... , CPVC pall ring, PVDF pall ring, PTFE pall ring, HDPE pall ring.Plastic Pall Ring has an advance on the ... of the packing, in terms of throughput, efficiency and pressure drop.Advantages of Plastic Pall Ring:1. High void ratio.2 ... . Low pressure drop.3. Small specific gravity.4. Resist chemical corrosion.5. ... ring (Material: PE, PP, RPP, PVC, CPVC, PVDF, PTFE, HDPE)