... -0.1 electric single, double flat gate valves The Valve Series electric single double flat gate valves DLVds -0.1 electric single, double flat ... weight, flexible operation, raplace singly. DLVds -0.1 electric single, double flat gate valve adopts the high quality carbon steel ... .Three, working principle Nantong middlings DLVds -0.1 electric single, double flat gate mainly by the framework, screw nut ...