3-Piece Ball Valves VS 2-Piece Ball Valves

Ball valve is currently the most widely used valve, it can be made into different types to be suitable for different industries. For example, it can be made of stainless steel, plastic, brass and so on.

In this article, we will introduce you to the difference between a three-piece ball valve and a two-piece ball valve, hoping to help you understand and choose a better valve.

What is a three-piece ball valve?

The three-piece ball valve is composed of a pair of connecting ends and the main body, which are combined by these three parts. The end cap can be threaded, welded, flanged, or clamped to connect to the pipeline. It can be made of stainless steel or carbon steel.

The a dvantage of the three-piece ball valve is that it is easy to disassemble. So that the central body can be maintained and cleaned without affecting the entire pipeline. For example, when the valve body is blocked, we only need to untie the bolts of the ball valve, take out the actuator and the center body, and then clean and maintain it. After cleaning, we can put the center body and the end cap together with bolts. We do not need to disassemble the entire valve from the pipeline, which greatly reduces our maintenance costs.

Secondly, most of the three-piece ball valves are full-bore designs, which can allow more flow to transport. Widely used in water treatment, wastewater treatment, seawater treatment, and so on.

What is a two-piece ball valve?

The two-piece ball valve is composed of two parts, which are assembled by bolts. They can be threaded connections, flanged connections or welded connections to meet different pipeline requirements.

The two-piece ball valve is tight and reliable. It has a good sealing performance, which reduces the possibility of leakage. If the valve is blocked, the entire valve needs to be removed from the pipeline for cleaning. This might make the repair cost increase. Suitable for flow rate control of water, steam, air, and so on.

covna threaded ball valve

In fact, there is little difference between the two-piece ball valve and the three-piece ball valve, both of which are used for start, on-off, and flow adjustment. But compared with the two designs, the three-piece ball valve is more able to withstand high-pressure applications and is more convenient for maintenance.

COVNA two-piece ball valve and three-piece ball valve can be driven manually, electrically or pneumatically, which perfectly meets the needs of your different industries. If you need more information about COVNA valves, please feel free to contact us at sales@covnaactuator.com