Ball Valves are Manufactured with Full Port/Regular Port constructions. Where the application requires minimal pressure drop, the user is advised to opt for Full port construction. When a Ball Valve is chosen to replace a Gate Valve, the obvious choice is a Full Port Ball Valve. But when pressure drops are acceptable or if regulating valves such as globe valves are replaced on the line with Ball valves, Regular Port Design would be quite adequate. Full port and Regular Port Ball valves, are identical to each other with regards to the dimensions.