Manual ball valves are a type of valve operated manually using a lever or handwheel to control the flow of liquids or gases through a spherical closure unit with a central hole. Known for their durability and tight sealing capabilities, they provide reliable shutoff and simple flow regulation in a variety of applications, such as plumbing systems, chemical processing, and oil and gas operations. Manual ball valves offer a cost-effective solution with low maintenance needs, fast quarter-turn operation, and minimal pressure loss, making them ideal for systems where automation is not required and quick manual control is sufficient.