P-Ring apply in the separation and absorption process, device of reducing pressure, the system of deviating sulfur, Isolation. High Quality Ceramic Pall Ring/Alumina Random Packing:It is a open-hole Ring, which its height and its diameter is same, and with 3 ligules toward inside at every floor. Usually, the open surface is 30% of th whole wall surface, this character helps the liquid & gas in ...