British Troy Brooks ring 
 Application: crude oil vacuum distillation, vacuum distillation, alkene separation, extraction and distillation. 
 Material: stainless steel, 304L / 306L, carbon steel, aluminized steel, aluminum and other alloys, polypropylene, can also be requested by the user. 
 Features: pressure drop, flux, high efficiency (even at low liquid flow rate), high elasticity ratio, filler layer of fluid re-distribution performance. 
 Filler size surface area porosity model number of dry packing factor accumulation 
 # 50 50 × 0.8 89.58 97.1 12133 94.6 
 # 40 40 × 0.6 143.5 97.2 35800 86 
 # 25 25 × 0.5 170.55 96.0 84620 58