The metal rectangular saddle ring packing is developed by Norton company in America. The shape of metal rectangular saddle ring packing is between ring and saddle, so it has the advantages of both. The structure of the metal saddle ring filler in the saddle shape on the basis of the increase of ring reinforcement, to avoid overlapping, ensure a certain strength and rigidity, out of a few small claw, increase the gas-liquid agitation, strengthen the mass transfer, so as to produce a unique performance.

Metal saddle ring packing is referred to as Interlock packing in China, which enjoys a high reputation in China. This new type of packing is used to equip the new packed column, which is 35% higher than the plate column, 30% less in diameter, or 10-30% in lift rate, and 20-60% less in pressure loss. Domestic dry distillation instead of wet distillation experimental study shows that it can reduce investment 20%. In conclusion, the new ring torque saddle can increase the yield, reduce energy consumption or cost, and improve the separation efficiency.