News - Characteristics and Applications of Butterfly Valve

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Home > News > Characteristics and Applications of Butterfly Valve

Characteristics and Applications of Butterfly Valve - 2013-06-21 15:10:33

A butterfly valve is a control valve with a simple structure. It opens, closes and adjusts fluid passageways through using disc-type headstock pieces to reciprocate and rotate about 90 degree. It is one of valves which have fastest development in recent years. It has a wide application scope. Passageways used to transfer variety kinds of flowing medium in engineering system such as natural gas, liquefied petroleum gas, city gas and heat and cold air all can apply it.

Butterfly valves have simple and rapid operation, small volume, light weight and low material consumption. Moreover, they possess a closing seal and excellent flow adjusting function. There are variety types of butterfly valves with complete specifications on the market. These butterfly valves have many classification methods. The following has listed several common classifications of butterfly valve.

According to the structure, the Soft Seated Butterfly Valve has four types which are center line-type butterfly valve, single-eccentric center butterfly valve, double-eccentric center butterfly valve and tri-eccentric center butterfly valve. Firstly, the center line-type butterfly valve is a part used to realize on-off pipeline system and flow control. The gyration center of its valve plate is on the centerline extraction of valve body and passes through the center of sealing surface. It has a wide application in petroleum, chemistry, metallurgy and other fields. The eccentric butterfly is a butterfly valve whose valve shaft center not only deviates from the center of butterfly plate, but also deviates from the center of its ontology and its sealing pair is oblique cone. Among these eccentric butterfly valves, the double-eccentric butterfly valve applies to drainage system. Especially, it can be used as a conditioning and closure device in the passageway of water way. Compared with the center line-type butterfly valve, it has longer longevity, better stability and high pressure resistance.

In addition, in terms of materials used for seal surface, the High Performance Butterfly Valve can also be divided into soft seated butterfly valve and metal seated butterfly valve. The soft seated butterfly valve is mainly used in the water supplying and draining system of food, medicine, chemistry petroleum and other industries. It also can play a function of adjusting flow and truncating fluid in the gas pipeline. It has simple operation and convenient installation. The sealing materials applied by it are aging resistant, corrosion resistant and has long service life. Similarly, the metal seated butterfly valve also has characteristics of corrosion resistance and long longevity. As its sealing ring is made of stainless steel, it still can keep excellent sealing whether in high temperature or low temperature. It also has a wide application in petroleum, chemistry, metallurgy and other fields.

With the development of technology, all types of butterfly valves are developing towards high temperature, high pressure, large aperture, high tightness, long service life, excellent adjusting characteristics and multifunction. Because of this, their application in pipelines will gradually become wider and wider, and they will get more and more attention from the butterfly valve manufacturer.

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