Some Knowledge of Butterfly Valve and Butterfly Handles
Composed of a few components, butterfly handles have simple structure, small size and light weight. Also, by simple 90° rotation, butterfly valves can be quickly opened and closed with easy operation. What’s more, they have a good feature of fluid control. In fully open situation, the thickness of the disc is the only resistance when the media flows through the valve body, therefore there will have small pressure.
Compared with elastic sealing valves, metal sealing valves have longer service life, but it is still difficult to seal completely. Instead of being subject to temperature limitation, metal sealing valves can work in high temperature situation. If you want to choose a butterfly valve with good flow control characteristic, right size and type will be the key points. Considering the structure principle of butterfly valves, they are suitable for the production of large diameter valves. Not only widely used in oil, gas, chemicals, water treatment and other general industries, but also they are applied in cooling water system of thermal power station.
Common butterfly valves can be divided into wafer butterfly valves and flange butterfly valves. The first one uses studs to connect the valve between the two pipeline flanges while the second one uses bolts to connect the flanges on both ends of the valve to pipe flanges.
Butterfly valves are the first choice for sulfuric acid appliance, and they are used in burning sulfur, transforming, drying and absorbing section in the system of sulfuric acid. The majority of users believe that butterfly valves have these following advantages: good sealing performance, light weight, corrosion and high temperature resistance, easy operation, flexibility and safe use. Therefore, they have got a great range of application. What’s more, it is widely used as regulation and shut-off device on pipelines of SO2, steam, air, gas, ammonia, CO2 gas, oil, water, salt, lye, water, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media in chemical, petrochemical, metallurgy, medicine, food and other industries.