Pall rings  are made out of metal or plastic or ceramic and have same general form as Raschig rings with height euqal to diameter, however portions of the original cylinder wall are cut with the projections bent inward leaving holes in the wall.

Pall ring The pall ring underwent further modification by Mass Transfer limited whereupon Cascade Mini ring was born. It has features similar to Pall ring except its height is only one-third the outside diameter. This Shape is said to Orient itself preferentially when dumped. These traditional Pall ring type packings are mostly made for kind-to-kind replacement. They are available in metal, plastic and ceramic. Raschig rings are also available in metallic, ceramic and carbon material. Both are available in various sizes such as (mm) 16, 25, 38, 50 etc. Material: SS304, carbon steel, SS316, SS304L, PP, PVC,CPVC, PVDF and Ceramic. SS304 Pall ring, SS316 Pall ring, PVC pall ring, CPVC Pall ring, PVDF pall ring, PTFE pall ring, Ceramic pall ring IMPROVED PALL RING, SUPER PALL RING, HY PAK Metal pall ring:     ITEM Piece Density pcs/m3 Surface Area m2/m3 Voidage (%) dry filling gene F m-1 Metal Pall Ring 16mm 214000 344.2 93.1 275 Metal Pall Ring 25mm 51000 206.7 94.8 239 Metal Pall Ring 38mm 14300 130.4 96.08 220 Metal Pall Ring 50mm 6500 102.1 95.9 127 Metal Pall Ring 76mm 1930 73.2 95.2 94   Plastic Pall ring:     ITEM Piece Density pcs/m3 Surface Area m2/m3 Voidage (%) Packing Factor Plastic Pall Ring 16mm 171000 344.2 93.1 275 Plastic Pall Ring 25mm 42900 206.7 94.8 239 Plastic Pall Ring 38mm 13700 130.4 96.08 220 Plastic Pall Ring 50mm 6500 102.1 95.9 127 Plastic Pall Ring 76mm 1765 73.2 70.9 94

Developed in the 1930s the berl Saddles has significantly increased surface area per unit of packed volume compared to the rashing ring. This Design was further improved by Norton Chemical process Products. The custome is: Intalox Saddle and Super intalox saddle.

Ningbo T.C.I co., combined the advantages of the shap of the intalox saddle with that of a modern ring packing whereupon IMTP (Intalox metal tower packing) come into being into the late 1970.
 

Packing type	Void fraction	Bulk density	Dry bed Drop
	M2//3	Kg/m3	G’=7324(kg/h.m2)	G’=13182(kg/h.m2)
25mm Pall ring	0.942	464	375	1216
38mm Pall ring	0.956	352	261	841
50mm Pall ring	0.965	280	180	588
#25 IMTP	0.962	301	310	1012
#38 IMTP	0.971	232	196	645
#50 IMTP	0.977	181	122	408