Plastic Cascade Ring is a kind of advanced packing which is made of heat resistant and chemical corrosion resistant plastics, such as PE, PP, RPP, PVC, CPVC and PVDF.Low aspect ratio increases capacity and reduces pressure drop. The preferred vertical orientation of the packing axes allows free gas flow through the packed bed. 
Low pressure drop and high capacity allows smaller column diameter and blower sizes in new installations.
Open structure and preferred vertical axis orientation inhibits fouling by allowing solids to be more easily flushed through the bed by the liquid. 
Ring and spoke construction and preferred vertical orientation provide high mechanical strength, which allows use in deep beds. 
Plastic cascade ring packing is made from heat resistant and chemical corrosion resistant plastics, including polyethylene (PE), polypropylene (PP), reinforced polypropylene (RPP), polyvinyl chloride (PVC), chloridized polyvinyl chloride (CPVC) and polyvinylidene fluoride (PVDF).
 
It has features such as high free volume, low pressure drop, low mass-transfer unit height, high flooding point, uniform gas-liquid contact, small specific gravity, high mass transfer efficiency and so on, and the application temperature in media ranges from 60to 150. For these reasons it is widely used in the packing towers in petroleum industry, chemical industry, alkali-Chloride industry, coal gas industry and environmental protection, etc.