Step Ring learned the advantages of short Raschig ring and ring for the improvement Powell, ring height to diameter ratio of 1:2 and taper rolled edge is added to one end, to reduce the gas- 
 Over the bed resistance, and increased throughput, high-strength filler, due to its structural characteristics, so that gas and liquid distribution, increasing the gas-liquid contact area and improve the mass transfer efficiency 
 Rate. 
 Application: ammonia desulfurization, decarburization system, separation of crude oil distillation unit of separation, for example: methanol separation, separation of organic acid absorption and desorption tower. 

 Specification 
 OD × H × D 
 mm 
 Surface area 
 m2/m3 
 Void 
 % 
 Number of accumulation 
 n/m3 
 Weight accumulation 
 Kg/m3 
 Dry packing factor 
 m-1 

 Φ16 16 × 8.9 × 1.1 370 85 2991 36 135.6 602.6 
 Φ25 25 × 12.5 × 1.2 228 228 8150 0 97.8 312.8 
 Φ38 38 × 19 × 1.4 132.5 132.5 27200 57.5 175.8 
 Φ50 50 × 25 × 1.5 114.2 114.2 10740 54.8 143.1 
 Φ76 76 × 38 × 2.6 90 90 3420 54.5 112.3 
 Φ100 100 × 50 × 2.5 78 93.2 1650 55 98.5