Floating ball valve: the preferred solution for medium and low pressure and small diameter pipeline systems

In pipeline systems, ball valves, as a widely used fluid control device, play an important role in various industries with their unique structure and superior performance. Among them, floating ball valves have become the preferred solution for medium and low pressure and small diameter pipeline systems due to their simple structure and low cost. This article will deeply explore the working principle, structural characteristics, applicable scenarios, selection and maintenance of floating ball valves, and provide readers with comprehensive understanding and guidance.

1. Working principle and structural characteristics of floating ball valves
The working principle of floating ball valves is relatively simple. When the valve is opened, the ball floats up under the action of the medium pressure, separates from the valve seat, and forms a passage; when the valve is closed, the ball rotates 90 degrees under the action of the valve stem, fits tightly with the valve seat, and achieves sealing. Because the ball floats under the action of the medium pressure, it is named "floating ball valve".

The structure of the floating ball valve is relatively simple, mainly composed of valve body, ball, valve seat, valve stem, handle (or drive device) and other components. Among them, the valve body and ball are usually made of cast steel, stainless steel and other materials, with high strength and corrosion resistance. The valve seat is made of soft materials (such as rubber, polytetrafluoroethylene, etc.) or hard alloy to ensure good sealing performance.

2. Applicable scenarios of floating ball valves
Floating ball valves are widely used in medium and low pressure and small diameter pipeline systems due to their simple structure and low cost. These systems usually include water supply and drainage systems, air conditioning systems, fire protection systems, and low-pressure fluid control systems in some industrial processes. In these scenarios, floating ball valves can meet basic switch control and sealing requirements while maintaining low maintenance costs and long service life.

In addition, floating ball valves are also suitable for some occasions where fluid resistance is not required. Since the ball is separated from the valve seat when it is opened, forming a larger diameter, the flow resistance is small, which is suitable for pipeline systems that require large flow to pass through. However, it should be noted that in high pressure, high temperature or corrosive media, the sealing performance and stability of floating ball valves may be affected, so they need to be selected with caution.

3. Selection and maintenance of floating ball valves
In terms of selection, users need to choose the appropriate floating ball valve model and specifications based on the working pressure, temperature, medium characteristics and installation space of the pipeline system. At the same time, it is also necessary to consider details such as the valve material, sealing form, and drive method to ensure that the valve can meet the actual needs of the system.

In terms of maintenance, floating ball valves need to regularly check the sealing performance of the valve, the wear of the ball and the valve seat, and the flexibility of the valve stem and handle. For any problems found, timely measures should be taken to repair or replace them to ensure the normal operation and long-term stability of the valve. In addition, users also need to pay attention to keeping the valve clean and dry to avoid damage to the valve by impurities and moisture in the medium.