In general, what kind of valve is used in the selection, and the same size as the pipe diameter can be selected when selecting the type. What is the difference between the gate valve, butterfly valve and ball valve commonly used in sewage treatment?

First of all, the main basis for the selection of the valve is that the requirements of the pipeline system should be adapted to the flow characteristic curve of the valve. Generally speaking, the globe valve is mainly used for flow regulation, but its own resistance is large, and the packing is easy to leak; gate valve The resistance of the valve is small and the shut-off performance is good, but it is not conducive to the adjustment of the flow; the ball valve is suitable for the quick shut-off system, and the well shut-in is generally small; the butterfly valve is small in size, combined with the advantages of the

globe valve and the ball valve, it can be adjusted and It has better shut-off performance, larger pipe diameter, and wider application range, including hot water and cold water.

The selection of the valve is mainly based on the flow characteristic curve of the valve, the valve weight and other parameters. The ball valve is a quick opening valve, which is generally used in occasions with quick-opening and quick-closing, and the pipe diameter is relatively small. The gate valve has low resistance and good airtightness after closing. , less internal leakage, often used for shutting off the main pipe; the stop valve has large resistance and high valve weight, so it is more suitable to adjust the flow at the end; the butterfly valve is small in size, and the shape of the valve disc can be adjusted to

design different flow characteristics. The valve can be cut off, adjusted, and the diameter of the pipe can be made large. It is best to have a sample reference when choosing.