English
Advantages and disadvantages of butterfly valves
Created on 2024.08.05
Butterfly valves can be divided into pneumatic butterfly valves, electric butterfly valves, manual butterfly valves, etc. A butterfly valve is a type of valve that uses a circular butterfly plate as an opening and closing part, which rotates with the valve stem to open, close, and regulate the fluid channel. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. Within the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around an axis. The rotation angle is between 0° and 90°. When it rotates to 90°, the valve is fully open. Butterfly valves, also known as flap valves, are simple regulating valves that can also be used for on/off control of low-pressure pipeline media. A butterfly valve (English: butterfly valve) refers to a type of valve with a shut-off part (disc or butterfly plate) that rotates around the valve shaft to achieve opening and closing, primarily used for cutting off and throttling in pipelines. The opening and closing part of a butterfly valve is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve opening, closing, or adjustment. Butterfly valves typically move from fully open to fully closed in less than 90°, and the butterfly valve and the butterfly rod itself do not have self-locking capabilities. Therefore, to position the butterfly plate, a worm gear reducer should be installed on the valve stem. The use of a worm gear reducer not only allows the butterfly plate to self-lock, holding it in any position, but also improves the valve's operational performance. Industrial butterfly valves are characterized by their ability to withstand high temperatures, a wide applicable pressure range, and large nominal diameters. The valve body is made of carbon steel, and the sealing ring of the valve plate is a metal ring instead of a rubber ring. Large high-temperature butterfly valves are made of welded steel plates and are mainly used for flue gas ducts and gas pipelines carrying high-temperature media.
First, the advantages of butterfly valves
1. It is convenient and fast to open and close, labor-saving, and has low fluid resistance, and can be operated frequently.
2. It can transport mud and accumulate the least liquid at the mouth of the pipeline.
3. Simple structure, small size and light weight.
4. Under low pressure, good sealing can be achieved.
5. Good adjustment performance.
Second, the shortcomings of the butterfly valve
1. The range of operating pressure and working temperature is small.
2. Poor sealing.
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