Three-piece ball valve installation and maintenance should pay attention to the following matters:

1. To leave the position of the valve handle rotation.

2. Cannot be used as a throttling.

3 ball valve with transmission mechanism should be mounted upright.

Second, eccentric ball valve working principle is to rely on rotary valve to make valves, butterfly valves, filters, ball valves, traps, hydraulic control valve unblocked or blocked. Ball Valve Switch Light, small size, can be made into a large caliber, sealing reliable, simple structure, easy maintenance, sealing surface and spherical surface is often closed, not easily by the media erosion, in various industries have been widely used.

Third, the insulation ball valve in the pipeline is mainly used to cut, allocate and change the flow direction of the medium. Ball valve is widely used in recent years a new type of valve, it has the following advantages:

1. The flow resistance is small and the resistance coefficient is equal to the same length of pipe.

2. Simple structure, small size, light weight.

3. Tight and reliable, the current ball valve sealing surface materials widely used plastic, good sealing, in the vacuum system has been widely used.

4. Easy to operate, open and close quickly, from open to full off as long as the rotation of 90 °, easy to control long-distance.

5. Convenient maintenance, simple structure of the ball valve, sealing ring is generally active, disassembly and replacement is more convenient.

6. In open or full closed, the ball and valve seat sealing surface and media isolation, media through, will not cause the valve seal surface erosion.

7. Wide range of application, path from small to several millimeters, large to a few meters, from high vacuum to high pressure can be applied. When the ball rotates at 90 degrees, the spherical surface should be all rendered at the inlet and outlet, thereby truncating the flow.

Thermal insulation ball valve is a relatively new type of ball valve, it has its own unique structure of some of the advantages, such as the switch without friction, seal is not easy to wear, the opening and closing torque is small. This reduces the specification of the assigned actuator. With multiple rotary electric actuator, the media can be adjusted and closely cut off. Widely used in petroleum, chemical, urban water supply and drainage requirements strictly cut off the working conditions.