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Edwards nXDS Gas Ballast Knob
-54%✖ CURRENTLY OUT OF STOCK
Edwards nXDS Gas Ballast Knob Replace your busted or broken gas ballast knob for Edwards nXDS scroll pump with this OEM item. Fits nXDS-i and nXDS-ic Dry Scroll Vacuum Pumps. The gas ballast is a control valve that intentional introduces a small room-air leak into the second stage of the vacuum pump, producing a positive flow throughput, and sweeping out vapors from volitale compounds, such as, water and others.


