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The top entry ball valves are the valves that assemble the ball from the top end. It’s quite similar to a globe valve that has a body and a cap, except that the trim portion uses a ball type. It consists of a single entity. Typically, the top entry ball valves are made of cast metal. Since it is made from casting, certain additional NDE tests would be required to ensure that there is no defect in the casting process. Top input ball valves are commonly used in applications requiring limited disassembly for in-line maintenance of their internal components. It is also very common to use high-pressure ball valve inputs that need constant maintenance such as HIPPS (High Integrity Pressure Protection System) valves, etc. The benefit of the top entry ball valve is its design that allows a limited thread interaction such that the potential leakage path can also be minimized.