The three piece internal thread ball valve is actually commonly referred to as a three piece ball valve. The three piece ball valve is composed of a left and right body and a 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 threaded ball valve seat adopts an elastic sealing structure, which is reliable and easy to open and close. The valve stem adopts a bottom mounted structure with an inverted seal. When the valve chamber experiences abnormal pressure rise, the valve stem will not be flushed out.

The structural characteristics of internal threaded ball valves:

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 the ball valve is widely used in plastic, with good sealing performance, and has also been widely used in vacuum systems.

4. Easy to operate, quick to open and close, with only a 90 ° rotation from full open to full close, facilitating remote control.

5. Easy to maintain, the ball valve has a simple structure, and the sealing ring is generally movable, making disassembly and replacement more convenient.

When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium. 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 applied from high vacuum to high pressure.