plastic pall ring, pp pall ring,pph pall ring, pvc pall ring, cpvc pall ring, pall ring CHEMPACK Plastic Pall Ring, have three types. ... ³)Free volume (%)F factor (m-1)Dg1616*16*1.111200014118891249Dg2525*25*1.25350015017590239Dg3838*38*1.41580098.011589220Dg5050 ... small specific gravity, high mass transfer efficiency and so on.Application: Absorption, scrubbing, and stripping services. Versatile ...