Valves play an important duty in a multitude of industrial applications, specifically in the oil and gas field. Amongst one of the most remarkable kinds of valves utilized are the fully welded ball valve, the trunnion mounted ball valve, the metal seated ball valve, and different forms of butterfly valves http://brewwiki.win/wiki/Post:Cameron_Ball_Valves_in_Oil_and_Gas_Industry_for_Quality_and_Reliability