O-ring Elastic And Resilient
In the choice of O-ring material, the first consideration should be considered with the working medium compatibility, followed by the seal must also consider the pressure, temperature, continuous working hours and other conditions. Although the performance of the material can directly affect the performance of the O-ring, but in addition to the general requirements of the sealing ring material should be, O-ring also pay attention to the following conditions:
First, flexible and resilient.
Second, the appropriate mechanical strength, including expansion strength, elongation and tear strength.
Third, the performance is stable, not easy to swell in the medium, heat shrinkage effect is small.
Four, easy to shape, and to maintain the precise size.
Five, do not corrode the contact surface, do not pollute the media and so on.
First, O-shaped rubber seal is a circular shape of the sealing element, it is widely used in a variety of mechanical equipment, in a certain temperature, pressure and different liquid or gas medium to play a sealed role, and other seals Circle, compared with the following advantages:
①, sealed parts of the structure is simple, the installation site is compact, and lighter weight.
②, self-sealing effect, often only one seal will be able to complete the sealing effect.
③, good sealing performance, used as a fixed seal when almost no leakage, used as a sports seal, only when the speed is high when some leakage.
④, movement friction resistance is very small, for the occasion of the pressure can also be adapted.
⑤, size and groove has been standardized, low cost, easy to use, easy to use and outsourcing.
Compared with other seals, there are three problems:
①, starting the frictional resistance.
②, used as a pneumatic device seal, you must add lubricating oil to prevent wear.
③, the coupling parts, such as the movement surface, grooves, gaps and other processing size and accuracy requirements are very strict.
O-ring for hydraulic pneumatic systems and a variety of mechanical equipment and components, in the specified pressure, temperature and o circle of different liquid and gas medium, in the static or motion state from the sealing effect. Working temperature: -40 ~ + 230 ℃. Working medium: air, water, oil. Material: nitrile rubber, silicone, fluorine plastic, ethylene propylene rubber.