Fluorine rubber o-rings to identify methods are there? Shanghai excellent sealing most at ease! How to use a simple method to distinguish between fluorine rubber O-ring and other O-rings with a black FKM fluorine rubber O-rings and EPDMO ring together, just from the appearance it is indistinguishable out. Need the help of some small aids can distinguish out. 1, the combustion method: Both were lit o-rings, which left after a fire source does not automatically turn off, will continue to burn for EPDM O-ring. And after another leave the fire will go out automatically compared VITON fluorine rubber O-ring. 2, the proportion method: Density FKM / VITON fluorine rubber O-ring is generally about 1.9, and the density EPDMO-ring is generally about 1.2. Therefore, the same size of the heavier fluorine rubber o-ring. Factors affecting the fluorine rubber O-ring failure: 1, permanent deformation and medium pressure operating pressure of the working medium can be said to cause permanent deformation of the main reasons fluorine rubber O-ring. Typically, the higher the operating pressure, the hardness of the seal material should also be higher. In order to meet the requirements of different conditions, the general should consider a new formula to increase the flexibility of the material (particularly increased elastic at low temperatures), lowering the compression permanent deformation of the material. 2, permanent deformation and compression and tensile amount of fluorine rubber O-ring seal is to rely on its in compressed or stretched state, stress and elastically deformed sealing. Currently, in the design and use, will try to increase the cross-sectional dimensions of O-ring and try to use low hardness of the material, thereby reducing the compression ratio to prevent permanent deformation conditions. 3, one of the important reasons for the permanent deformation temperature and the temperature of the rubber material is not only accelerate aging, as well as O-ring is an important factor in the impact of permanent deformation. Imported fluorine rubber o-rings, the initial stress formed by compression deformation will be with the relaxation process and temperature O-ring decline gradually reduce the role that disappear. Such as when working in sub-zero temperatures, the initial compression may be due to a sharp decrease in temperature decreases or completely disappear. Therefore, in the design and use must try to ensure that the seal has a suitable temperature, corresponding to the selection, such as the use of high temperature and low-temperature O-ring material for long life. Address: Huangpu District, Shanghai, Guizhou Road 259. Contact: Manager, An Jingli. Website: http: //www.shyqmf.com Phone:. 021-63502938,13585654469,15102112223, QQ2258844738.