If you want to Wholesale Cast Steel Butterfly Valve, Please note that these:

Cut-off valve, stop valve, Globe valve) of the opening and closing is plug valve, sealing surfaces appear flat or cone, disc make linear movement along the centerline of fluid. Stem form of exercise, there is lifting lever (valve rod, the handwheel do't lift), there are also lift rotating lever (hand wheel rotating lifting with the valve stem and nut in the body). Globe valve such as Cast Steel Globe Valve used throughout close tu, do't allow to adjust and throttling.

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