions : 253.00 x 4.00
Material: FEP
Color:
RED
Part number: E0253000400MVQFEP
Weight : 16.0000 gr.
Customs tariff code: 39269097
Country of origin: CN
ENCAPSULATED OR 253,37X6,99 FPM + FEP (BS449-AN77-R77)
Family: Encapsulated OR
Dimensions : 253.37 x 6.99
Material: FEP
Color:
BLACK
Part number: E0253370699V361T160
Weight : 60.2000 gr.
Customs tariff code: 39269097
Country of origin: GB
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Encapsulated O-rings, ideal in hostile environments
Encapsulated O-Rings consist of a seamless and uniform PTFE encapsulation which entirely encloses a VMQ-made or FPM-made core. They combine the resilience and sealing force of an elastomer with the chemical resistance of PTFE. This produces an elastomeric PTFE ring with high sealing capability.
Unlike traditional O-rings, encapsulated O-Rings are resistant to solvents and are chemically inert (except for attack by alkaline metals, fluorine and some halogenated compounds at high temperatures). In addition, they have a great resiliency substantially equal to those of elastomers and FEP has a very low friction coefficient. Last but not least, their gas permeability is very low.
This is why we highly recommend their use in chemically hostile environments.
Fitting of Encapsulated O-Ring
To minimize the potential damage to encapsulated OR during its fitting, it is essential to get it done it with total care since approximately 90% of the detected trouble are due to improper installation or housing design mistakes.
Installation on a rod
To insert an encapsulated OR to an internal groove can be quite complicated as it is about the seal to collapse into a smaller diameter than the gland it is being fitted into. Therefore, in order not to damage the seal during its installation, we highly recommend pre-heating it in hot water (60 °C – 70 °C) for ten minutes.
It is important to replace the shaft immediately while the seal is still warm and flexible.
The correct fitting of an encapsulated OR to a solid piston head groove can be eased by using a fitting cone. In this case as well, our advice is to pre-heat the seal by immersion in hot water in order to gain elasticity.
Anyhow, in both cases, the seals can be damaged or broken. Unlike standard rubber O-Rings, encapsulated O-Rings cannot be stretched which makes their installation more difficult. And a bad installation may have serious failure consequences.
Encapsulated O-Rings, table of tolerances
Encapsulated O-Rings are usually fitted in the same housings than standard O-Rings so that tolerances are strictly the same. We recommend to use the table here below to build housings according to BS 1806 Imperial Standard
Section | Width (mm) | Height (mm) | ||||||
Static | Dynamic | Pneumatic | ||||||
1,78 | 2,362 | 2,489 | 1,422 | 1,524 | 1,549 | 1,600 | 1,626 | 1,651 |
2,62 | 3,556 | 3,683 | 2,083 | 2,210 | 2,286 | 2,362 | 2,388 | 2,438 |
3,53 | 4,750 | 4,877 | 2,794 | 2,997 | 3,099 | 3,175 | 3,226 | 3,277 |
5,33 | 7,137 | 7,264 | 4,267 | 4,521 | 4,674 | 4,801 | 4,902 | 4,953 |
6,99 | 9,525 | 9,652 | 5,588 | 5,893 | 6,147 | 6,274 | 6,426 | 6,477 |
Encapsulated O-Ring, capsules thickness
Section (mm) | Thickness FEP capsule (mm) | Section (mm) | Thickness FEP capsule (mm) |
1,78 | 0,203 | 5,70 | 0,508 |
2,00 | 0,203 | 6,99 | 0,508 |
2,40 | 0,254 | 8,00 | 0,508 |
2,62 | 0,254 | 8,40 | 0,508 |
3,00 | 0,254 | 9,50 | 0,508 |
3,53 | 0,305 | 10,00 | 0,508 |
4,00 | 0,305 | 12,00 | 0,762 |
5,00 | 0,381 | 18,00 | 0,762 |
5,33 | 0,508 | 20,00 | 0,762 |
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All about encapsulated O-Rings | News | JIOrings
Published : 08/15/2016 | Categories : Encapsulated ORThe encapsulated O-rings, the seals with an encapsulation that sets it apart We have decided to give the encapsulated O-rings the importance they have always deserved, creating a s [...]
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