China Valve suppliers Product introduction - The products have passed ISO9001 and CE certification. - We provide one-stop sourcing and OEM service for you. Size Range1/2"~2", DN15~DN50 Operating Pressure1.6MPa Control ModeOn Off Type / Modulating Type Optional VoltageDC12~24V (卤10%), AC110~220V, 50/60Hz Body MaterialStainless Steel Disk MaterialStainless Steel Sealing MaterialEPDM, PTFE Stem MaterialStainless Steel Structure2 Way Ball Valve Connection TypeThread type BrandQOTO 1.What is the difference between a ball valve and a butterfly valve? A ball valve is a ball with a hole through it. A butterfly valve generally consists of a disk mounted on a rotating shaft. 2.How to know if a ball valve is open or closed? When the handle of a ball valve is parallel to the valve or pipe, it's open. When it's perpendicular, it's closed, If you use the electric ball valve, you can see the indicator to know the situation.China Valve suppliers website:http://www.qotosmart.com/valve/