1. Stainless steel one-piece ball valve
First of all a piece of ball valve is a manual valve, structural design is integral, are stabilized by a plug head of the ball, so as to be convenient in the maintenance, and the caliber of the ball valve is also smaller, the ball from the side of the valve body into the valve seat to be screwed in, and then press the ball. Some non-standard one-piece ball valves have a short structure, so the best way to distinguish is the structure of the valve body. One-piece ball valves are fixed by a plug to hold the ball in place, which is easy and practical to maintain, and commonly used for small-sized valves.
2. Stainless steel two-piece ball valves
Two-piece ball valve is called stainless steel ball valve, to the left and right two pieces of the valve body bolted to the composition of the fixed by the 2 pieces of the valve body to clamp the ball valve, and maintenance is relatively difficult, the most critical is to see how the middle of the screws tightness, which is directly related to is the seal is tight. In addition, it is mainly used for atmospheric pressure and high pressure environment, like non-standard class nominal diameter in DN50 below also belongs to the two-piece valve. Two-piece ball valve is a two-piece valve body clamped ball fixed, maintenance is more complex, the middle screw tightness is very critical, the relationship between whether the leakage, commonly used valves.
3. Stainless steel three-piece ball valve
Three-piece ball valves and two-piece ball valves are similar, but three-piece can be used for ultra-high pressure environment, and the structural design of the valve will have three pieces of the valve body, by the left and right sides of the neck flange to clamp the fixed, the normal nominal diameter in DN50 or more. Three-piece ball valve is a little similar to the two pieces, but the ball in the middle of more than one valve body, by both sides of the neck flange clamped. Commonly used larger and more important valves