Full Port Ball Valve has an oversized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted, but the valve is larger. Full Port Ball Valves with Teflon seats and seals, carbon steel body and stainless steel ball and stem are recommended. Full port ball valves are ideal for component isolation. In their fully opened position, they create very little flow interference or pressure drop.