Pneumatic butterfly valves and electric butterfly valves mainly use for liquid and gas low-pressure large diameter pipelines. Butterfly valves come in many types, including quick cut-off and continuous adjustment. There is usually a temperature below 300°C and pressure below 40kg (butterfly valves usually use low pressure, like domestic ones. It is rare to achieve CL600). It is suitable for situations where the pressure loss is low, flow adjustment is requir, and opening and closing needs are fast. Water and gas are the most common mediums, and neither are demanding.
Developed after the emergence of synthetic rubber, it is a new type of shut-off valve as a sealed butterfly valve. A butterfly valve mainly use for low-pressure valves, and the valve seat makes of synthetic rubber. Currently, there are many valve factories that can produce medium-pressure metal-sealed butterfly valves with good reliability, which expands butterfly valve applications.
Butterfly valves are capable of transporting and controlling water, condensate, circulating water, sewage, seawater, air, gas, liquid natural gas, dry powders, mud, fruit pulp, and mixtures with suspended solids.
Flow regulation can accomplish with butterfly valves. The butterfly valve has a relatively large pressure loss in a pipeline, about three times greater than that of a gate valve, so when selecting the butterfly valve, it is important to take into account the pressure loss of the pipeline system, as well as the strength of the butterfly plate to withstand the pressure of the pipeline medium. Additionally, it is necessary to consider the limit of the elastic valve seat material’s working temperature at high temperatures. Despite its small size and height, the butterfly valve has good fluid control characteristics, and it opens and closes quickly. Large-diameter valves best make the butterfly valve’s structural principle.
Also, read “Understanding control valve basics”
- Throttling, regulating control, and mud mediums generally have short structures and fast opening and closing speeds (1/4 revolution). If there is a small pressure difference, a butterfly valve recommends for low-pressure cut-offs.
- When two-position adjustment, narrow passage, low noise, cavitation and vaporization phenomena, a small amount of leakage into the atmosphere, and abrasive media require, the butterfly valve can use.
- It is necessary to use a special design metal seal with a triple eccentric or double eccentric adjustment device when the butterfly valve use under special conditions, such as throttling adjustment, strict sealing requirements, severe wear, and low temperatures (cryogenic), and other operating conditions. A special butterfly valve for the ground require.
- In addition to fresh water, sewage, salt water, steam, natural gas, food, medicine, and oil pipelines, the centerline butterfly valve is also suitable for acid and alkali pipelines, seawater, salt water, steam, natural gas, food, medicine, and oil, which require complete sealing, zero gas leakage, and high life requirements.
- A soft-sealed eccentric butterfly valve is suitable for two-way openings and closings as well as adjusting ventilation and dust removal pipelines. In metallurgy, light industry, electric power, and petrochemical systems, it widely uses gas pipelines and waterways.
Aira Euro Automation is the leading butterfly valve in Nigeria. We offer various types of industrial valves like ball valves, control valves, pressure-reducing valves, plug valves, globe valves, butterfly valves, and many more.
