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How to choose the material of rubber soft joint for vacuum pump

Time: 03-03 󰃯 Reading times: 1018 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: Shanghai Luoying rubber joint manufacturer specializes in the production of American standard rubber joint, long-term export to the world. American standard rubber joint is also called American standard rubber soft joint, American standard high pressure rubber joint, rubber compensator, etc. If it can be used in a variety of long distance pipeline compensation

Shanghai Luoying Rubber joint The manufacturer specializes in the production of American standard rubber joint, long-term export to the world. American standard rubber joint is also called American Standard Rubber flexible joint American standard high pressure rubber joint, rubber Compensator Etc. If it can be used in long distance compensation connection of various pipelines, it can compensate long-distance pipeline displacement, absorb pipeline vibration, eliminate noise, digest and absorb compensation pipeline radial offset.

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In the power plant circulating water pipeline, lime slurry desulfurization pipeline and its pulverized coal type pipe, the ventilation pipe can be installed and used, which reduces the noise caused by pipeline vibration caused by centrifugal pump vortex in fire pump room, which is very large-scale pipeline. Friction resistance is installed in desulfurization tower of lime slurry desulfurization pipeline Flexible rubber joint This kind of rubber soft joint is made of EPDM, which has the characteristics of wear resistance and corrosion resistance, and has a long service life.

(1) the selection of rubber type of soft joint needs both sealing performance and weight loss rate, and the actual rubber type should be determined according to the vacuum value. Generally, the products specified by low vacuum pump (such as vacuum packaging rubber hose of bulb factory) can be applied with pure natural rubber. High temperature resistant acrylonitrile rubber is required for both high temperature and weight-loss of acrylonitrile rubber. For the crafts with high vacuum resistance, fluororubber should be used as far as possible.

(2) it is necessary to fully consider the high temperature resistance and very high vacuum pump rubber before delivery. Therefore, the high temperature resistance of the main raw material also needs to have both. That is to say, in addition to the vacuum pump resistance, the rubber also needs to withstand the high temperature of the kebab before it can be suitable for application under 10-6 ~ 10-7 or higher regulations. Therefore, it is necessary to use the rubber Fluororubber and nitrile rubber with high acrylonitrile water content.

(3) selection of the mixture for rubber soft joint. Because of the low evaporation point and large usage, the tackifier should be avoided or unnecessary. Although the amount of antioxidant used is not large, it is easy to volatilize and should be used less. The filler is not suitable for the application of silica, but suitable carbon black can reduce the hydrophilicity of vapor and is beneficial to the vacuum pump resistance.

(4) the strength of the ball must be ensured in the practice of the rubber soft joint, otherwise, it is easy to be squeezed and flattened in the vacuum pump and the pipeline is not smooth.