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Butterfly valves have been around for a long time and are used in a variety of applications. They made their debut in the 1930's and have been used in several industries ever since. There are several different types of butterfly valves, but they fall into two basic types - lug valves and wafer valves. A butterfly valve is recognized as a "quarter-turn" valve. The valve is designed...
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Metal seal butterfly valve means that both sides of the seal pair are made of metal material or other hard materials. The sealing performance is poor, but it is resistant to high temperature, abrasion and good mechanical properties. Such as: steel + steel; steel + copper; steel + graphite; steel + alloy steel. The steel here may also be cast iron, cast steel, alloy steel or alloys for surfacing an...
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