Ball valves only need a 1/4 convert to go from thoroughly open to completely closed. This would make them top-quality in applications needing fast shutoff in comparison with possibilities like gate valves. The reduced port ball valves are also referred to as RB or diminished bore valves. In this valve, https://stephenesfqb.wikiconversation.com/7214393/details_fiction_and_pipe_flanges_and_fittings