throttling butterfly valve

基本解釋

A gate valve and a rotary butterfly valve are shown acting as the upstream throttling valve.
圖中顯示一閘閥及一旋轉(zhuǎn)的蝶閥用作上游節(jié)流閥。
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Fisher 8560 Fisher 8560 is a high-performance butterfly valve with a splined shaft for throttling control.
8560是一款高性能蝶閥，可用于絕大多數(shù)工況。
Butterfly valve is closed parts ( valve flap or disc for disc ), around the valve axis of rotation to achieve the open and close a valve, in the pipeline mainly as shut off and throttling effect.
蝶閥是指關(guān)閉件（閥瓣或蝶板）為圓盤，圍繞閥軸旋轉(zhuǎn)來(lái)達(dá)到開啟與關(guān)閉的一種閥，在管道上主要起切斷和節(jié)流作用。