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O-rings

O-rings are seals with a round cross section made of rubber, silicone, metal and plastic materials. Depending on the material, O-rings can meet a number of industry standards and regulatory approvals.


Overview: Standards and approvals complied by Betech's materials and production facilities

O-rings can be used to form static or dynamic seals and are used for many purposes in all sectors of industry. O-rings are, for example, used to seal lids, flanges, covers, valves and fixtures. O-rings are also widely used for sealing purposes in hydraulic equipment.

When O-rings are subjected to loading and pressure, they change form, completely filling the O-ring groove and gap. A complete seal is thus formed, ensuring that fluids, gases or contaminated particles cannot pass.

O-rings are generally moulded but can also be made from extruded rubber cord. Thanks to their simple shape, O-rings can be manufactured relatively cheaply and are easy to mount.

The type of rubber used is determined by the pressure, temperature and medium the O-ring will be subjected to.


Static applications

Examples of O-rings in static applications: axial, radial and in dovetail groove.

O-ringe anvendt radialt

Dynamic applications
Examples of O-rings in dynamic applications with reciprocating motion: Groove on the cylinder or groove on the piston.

Max. speed: 0.5 m/s

Examples of O-rings in dynamic applications which rotate or turn:

Recommended max. speed: 2.0 m/s


In general, it is not recommended to use O-rings in dynamic applications!

Contact us for technical clarification


Classification

At Betech, we work on the basis of three different classifications:

Low performance
O-rings that have no certifications or special requirements, such as seals for flashlights and watches.

Medium performance
O-rings with certifications. These might for example be for use in the food industry, or water and sanitation. The customer for medium performance O-rings might be, for example, a coffee machine manufacturer requiring foodstuffs and water certifications. This class typically includes customers in industries such as the food industry, the pharmaceutical industry, automation, marine, power/heating and HVAC.

This class also includes customers who are very demanding about tolerances.

High performance
O-rings used in industries such as oil/gas, refineries, marine and power/heating. The class includes customers who work in the extreme areas of the temperature spectrum for rubber, plastic or metal, i.e. temperatures from -250 ˚C to +260 ˚C (-420F to +500F).

 

Kvalitet (QA) og prekvalifikasjon

ISO 9001:2008
JQS Achilles (Oil & Gas)
Sellihca (Utillities)

Råvarer

Ethylene Propylene Diene Monomer | EPDM

Weather resistance (relative)
Excellent
Ozone resistance (relative)
Excellent
Oil resistance (relative)
Limited
Water resistance (relative)
Excellent
Wapor resistance (relative)
Excellent
Acids resistance (relative)
Excellent
Bases resistance (relative)
Excellent
Gas permeability (relative)
Average
Tensile strength (relative)
Good
Max. Operating temperature (Celsius)
150
Min. Operating temperature (Celsius)
-50
Hardness, from (shore A)
30
Hardness, to (shore A)
90
Hardness, from (shore D)
0
Hardness, to (shore D)
0
Elongation (relative)
Good
Compression set (relative)
Excellent
Vibration damping (relative)
Average
Abrasion resistance (relative)
God

Fluoronated Hydrocarbon | FPM

Weather resistance (relative)
Excellent
Ozone resistance (relative)
Excellent
Oil resistance (relative)
Excellent
Water resistance (relative)
Excellent
Wapor resistance (relative)
Good
Acids resistance (relative)
Excellent
Bases resistance (relative)
Average
Gas permeability (relative)
Average
Tensile strength (relative)
Limited
Max. Operating temperature (Celsius)
220
Min. Operating temperature (Celsius)
-46
Hardness, from (shore A)
50
Hardness, to (shore A)
95
Hardness, from (shore D)
0
Hardness, to (shore D)
0
Elongation (relative)
Limited
Compression set (relative)
Excellent
Vibration damping (relative)
Excellent
Abrasion resistance (relative)
Middel

Vinyl Methyl Silicone | VMQ

Weather resistance (relative)
Excellent
Ozone resistance (relative)
Excellent
Oil resistance (relative)
Average
Water resistance (relative)
Good
Wapor resistance (relative)
Average
Acids resistance (relative)
Good
Bases resistance (relative)
Average
Gas permeability (relative)
Limited
Max. Operating temperature (Celsius)
0
Min. Operating temperature (Celsius)
250
Hardness, from (shore A)
-70
Hardness, to (shore A)
0
Hardness, from (shore D)
0
Hardness, to (shore D)
0
Vibration damping (relative)
Limited
Abrasion resistance (relative)
Begrænset

Vi er her for å hjelpe deg

Ann Sørensen

Ann Sørensen

Henning Thunheim

Henning Thunheim

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