??Relationship between life and temperature of rubber O ring

??Xinhua Xu rubber products company for the influence factors of introduce the effect of rubber O ring permanent deformation. There are many reasons for the deformation of rubber O ring, which has an important influence on the temperature of the factors. High temperature will accelerate the aging of rubber materials.

??There are many factors affecting the rubber O ring, and it is introduced that the temperature effect, the higher the temperature of the working environment, the greater the compression of the rubber O ring. When the deformation rate of 40% or more, that there will be leakage, so several sizing of the boundaries of heat: Xin Huaxu NBR 70 DEG C, Xu Xinhua ternary ethylene propylene rubber 100 DEG C, Xinhua Xu fluorine rubber and 140 DEG C. The initial formation of the rubber material O type ring due to compression deformation stress value with O ring relaxation process and the temperature drop effect gradually decreased or disappeared.

??The temperature is too high or too low rubber O ring collection will affect the O ring rubber material Chinese standard size change under the different temperature table. Rubber O ring of the same material, at the same temperature, compression rate is low O type large diameter ring section.

??The temperature in the rubber O - Ring - work, the initial compression may be due to sharply reduce the temperature decrease or disappear completely. At -50~-60 deg.c, not cold resistant rubber material will completely lose the initial stress; even if the low temperature resistant rubber material, the initial stress and initial stress is not greater than 20 DEG C 25%. This is because the initial rubber O ring compression depends on the linear expansion coefficient. So, choosing the initial amount of compression, we must ensure that in the relaxation process due to temperature drop caused by stress and decreased after sealing ability enough. The temperature in the O ring - work, special attention should be paid to the recovery index and deformation index of rubber materials.

??In summary, in the design should as far as possible to ensure that rubber O-rings with suitable temperature, or selection of high and low temperature resistant rubber O-ring materials, to extend the service life.

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