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Standard O Rings Are Used In Recent Years

Doit Rubber Products Co.,Ltd | Updated: Sep 04, 2017

Standard O Rings are used in recent years
Standard O Rings are one of the most widely used elastomers in recent years. Its greatest characteristic is good wear resistance, better than natural rubber, its strength and tear resistance, ozone resistance is also particularly excellent, but not resistant to ketones, acid, alkali, steam. The use of temperature range is generally -20 ~ 80 ℃. Usually used to do all kinds of wear-resistant products.
 Standard O Rings is one of the special synthetic rubber elastomer material, the price is more expensive than any kind of rubber, its use temperature range -25-250 ℃. Usually used for high temperature, acid, petroleum base oil, aromatic hydrocarbons and other media rotating seal (oil seal) or Standard O Rings rubber seal products.
Standard O Rings market price is undoubtedly expensive and its own use of the material is a great relationship, high cost is the main reason for price increases, followed by the achievement of production technology is also a key factor affecting the price, and Junda On this aspect of the technology has already reached the market requirements, worthy of choice.
 Standard O Rings is one of many Standard O Rings, most of the Standard O Rings using the sealing material is basically a high molecular elastomer, of course, the specific will be based on their own function, will join Some of the other materials, including the ratio between the different is not the same, but no matter how the change, all the Standard O Rings must be specific to the following performance:
1, with a certain mechanical and physical properties: such as tensile strength, tensile strength, elongation;
2, there is a certain degree of flexibility, hardness appropriate, and compression of permanent deformation is small;
 3, with the working medium to adapt, not easy to produce swelling, decomposition, hardening;
4, wear, have a certain tear resistance;
5, with high temperature, low temperature aging performance.
Of course, the above mentioned these requirements, not every one will have a very good, according to the different material ratio, the degree of achievement of these requirements will be how much difference, but ultimately for the production of the standard O The ring seal effect should be comprehensive.
 Standard O Rings are primarily subject to compression, and in theory there is no tensile strength. The Standard O Rings do not have problems, but in actual use, the Standard O Rings must have a basic tensile strength even in general Not only the need to make up the material, but also the Standard O Rings to resist the pressure medium tear or blow out the need. For the non-metallic Standard O Rings made by the usual compression method with various rubber bonded fiber reinforced sheets, the transverse tensile strength and the longitudinal tensile strength are often different and the former is often lower than the latter, The strength generally refers to the transverse tensile strength.
Other semi-metallic Standard O Rings and metal Standard O Rings have a much higher tensile strength than non-metallic sheets and are therefore not a major consideration. Standard O Rings manufacturers in the production of Standard O Rings when the Standard O Rings stretch is sure to take into account.
In the specific selection of Standard O Rings material, we must first consider the compatibility with the working medium. But also to consider the sealing of the pressure, temperature, continuous working hours, operating cycle and other working conditions. In the case of rotation, the temperature rise due to frictional heat should be taken into account. Different Standard O Rings material, its physical properties and chemical properties are not the same, see "rubber Standard O Rings material properties table."
According to the type of load can be divided into static seal and dynamic seal; according to the seal can be divided into holes with the seal, shaft seal and rotary shaft seal; according to its installation can be divided into radial installation and axial installation. For radial installation, the deviation between the inner diameter of the Standard O Rings and the diameter d2 should be made as small as possible for the shaft seal. For the hole seal, the inner diameter of the hole shall be equal to or slightly smaller than the diameter d1 of the groove.