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Introduction of butterfly valve function

Posted by Bundor valve
Butterfly valve also known as the flap valve, is a simple structure of the control valve, can be used in the low-pressure pipeline medium switch control of the butterfly valve is refers to the closing parts (disc or disc) for the disc, around the valve axis to achieve the opening and closing of a valve.
 butterfly valve
Butterfly valves can be used to control the flow of air, water, steam, all kinds of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid.It is mainly used for cutting and throttling in the pipeline.Butterfly valve is a disc - shaped disc, in the body around its own axis to achieve the purpose of opening and closing or adjustment.
Butterfly valve is usually used in the industrial production pipeline, as the control part of the pipeline, the butterfly valve is very big, it can cut off the flow of intermediate pipeline, or adjust the size of the flow of medium in the pipeline.At present, butterfly valve has been widely used in water conservancy engineering, water treatment, petroleum, chemical, urban heating and other general industrial production pipelines, as well as the thermal power plant condenser and cooling water system.
According to the butterfly valve structure, the butterfly valve can be divided into Central Line butterfly valve, single eccentric butterfly valve, double eccentric butterfly valve, three eccentric butterfly valve.Different butterfly valves, the role of the pipeline is not the same.
Center line butterfly valve is usually a soft-seal butterfly valve, this type of butterfly valve has very good sealing performance, suitable for the management requirements of complete sealing, leakage is zero in the pipeline.But because of the limitations of the soft seal seat, the center line butterfly valve is not resistant to high temperature, rubber soft seal butterfly valve operating temperature in 0~80℃, fluorine lined soft seal butterfly valve operating temperature between -10~150℃.
Double eccentric butterfly valve is suitable for use in urban heating, gas supply, water supply and other engineering pipelines as a regulating and throttling device, the applicable medium includes oil, acid and alkaline substances.Double eccentric butterfly valve sealing performance is poor, is used in the pipeline to allow a certain amount of leakage in the place of installation.
Double eccentric butterfly valve and three eccentric butterfly run for large diameter valves.Double eccentric butterfly valve is suitable for the opening and closing of the ventilation and dust removal pipeline and its adjustment. It is widely used in the ventilation and dust removal pipeline of the gold industry, light industry, power industry and petrochemical industry.
Three eccentric butterfly valve is a hard seal butterfly valve, its advantages are high temperature and high pressure, and wear.It is more widely used in the field, it not only inherited the advantages of metal hard seal butterfly valve high temperature and high pressure, and at the same time, it also has the excellent sealing performance of soft seal butterfly valve, gate valve, globe valve, ball valve good alternative products.