The three piece internal thread ball valve is actually what is commonly known as a three piece ball valve. The three piece ball valve is composed of three parts: the left and right body and the middle body. The two-piece ball valve refers to a valve assembled from two parts, and the one-piece ball valve is a wide type ball valve. Their difference lies in whether they are easy to disassemble, for example, a three piece ball valve is * easy to disassemble.

 

Working principle of internal thread ball valve

 

The internal thread ball valve seat adopts an elastic sealing structure, which is reliable in sealing and easy to open and close. The valve stem adopts a bottom mounted structure with reverse sealing, and the valve stem will not be flushed out when the valve chamber is abnormally pressurized.

 

Structural characteristics of internal thread ball valve:

 

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

 

2. Simple structure, small size, and light weight.

 

3. Tight and reliable, the sealing surface material of ball valves is widely made of plastic, with good sealing performance, and has also been widely used in vacuum systems.

 

4. Easy to operate, quick opening and closing, only need to rotate 90 ° from fully open to fully closed, making it convenient for remote control.

 

5. Easy maintenance, simple ball valve structure, and generally movable sealing rings make disassembly and replacement relatively convenient.

 

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

 

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