Plastic pall ring for filtering waste gas: 1.material:PE,PP, ... gravity, high mass transfer efficiency and so on, and the application temperature in media ranges from 60°Cto 150° ... C. For these reasons it is widely used in the packing towers in petroleum industry, chemical industry, alkali-Chloride ... *76*2.6739219305876*76*2.673 plastic pall ring packing used in the packing towers in petroleum industry