Advantages and disadvantages of butterfly valve and its structure

The opening and closing part of a butterfly valve is a disc-shaped disc that rotates in the valve body around its own axis to achieve opening and closing or adjustment.Butterfly valve fully open to fully close is usually less than 900, butterfly valve and the butterfly stem itself is not self-locking strong, in order to butterfly plate positioning, to install worm gear reducer on the valve stem.The use of worm gear reducer, not only can make the plate has self-locking ability, so that the plate stops in any position, but also can improve the operating performance of the valve.
Industrial special butterfly valve features high temperature resistance, the pressure range is also higher, the valve nominal size is large, the body is made of carbon steel, the sealing ring of the valve plate USES metal ring instead of rubber ring.Large high temperature butterfly valve is made of welded steel plate, which is mainly used for smoke duct and gas pipe of high temperature medium.

butterfly valve advantages:
1.easy to open and close, labor saving, fluid resistance is small, can often operate. 
2.Simple structure, small volume and light weight.
3.can transport mud, at least liquid accumulation at the pipe mouth. 
4.Good sealing can be achieved under low pressure.
5.Good adjustment performance.     
disadvantages of butterfly valve:
1.Small operating pressure and temperature range. 
2.Poor tightness.  
installation and maintenance of butterfly valve:
1.During installation, the disc shall stop in the closed position.
2.The opening position should be determined according to the rotation Angle of the disc.
3.with bypass valve butterfly valve, open the bypass valve before opening.
4.should be installed according to the manufacturer's installation instructions, the weight of butterfly valve, should be set up a solid foundation.