Internally threaded threaded ball valves are mainly divided into one-piece ball valves, two-piece ball valves and three-piece ball valves according to their structures. 

Understanding their characteristics and differences will help us choose the appropriate ball valve to use.

First, let’s understand from the definition what a one-piece ball valve, a two-piece ball valve and a three-piece ball valve are.

One-piece ball valve refers to a ball valve that is connected by a small-diameter internal thread and consists of an integral one-piece valve body.

 The integral valve body is often used in small-sized valves.

Two-piece ball valve, also called two-piece ball valve, refers to a commonly used valve with small diameter internal thread connection, 

the valve body is divided into two parts, and the buckle form is used.

Three-piece ball valves are connected with internal threads. 

The valve body consists of three parts. They are usually used for larger and more important valves.