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Structured packings are neatly stacked inside the columns as per uniform geometry. They are characterized by large specific surface area, low pressure drop, uniform fluid distribution and high efficiency of mass & heat transfer. Their main application fields are in distillation, desorption, absorption, heat exchanges, stripping and extraction.

SUTONG structured packings are characterized by the Patent of ZWF Technology.ZWF means "Zero Wall Flow".Wall flow of the normal structured packing is above 30% at least, and mostly above 40%. The loss ratio of the packing separation efficiency is 15%-24%. ZWF structured packing can overcome the loss of the separation efficiency caused by wall flow. It can keep the wall flow below 2%.