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    升降式止回阀

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    该阀是通过阀瓣在盖套里的上下运动完成对介质的止回作用的,其密封面采用堆焊钴基硬质合金的形式,作为防止介质倒流的设备,因其耐磨性好,广泛用于电站、制药、化工、石油等行业。