Butterfly valves are suitable for pipelines transporting various corrosive and non-corrosive fluid media in engineering systems such as generators, coal gas, natural gas, cold and hot air, chemical smelting and power generation and environmental protection, and are used for regulation and interception with the flow of the medium.
Butterfly valves are suitable for flow regulation. Since the pressure loss of the butterfly valve in the pipeline is relatively large, it is about three times that of the gate valve. Therefore, when selecting the butterfly valve, the influence of the pressure loss of the pipeline system should be fully considered, and the strength of the butterfly plate to withstand the pressure of the pipeline medium should also be considered when it is closed. In addition, it is necessary to consider the limitation of the working temperature that the elastic valve seat material can withstand at high temperatures.
The structural length and overall height of the butterfly valve are small, the opening and closing speed is fast, and it has good fluid control characteristics. The structural principle of the butterfly valve is most suitable for making large-diameter valves. When the butterfly valve is required to control flow, the most important thing is to correctly select the size and type of the butterfly valve to make it work properly and effectively.
Generally, in throttling, regulating control and mud medium, the structure length is required to be short and the opening and closing speed be fast. For low pressure cut-off, butterfly valve is recommended.
In the case of two-position adjustment, narrowed passage, low noise, cavitation and vaporization, a small amount of leakage to the atmosphere, and abrasive media, butterfly valves can be used.
When using butterfly valve under special conditions such as throttling adjustment, strict sealing or severe wear, low temperature and other operating conditions, a special design for triple eccentric or double eccentric with a specially designed metal seal with adjusting device is required.
The center line butterfly valve is suitable for fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, oil and various situations, e.g. zero gas test leakage, high life requirements, and working temperature of -10~150℃, Acid-base and other pipelines that require complete sealing.
The soft-sealed eccentric butterfly valve is suitable for the two-way opening and closing and adjustment of ventilation and dust removal pipelines. It is widely used in gas pipelines and waterways in metallurgy, light industry, electric power, and petrochemical systems.
The metal-to-metal seal double eccentric butterfly valve is suitable for urban heating, steam, water and gas, oil, acid and alkali pipelines, as a regulating and intercepting device.
In addition to being used as a large-scale pressure swing adsorption (PSA) gas separation device program control valve, the metal-to-metal seal triple eccentric butterfly valve can also be widely used in petroleum, petrochemical, chemical, metallurgical, electric power and other fields. It is a good alternative for gate valve, stop valve, etc.
Post time: Jul-12-2021