... ring Size: 16, 25, 38, 50,76mm Material: PE, PP, RPP, PVC, CPVC, PVDF, PTFE, HDPE Use as tower packing Plastic pall ring ... :PE pall ring, PP pall ring, RPP pall ring, PVC pall ring, CPVC pall ring, PVDF pall ring, PTFE pall ring, HDPE pall ring.Plastic pall ring's ... only has half of pressure drop compared with Rasching Ring. Plastic pall ring has some advantages such as lower pressure drop, big ...