These attributes make them an excellent option for shutoff and control purposes, the place they are often most popular to gates and globe valves, However they absence their high-quality Command in throttling applications. Ball valves in sizes approximately two inch generally come in one piece, two or three piece patterns. http://trevorbqdrd.livebloggs.com/209237/helping-the-others-realize-the-advantages-of-hydraulic-ball-valve