A hollow, perforated, and pivoting ball is used to control liquid flow through a ball valve. While open, it remains closed when the ball’s hole is rotated 90 degrees by the handle and blocks flow, preventing water from flowing in and out. Ball valves are long-lasting and reliable, even after long stretches of inactivity, making them ideal for use in corrosive environments. This makes them a good choice for shutdown and control applications, where they are typically…