In polysilicon, coal chemical industry, power plant ash, mud and boiler slag discharge and other material in the pipeline, valve sealing parts not only by the seal parts of sliding friction and wear, and bear high temperature and high hardness, high speed impact gas-solid two phase mixture, and the high pressure fluid caused by flash and cavitation, resulting in damage, increase the valve failure. Therefore, powder conveying harsh working conditions, such as abrasion resistance became an important valve performance appraisal indicators.
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