plastic pall ring, pp pall ring,pph pall ring, pvc pall ring, cpvc pall ring, pall ring CHEMPACK Plastic Pall Ring, have three types. Technical dataSpec.D*H*T (mm)Number per m³Bulk density (kg/m³)Surface area (m²/m³)Free volume (%)F factor (m-1)Dg1616*16*1.111200014118891249Dg2525*25*1.25350015017590239Dg3838*38*1.41580098.011589220Dg5050*50*1.5650074.811290154Dg7676*76*2.6193070.9739294Note: The ...