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CF (VSSJAFG) single dowel joint flange is a loose set of expansion joint and short tube flange, dowel screw and other artifacts, it is the equipment such as pumps, valves and pipe connection of new products, connected by the bolt, to make it as a whole, and adjust the quantity to a certain extent, so that you can at the time of installation and maintenance, according to the on-site installation size adjustment, at work, can put the axial thrust and also to the whole pipeline. This not only improve work efficiency, and on the pump, valve and pipeline play a protective role.