... , PP, RPP, PVC, CPVC, PVDF, PTFE, HDPE Size: 5/8", 1", 1.5", 2", 3" Use as tower packing Plastic pall ring ... (m2/m3)Void volume(m3/m3)Dry packing factor ( m-1 )Heaping number (n/m3)Heaping weight (kg/m3)5/8 ... ×16×11880.912751120001411 "25×25×1.21750.9023953500911.5 "38×38×1.41150.8922015800712 "50×50×1.5930.901276500563 "76×76×2.6730 ...