Important things about rubber o ring

Nowadays, there are more and more rubber o ring manufactures, and there are also many kinds of rubber o ring, but there is no clear classification, most of manufactures produce their products according to their distributor, then turn it to their bland. They are almost moulds, the Error Radix may be occurred are decided by the data of customers, and it hasn’t its rule. We have to check and modify in the process of producing o ring , then fix, keep order at docking point. It will be in trouble if the docking point isn’t in order, it needs to adjust and fix at final part of welding division.

Rubber is a super elastic material, has a good reversible deformation capacity, and has the advantages of wear and corrosion resistance, is widely used in a variety of sealed places.[1-2] The structure of rubber o ring is simple and it can be installed easily, it is common seals. According to the rubber ring sealing mechanism of Roth, no rubber O ring can achieve zero leakage, the leakage rate is an important parameter of the design of the sealing device.Explosion containers are usually used in rubber O ring with the flange seal, the explosion damage can be limited to a certain extent, to provide protection for personnel, equipment, environment, etc.. But when the explosion product contains harmful

Material or the need to carry out explosive product analysis, the explosion of the work process requires strict containment, gas leakage rate must be less than 1 x m3/ s 10-7Pa.

After the explosion experiment?containers are usually produced in high temperature, high pressure of explosion products, container quasi static pressure increased, a large number of high-temperature filling in shock wave under the action of accumulation in the sealing flange, seal ring will face a test of high temperature, high pressure. Differential pressure is the driving force of sealing ring leakage, the higher the pressure difference is, the greater the leakage is ; high temperature easily lead to damage to the structure of the sealing ring, reduce contact stress, but also increase the leakage rate. Therefore, it is necessary to test the sealing performance of rubber O ring under different temperature and pressure difference, which provides reference for the selection and design of the sealing ring to ensure the safety of the explosive container.

Several kinds of material of o ring .

1.NBR

       Use in the temperature is under 90 degree of water.

   2.FPM( made in China)

       Use in normal temperature water or under 150 degrees  low temperature heat conduction oil .

   3.FPM(imported)

    Use in under 195 degrees low temperature heat conduction oil .

  4.FFKM( VITON, JINGJIA of Shanghai)

    Use in under 250 degrees low temperature heat conduction oil .

5.EPDM

   Use in under 150 degree hot water or very hot steam.