Hiflow packing can be regarded as high performance packings. The characteristic grid structure provides a high mechanical stability and at the same time a very high void fraction. Their low weight in combination with their excellent mechanical stability allows for high packed bed heights without the need for internediate support grids. Some of the inherent features of Hiflow Rings are their high loading capacity in terms of liquid and gas streams accompanied by an extremely low pressure drop. In addition, they minimise the phenomenon of liquid flow towards and down the column walls. Last but not least, they are insensitive to contamination and pollution