Internal screw ball valve and flange gate valve is the same type of valve, the difference is that its closing part is a ball, the ball around the center line of the valve body for rotation to open, close a valve. Ball valve in the pipeline is mainly used to cut off, distribution and change the direction of the flow of the medium. Two-piece ball valve, three-piece ball valve, is a new type of valve widely used in recent years.

First, ball valve with external thread has the following advantages:

1. Fluid resistance is low, its resistance coefficient is equal to that of the same length of pipe.

2. Simple structure, small volume, light weight.

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

4. Easy to operate, open and close quickly, from fully open to fully closed as long as the rotation of 90 degrees, easy to remote control.

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

6. When fully open or fully closed, the sealing surface of the ball and the seat is isolated from the medium. When the medium passes through, it will not cause the erosion of the sealing surface of the valve.

7. Wide range of application, small to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied.

Ball valve with external thread can be divided into straight - through, three - way and right - Angle according to its channel position. The latter two ball valves are used to distribute media and change the flow of media. Installation and maintenance of ball valve with external thread should pay attention to the following:

1. Leave the position for the valve handle to rotate.

2. Cannot be used as throttling.

Ball valve with transmission mechanism should be installed upright.

Screw ball valve features:

The main characteristics of ball valve are compact structure, reliable sealing, simple structure, convenient maintenance, sealing surface and sphere are often in a closed state, not easy to be washed away by the medium, easy to operate and maintain, suitable for water, solvent, acid and natural gas and other general working media, but also suitable for poor working conditions of the medium, such as oxygen, hydrogen peroxide, methane and ethylene. It is widely used in various industries. Ball valve body can be integral, can also be combined.