... pall ring, CPVC pall ring, PVDF pall ring, PTFE pall ring, HDPE pall ring.Plastic Pall Ring has an ... the cylinder, which significantly increases the performance of the packing, in terms of throughput, efficiency and pressure drop.Advantages ... Specific surface area (m2/m3)Void volume(m3/m3)Dry packing factor ( m-1 )Heaping number (n/m3)Heaping ... ring (Material: PE, PP, RPP, PVC, CPVC, PVDF, PTFE, HDPE)