The difference between stainless steel one-piece ball valve and two-piece three-piece ball valve

First of all, the one-piece ball valve is a manual valve, the structural design is integral, and the ball is stabilized by a plug head, so that it can be convenient in maintenance, and the diameter of the ball valve is also small, the ball is put into the valve body from one side, the seat should be screwed in, and then press the ball. Some non-standard one-piece ball valves have short structures, so the best way to distinguish is the structure of the valve body.

One-piece ball valve is fixed by a plug head, convenient and practical maintenance, often used in small size valves.

Two-piece ball valve is called stainless steel ball valve, with the left and right two body bolt connection, fixed by the 2 pieces of the valve body to clamp the ball valve, and maintenance is relatively difficult, the most important is to see the middle of the screw tightness, which is directly related to whether the seal is tight. In addition, it is mainly used in atmospheric pressure and high pressure environments, such as non-standard nominal diameter below DN50 also belongs to two-piece valves.

The two-piece ball valve is fixed by the two valve bodies, the maintenance is more complex, the middle screw tightness is the key, the relationship between leakage, commonly used valves.

The three-piece ball valve is similar to the two-piece ball valve, but the three-piece can be used in ultra-high pressure environments, and the structural design of the valve will have three pieces of the valve body, which is clamped and fixed by the left and right sides with a neck flange, and the normal nominal diameter is above DN50.

The three-piece ball valve is somewhat similar to the two pieces, but a plurality of valve bodies in the middle of the ball are clamped by both sides with neck flanges. Commonly used larger and more important valves.

After reading this article, I believe you have a very good understanding of what is a stainless steel one-piece ball valve, what is a two-piece ball valve, and what is a three-piece ball valve.