A Ball valve is designed as a fluid inlet/outlet. It can be installed on top of a tank or tanker as top discharge provision, or at the bottom as part of a bottom outlet. Different sizes are available ranging from ND40 to ND100. Ball valves can have a straight or a flanged outlet depending on the application. The Perolo range comprises regular ball valves and self-contained ball valves that exceed the requirements of a T22 tank and offer a very high protection.