The internal thread ball valve and the flange gate valve are the same type of valve, the difference is that its closing part is a sphere, and the sphere rotates around the center line of the valve body to achieve opening and closing. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. Two-piece ball valve and three-piece ball valve are a new type of valve that has been widely used in recent years.

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

  1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length.

  2. Simple structure, small size and light weight.

3. It is tight and reliable. At present, the sealing surface material of ball valve is widely used plastic, which has good sealing performance, and has also been widely used in vacuum system.

4. Easy to operate, quick to open and close, only need to rotate 90° from fully open to fully closed, which is convenient for long-distance control.

5. The maintenance is convenient, the ball valve has a simple structure, the sealing ring is generally movable, and it is more convenient to disassemble and replace.

6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and when the medium passes through, the valve sealing surface will not be eroded.

7. It has a wide range of applications, with diameters ranging from small to several millimeters to several meters, and can be applied from high vacuum to high pressure.

The external thread ball valve can be divided into straight-through type, three-way type and right-angle type according to its channel position. The latter two ball valves are used to distribute the medium and change the flow direction of the medium. The installation and maintenance of the external thread ball valve should pay attention to the following matters:

1. Leave the position where the valve handle rotates.

2. Cannot be used as throttling.

3. The ball valve with transmission mechanism should be installed upright.

Threaded ball valve features:

The main features of the ball valve are its compact structure, reliable sealing, simple structure and convenient maintenance. It is also suitable for medium with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene, etc., and is widely used in various industries. The ball valve body can be integral or combined.