Classification of stainless steel butterfly valves - Classification by connection method

2024-05-23

Abstract: This article mainly explains that stainless steel butterfly valves can be divided into 5 types according to the connection method, which is convenient for everyone to recognize and understand stainless steel butterfly valves with different connection methods.

A. Wafer-type stainless steel butterfly valve

Wafer-type is a connection method of butterfly valves. When installing on the pipeline, you need to clamp the butterfly valve with two flanges first, and then connect it to the flange on the pipeline.

The structure of the wafer-type butterfly valve is relatively short and small, and it occupies a small space. When installing, first fix it with a special flange for the wafer-type butterfly valve, and then put the fixed wafer-type flange in the middle of the flanges at both ends of the pipeline, and fix it with bolts through the special flange for the wafer-type butterfly valve and the pipeline flange, so as to achieve the control of the fluid medium in the pipeline. The small space occupied by the wafer-type butterfly valve makes it particularly suitable for installation and use in narrow spaces or when the distance between pipelines is relatively small.

B. Flange-type stainless steel butterfly valve

The butterfly valve flange connection is a flange with flanges at both ends of the valve body, corresponding to the flange on the pipeline, and the flange is fixed by bolts and installed in the pipeline.

C. Welded stainless steel butterfly valve

The two ends of the valve body are processed into butt welding grooves according to the requirements of butt welding, corresponding to the pipeline welding grooves, and the stainless steel butterfly valve and the pipeline are connected by welding.

D. Threaded stainless steel butterfly valve

The stainless steel butterfly valve is connected to the pipeline by threading. This connection method is suitable for low-pressure and small-diameter pipeline systems.

E. Clamp-type stainless steel butterfly valve

The clamp connection of the stainless steel butterfly valve, also known as the groove connection, is a quick assembly joint composed of a spliced clamp, a C-type rubber seal and a fastener after the joint part of the flat end of the pipe or pipe fitting is processed into a circular groove.

1. The center positions of the two ends are different

The center points of the two ends of the stainless steel eccentric reducer are not on the same axis.

The center points of the two ends of the stainless steel concentric reducer are on the same axis.

2. Different operating environments

One side of the stainless steel eccentric reducer is flat. This design facilitates exhaust or liquid drainage and facilitates maintenance. Therefore, it is generally used for horizontal liquid pipelines.

The center of the stainless steel concentric reducer is on a line, which is conducive to fluid flow and has less interference with the flow pattern of the fluid during diameter reduction. Therefore, it is generally used for diameter reduction of gas or vertical liquid pipelines.

3. Different installation methods

Stainless steel eccentric reducers are characterized by simple structure, easy manufacturing and use, and can meet a variety of pipeline connection needs. Its application scenarios mainly include:

Horizontal pipe connection: Since the center points of the two ends of the stainless steel eccentric reducer are not on the same horizontal line, it is suitable for the connection of horizontal pipes, especially when the pipe diameter needs to be changed.

Pump inlet and regulating valve installation: The top flat installation and bottom flat installation of the stainless steel eccentric reducer are suitable for the installation of the pump inlet and regulating valve respectively, which is beneficial to exhaust and discharge.

Stainless steel concentric reducers are characterized by less interference to fluid flow and are suitable for reducing the diameter of gas or vertical liquid pipelines. Its application scenarios mainly include:

Gas or vertical liquid pipeline connection: Since the center of the two ends of the stainless steel concentric reducer is on the same axis, it is suitable for the connection of gas or vertical liquid pipelines, especially where diameter reduction is required.

Ensure the stability of fluid flow: The stainless steel concentric reducer has little interference with the fluid flow pattern during the diameter reduction process and can ensure the stability of the fluid flow.

4. Selection of eccentric reducers and concentric reducers in practical applications

In actual applications, appropriate reducers should be selected according to the specific conditions and needs of pipeline connections. If you need to connect horizontal pipes and change the pipe diameter, choose stainless steel eccentric reducers; if you need to connect gas or vertical liquid pipes and change the diameter, choose stainless steel concentric reducers.