Butterfly check valve structure and characteristics

The structure of butterfly check valve is very simple, and its structural length is also very short compared to other check valves. Butterfly check valve is also called butterfly check valve. The connection method is wafer type. The valve plate is two semicircular butterfly plates. The two butterfly plates are connected by the valve stem and are forced to reset by spring. The working principle of the butterfly check valve is: when the medium flows through the valve body channel, the medium pressure is greater than the force of the spring, and the two discs are pushed open, the valve is opened, and the medium flows; when the medium stops flowing, the two discs Then due to the force of the spring, the valve is forced to reset, and the valve is closed, and the backflow of the medium is prevented at the same time.

Butterfly check valve is also known as double-clip check valve. Its sealing surface can be surfacing wear-resistant material or lined with rubber. It has a wide range of use and reliable sealing. Butterfly check valve is an automatic valve, no manual operation is required. This type of valve is usually used in pure pipelines, as well as pipelines in the fields of industry, environmental protection, water treatment, and high-rise building water supply and drainage, to prevent the backflow of the medium. To prevent the reverse flow of the medium.
Structural features of butterfly check valve:

Compared with other types of check valves, the structural length of the butterfly check valve is only about a quarter of that of the flange check valve under the same caliber, which is more suitable for limited space. used in the pipeline.
Compared with other check valves, it is smaller in size and lighter in weight, and it is more convenient to install, disassemble and maintain in the pipeline.
The closing speed of the two valve plates is fast, and the water hammer pressure is small; the stroke of opening and closing is short, and the impact force on the valve plate is small.
It can be installed on horizontal pipes as well as in vertical pipes.
Generally, the flow channel has small fluid resistance, sensitive opening and closing of the valve plate, and good sealing performance.
Butterfly check valve is simple and compact in structure, beautiful in appearance, and uses a special process for casting and painting, which has a longer life and better stability.

Pre: There are several materials for turbine butterfly valve

Next: What are the valves commonly used in irrigation