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back-seated butterfly valve manufacturers take you to understand the advantages and disadvantages of butterfly valves and installation and maintenance

time：

2021-09-15

The back-seated butterfly valve manufacturer tells you that the butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve opening and closing or adjustment. The back-seated butterfly valve manufacturer tells you that the butterfly valve is usually less than 90 degrees from fully open to fully closed, and the butterfly stem itself has no self-locking ability. For the positioning of the butterfly plate, a worm gear reducer should be installed on the valve stem. The use of worm gear reducer can not only make the butterfly plate have self-locking ability and stop at any position, but also improve the operation performance of the valve.

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The characteristics of the industrial butterfly valve are high temperature resistance, high applicable pressure range, large nominal diameter of the valve, carbon steel for the valve body, and metal ring instead of rubber ring for the sealing ring of the valve plate. The back-seated butterfly valve manufacturer tells you that large-scale high-temperature butterfly valves are made of steel plate welding, which are mainly used for flue air ducts and gas pipes of high-temperature media.
advantage:
1. The opening and closing is convenient and quick, labor-saving, and the fluid resistance is small, which can be operated frequently.
2. Simple structure, small size and light weight.
3. The mud can be transported, and there is less liquid accumulated at the pipe mouth.
4. Under low pressure, good sealing can be achieved.
5. The back-seated butterfly valve manufacturer tells you that its adjustment performance is good.
shortcoming:
1. The operating pressure and working temperature range are small.
2. Poor sealing.
Installation and maintenance:
1. During installation, the valve disc should stop in the closed position.
2. The opening position should be determined according to the rotation angle of the butterfly plate.
3. For butterfly valves with bypass valves, the bypass valve should be opened before opening.
4. The back-seated butterfly valve manufacturer tells you that it should be installed according to the manufacturer's installation instructions. For butterfly valves with heavy weight, a firm foundation should be set up.