Alloy ball valve is a alloy steel Material device that regulates the flow of fluids (either gases, fluidised solids, slurries or liquids) by opening, closing, or partially obstructing various passageways.Alloy ball valve is used in a variety of industrial, military, commercial, and residential applications.website:Alloy Ball valve,alloy gate valve,cast steel valve,forged valve---China ULO Valve CO.,LTD.