Results are presented of total reflux experiments carried out at Fractionation Research Inc. with Montz-Pak A3-500M, an advanced corrugated sheet wire gauze packing, using Paraxylene/Orthoxylene system at 0.1 bara and for the first time at 0.02 bara. In both cases an expectedly good performance was achieved, ranging from eight stages at low- to five stages per meter bed height at upper limit of the operating vapour load. Interestingly, within preloading region the packing exhibited a better efficiency at 0.02 bara, however this was at the expense of somewhat increased pressure drop, and, strikingly, no gain on capacity side. Delft model proved capable of capturing observed trends, but exhibits a pronounced discrepancy with respect to measured efficiency and pressure drop at 0.02 bara, and suggests a higher flooding limit than observed. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.