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Working principle and usage of Butterfly valve

Writer:Fanny KangSource:Network Date:2017-5-13 17:37
butterfly valve working principle
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Butterfly valve is a commonly used valve instrument, mainly by the valve body, stem, butterfly plate and seal composition, mainly in the pipeline from the cut and throttling effect. 
 
Working principle of butterfly valve 
Butterfly plate driven by the stem, if turned 90 °, will be able to complete an opening and closing. Change the deflection angle of the butterfly plate, you can control the flow of the media.
 
Working conditions and media: butterfly valve for the furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection, building drainage and other engineering systems to transport a variety of corrosive, non-corrosive fluid Medium pipe, used to adjust and cut off the flow of media.
 
Usage of butterfly valve
Butterfly valve refers to the closure (disc or butterfly plate) for the disc, around the valve shaft rotation to achieve the opening and closing of a valve in the pipeline from the main cut and throttling effect. Butterfly valve opening and closing parts is a disc-shaped disc, in the valve body around its own axis of rotation, to achieve the purpose of opening or closing or adjustment. Fully open or fully closed butterfly valve is usually less than 90 °, butterfly valve and valve stem itself does not have self-locking ability, in order to position the plate, to install the worm on the stem reducer. The use of worm reducer, not only can make the disc with self-locking ability, so that the butterfly plate to stop at any position, but also improve the valve operating performance.
 
 Industrial butterfly valve has some characters such as high range of temperature and pressure,large nominal diameter.he valve body made of carbon steel, valve plate sealing ring with metal ring instead of rubber ring. Large-scale high-temperature butterfly valve made of steel welding, mainly used for high-temperature media, smoke duct and gas pipeline.

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