Cascade Ring has been used successfully as an inexpensive and efficient means to increase tower capacity and efficiency There are numerous process advantages that can be realized by using plastic random column packing in many applications. It is made of anti-chemical corrosion materials, such as PE, PP, RPP, PVC, CPVC and PVDF The feature is that high void ratio, low pressure drop, sufficient gas liquid contact, small specific weight, and high mass transferring efficiency and so on. The working temperature is within 60-150℃, and widely used in refinery, chemical alkali-chloride, coal gas and environmental protection etc.