A ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. The sphere has a hole, or port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle or lever will be inline with the port position letting you "see" the valve's position. The ball valve, along with the butterfly valve and plug valve, are part of the family of quarter turn valves.
Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse.
Ball valve are used extensively in industrial applications because they are very versatile, supporting pressures up to 1000 bars and temperatures up to 200 o C. Sizes typically range from 0.5 cm to 30cm. They are easy to repair and operate.
The body off ball valves may be made of metal, plastic or metal with a ceramic center. The ball is often chrome plated to make it more durable. A ball-check valve is a type of check valve with a ball without a hole for a disc.
Types of ball valve :- There are five general body styles of ball valves : single body, three piece body, split body, top entry. Read More ...