Ball valve is a quarter-turn valves, perforation and spin control flow. It is open, when the ball hole to accord with the flow and closing valve rod rotated 90 degrees. Open handle when lying down in line with the flow and perpendicular to its closing, vision is easy to confirm the status of the valve.
Ball valve is durable, well after many cycles, safe and reliable, shut down even if stop using for a long time. These qualities make them a good option for closing and control applications, they often tend to gates and globe valves, but they lack the fine control throttling applications.
Related recommendation:
Class 150 Carbon Steel Ball Valve
API6D Class 600 Carbon Steel Ball Valve
API6D Class 300 Carbon Steel Ball Valve