Ball valve works in a way of quarter-turn type which uses a hollow, perforated and pivoting ball (called “floating ball”) to control flow through it. It is open when the ball’s hole is in line with the flow and closed when it is pivoted 90-degrees by the valve handle. The handle lies flat in alignment with the flow when open, and is perpendicular to it when closed, making for easy visual confirmation of the valve’s status.
Ball valves are durable, performing well after many cycles, and reliable, closing securely even after long periods of disuse. These qualities make them an excellent choice for shutoff applications, reaches fine control in throttling applications.
1. Small fluid resistance.Ball valve has the smallest fluid resistance among all of the valves,even if the reduced ball valve.2. Easier and convenient to be open and closed.Ball valve will be full open and full closed only if we turn the stem into 90°.3. Good sealing.The o-ring of the ball valve’s seat is usually make up with PTFE.And the sealing force increases with the pressure increase.4. Stem has good sealing.The stem only rotates around the stem when the ball valve is open or close,so the packing seal of the stem is hard to be destroyed.5. Ball valve only turn 90°when it’s open or closed,so it’s easy to be achieved automation control and remote control.6. Ball valves are usually glossy and smooth.It’s hard to deposit medium .