It was invented by German BASF, the first generation  Random packing. To compared with Raschig ring, the most important improvement is increase two row of  inward ligule. It promotes liquid-gas liquidity and improve tower’ s packing’ s mass transfer performance.  

Owing to this pack’ s shape is like saddle, so called saddle ring or Berl Ring. The earliest saddle ring’ s material is ceramic. In our actual application, when gas flows upward, liquid will flow downward along with arc channel. This Movement way will directly reduce wall flow’ s happening. However, Arched external frame also cause overlapping & bridging . Therefore, scientists change two ends into rectangle type contact surface. This improvement will reduce bridging’ happen.  

Plastic tri-pack ring is a type of random tower packing, which has hollow, spherical structure. Plastic tri- pack has a symmetrical geometry, which is made from a unique network of ribs, struts and drip rods. It is made of injection molded plastic, including PP, PE, PVC, PVDF and other materials.  

Plastic polyhedral hollow ball also called multiaspect hollow ball. It is a new type of high efficient random packing. It is made from heat resistant and chemical stable plastic material. It is composed of two hemispheres to form a whole ball shape. Each hemisphere surface has several half fan-shape leaves, the upper and lower leaves are staggered arranged. This design makes the polyhedral hollow ball lighter weight, smaller wind and flowing resistance and good hydrophilic surface.  

VSP ring also called inner arc ring. VSP rings have reasonable geometric symmetry, which the inner arc are folded evenly along the axial direction and replaced alternated arranged.Its structure is very similar to the Nor Pak. It is a ideal replacement of gas & liquid scrubbing.

Metal tellerette ring packing is made of sheet metal stamping, stretching into specific calender, mesh surface into the rules of the diamond mesh, wire mesh corrugated packing geometric rules. Garland filler available various materials processing, material selection of a wire mesh packing is wide, and corrosion resistant performance is good.Garland filler has a wreath of plastic packing and garland filler metal.The wreath of plastic packing appear earlier, and more for gas washing, purification tower.Metal Tellerette Packing like ellipse is made of many enlaced cirques. Due to its high liquid storage in lacuna of packing, it prolongs time of gas-liquid contact, enhance the efficiency of transfer, It has the characteristic of big voidage, low pressure drop, sufficiency gas-liquid contact,low weight.

Adopting PP as material, it was produced by foaming and contracting method,which divided into edge or without edge covering ball.When covering ball floats onto water, the overlapped edge will short Floating cover’ s void fraction so as to reduce heat loss and evaporation rate.It is not only reduce acid-mist mostly and improve the pollution of CO2 in air ,but also protect water’ s quality, purify environment and so on.  

VSP ring also called inner arc ring. It is commonly made of stainless steel 304, 316 materials. Metallic VSP rings have reasonable geometric symmetry, which the inner arc are folded evenly along the axial direction and replaced alternated arranged.

Flat ring is also called SMR(Super Mini Ring), It s an advanced random packing in the column tower packing. It has similar structure with cascade mini ring, There is not flanging structure at the top and bottom. It can improve the packing strength through adjust the arc of internal blade. It has reasonable flow structure, low pressure drop and high mass transfer performance. Super mini ring has two main types, which names as QH-1 and QH-2.

It was invented by South China University of Technology. Unique conjugated curve finned structure can change point-to-point contacting instead of linear contacting between packing. Therefore, it promote liquid evenly distribution, avoid packing overlapping phenomenon and increase liquid gathering & dispersing etc  

It was developed by British company MTL Ltd, which also called CMR. Metal Cascade Ring is a new type of bulk packaging with the advantages of high capacity,good stain resistance and low pressure drop.Its sides have one or two beveled edges, which have hhigher mechanical strength and better gas passage than pall rings.Metal cascade rings feature a rectangular opening,curved leaves,tapered edges, and reduced height.

It is a earliest development of random packing, which its height is equal to outside diameter. Raschig Ring was invented by German Chemist Friedrich Raschig in 1914, it also marks that the development of fills hds entered a scientific track. However, in the actual application, Such as ” Wall flow, Channel flow and so on” often happened in Packed bed.