Ball valve is evolved from plug valve, using a ball as ball as closure member. The ball rotates with axis of stem to open or close valve. Ball valve is used to cut off, distribute or change the flow direction of medium. Ball valve with V shape mouth has good function of flow regulating. 

 

Characteristics of ball valve

Ball valve has the advantages of simple structure, good seal, low volume, light weight, small sizes, convenient usage, etc. Ball valve has become one of categories which developing highly. The usage of ball valve is quite wide especially in the U.S., Japan, Germany, France, Italy, UK and other developed countries. Category and number continue expanding. Ball valve is developing into high temperature, high pressure, large caliber, long service life, multifunction. It has taken place of gate valve, globe valve and check valve partly. Ball valve will become leading category in industries. 

Ball valve depends on rotating stem to open or close valve. The advantages of ball valve include convenient maintenance, reliable seal, simple structure. The seal face has good corrosion resistance which cannot be corroded by medium. 

 

Advantages of ball valve:

1. Have low fluid resistance.

2. Have simple structure, low volume and light weight.

3. Reliable seal. 

4. Convenient operation.

5. Convenient maintenance.

6. The seal face is insulated from medium. When medium passing through, the seal face cannot be corroded. 

7. Have wide applicable range.

 

Ball valve has been widely utilized in petroleum, chemical industry, food, pharmacy, electricity, mineral, electricity, etc. including daily life.