Thereducedportvalve(reduced bore valve),which is a valve in contrast to the full port valve. Reduced port ball valves have an opening through the ball that is one pipe size smaller than the valves pipe size. It also has a flow restriction that bring a pressure drop as the flow passes through the opening.standard port valves can also be considered as one kind of reduced port ball valves.

Reduced Bore Ball Balve

Reduced Port Ball Balve