孔板流量計用途NV2118K型標準環室孔板、法蘭孔板節流裝置是差壓式的流量測量裝置，它與差壓變送器配套使用。在冶金、化工、石油、電力工業系統連續測量介質溫度≤400℃的液體、氣體、蒸汽流經孔板所產生的壓差，由變送器將該壓差信號轉換成比例的輸出信號，再有二次儀表或計算機，對被測量流量進行記錄，指示或調節。二、作用原理和結構1、 基本原理在管道內部裝上孔板節流件，由于節流件的孔徑小于管
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