PE,PP,RPP,PVC,CPVC,PVDF Size:16,25,38,50,76mm Professional experience in production & export ISO9001-2008 certified Plastic Pall Ring ... 150. For these reasons it is widely used in the packing towers in petroleum industry, chemical industry, alkali-Chloride industry, ... (m²/m³)Free volume (%)F factor (m-1)Dg1616*16*1.111200014118891249Dg2525*25*1.25350015017590239Dg3838*38*1.41580098.011589220Dg5050*50 ...