The one-piece ball valve is a wide-ranging ball valve, which is a ball valve composed of an integral one-piece valve body connected with a small bore internal thread. It is commonly used in some high-pressure working conditions requiring quick opening and closing or working conditions of toxic media.

The two-piece ball valve is fixed by the two-piece valve body, which is easier to disassemble than the one-piece valve. Two-piece ball valves are not suitable for high pressure.

Let's take a look at the differences between the two from the following aspects.

1. Working Principle

The working principle of one-piece ball valve is the mechanical pressure of valve stem;

The working principle of two-piece ball valve is to make the valve unblocked or blocked by rotating the valve core.

2. Structure

The one-piece ball valve is fixed by a plug;

The two-piece ball valve is fixed by clamping the ball with two pieces of valve body.

3. Closing Part

The closing part of the one-piece ball valve is a sphere, which rotates around the center line of the valve body to open and close;

There are no special requirements for two-piece ball valves.

4. Maintenance Difficulty

One-piece ball valve has simple structure and convenient maintenance;

The maintenance of the two-piece ball valve is relatively complicated, and the tightness of the bolts in the middle is critical.

5. Economic Perspective

One-piece ball valve has few main materials, the price is favorable;

The price of two-piece ball valve is higher than one-piece ball valve.