Butterfly valves, known for quick cut-off and continuous adjustment, find their primary application in low-pressure, large-diameter pipelines for both liquid and gas. Ideal for scenarios with minimal pressure loss tolerance, a need for flow adjustment, and rapid opening and closing requirements, these valves are commonly used in situations with temperatures below 300°C and pressures below 40 kg. While butterfly valves in domestic settings rarely exceed CL600, they can handle water, gas, and even granular media.
The evolution of butterfly valves, especially sealed variants with synthetic rubber, led to significant growth. Initially used mainly for low-pressure applications in China until the 1980s, the introduction of hard-seal (metal-seal) butterfly valves gained momentum in the 1990s. Today, many valve manufacturers can consistently produce medium-pressure metal-sealed butterfly valves, expanding their applications.
Butterfly valves are versatile in transporting and controlling various media, including water, sewage, air, gas, liquid natural gas, and more. Despite their higher pressure loss compared to gate valves, butterfly valves offer advantages like compact size, fast opening and closing, and effective fluid control, making them suitable for large-diameter valves.
When selecting a butterfly valve, factors such as pressure loss, butterfly plate strength, and working temperature of the elastic valve seat material at high temperatures must be considered. The valve is particularly recommended for low-pressure cut-off, two-position adjustment, narrow passage, low noise, and situations involving cavitation or vaporization.
Special conditions, such as strict sealing, severe wear, low temperature (cryogenic), and throttling adjustment, demand specially designed butterfly valves. butterfly valves, for instance, are suitable for a range of applications, including fresh water, sewage, steam, and various chemical pipelines, with a working temperature range of -10°C to 150°C.
Different variants cater to specific needs, such as soft-sealed eccentric butterfly valves for ventilation and dust removal pipelines and metal-to-metal wire sealing double eccentric butterfly valves for urban heating, gas, and water supply pipelines.
The metal-to-metal seal triple eccentric butterfly valve, aside from its use in gas separation devices, serves as a replacement for gate valves and stop valves in industries like petroleum, petrochemicals, chemical processing, metallurgy, and electric power. Its adaptability makes it a valuable component in various critical applications.
