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Standard O Rings Do You Know?

Doit Rubber Products Co.,Ltd | Updated: Sep 25, 2017

Standard O Rings do you know?
Standard O Rings Features:
1, working medium and working conditions
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. If used in the rotation, should be considered due to friction heat caused by the temperature rise. Different sealing materials, its physical properties and chemical properties are not the same, see "rubber seal material properties table."
2, sealed form
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.
Axial installation, to consider the direction of pressure. Internal pressure, Standard O Rings outside diameter should be greater than the groove diameter d3 about 1 ~ 2%; external pressure, should make the Standard O Rings diameter than the groove diameter d4 about 1 ~ 3%.
Standard O Rings are suitable for use in a variety of mechanical equipment, in the specified temperature, pressure, and different liquid and gas medium, in a static or moving state from the sealing effect. In the machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, construction machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instruments, a large number of applications of various types of seals element. Standard O Rings are mainly used for static and reciprocating seals. For rotary motion seals, only for low speed rotary seals. Standard O Rings are typically mounted on a cylindrical or inner circle with a rectangular cross-section. Standard O Rings in the oil, acid, grinding, chemical erosion and other environments still play a good seal, shock absorption. Therefore, Standard O Rings is the most widely used seal in hydraulic and pneumatic transmission systems.
Rubber O-rings are suitable for use in petroleum-based hydraulic oils, glycol-based hydraulic oils, diester lubricants, gasoline, water, silicone grease, silicone oil and other media. Is the most widely used, the lowest cost rubber seals. Not suitable for use in polar solvents such as ketones, ozone, nitrohydrocarbons, MEK and chloroform. General use temperature range of -40 ~ 200 ℃. HNBR hydrogenated nitrile rubber O-ring: with excellent corrosion resistance, tear resistance and anti-compression deformation characteristics, ozone resistance, sunshine, weather resistance is better.
Rubber seals O-rings are widely used in internal combustion locomotives, automobiles, tractors, construction machinery, machine tools and a variety of hydraulic pneumatic components such as seals, can bear fixed, reciprocating and rotating movement of the seal, in the seal of mechanical goods Standard O Rings accounted for 50 %the above. As required, it is possible to produce a variety of special applications for high temperature, low temperature vacuum, high pressure and different media. Standard O Rings and profiled rubber sealing products. Standard O Rings compared with other types of Standard O Rings, has the following advantages:
1, suitable for a variety of sealed forms: static seal, dynamic seal
2, suitable for a variety of uses Materials, sizes and trenches have been standardized, interchangeable
3, suitable for a variety of sports: rotary motion, axial reciprocating motion or combined movement (such as rotary reciprocating motion)
4, suitable for a variety of different sealing media: oil, water, gas, chemical media or other mixed media