Amistco Orifice Riser Type Technical Bulletin

AMISTCOProduct Bulletin – ALDO11/03AMISTCO Liquid Distributors – Orifice Riser Type AMISTCO Orifice Type Liquid Distributors are mainly suitable for low turn-down ratios. Three basic types areavailable – Plate Type, Pan Type for smaller sized towersand Ladder Type.For the Plate and Pan Type distributors, the gas flowsthrough risers that are either round or rectangular in shape.The liquid collects on the deck and flows through the orifices to the packing. In Pan Type designs, the gas also flowsthrough the annulus between the distributor and the vessel.By varying the size and number of orifices, the distributorcan be made adaptable to a wide range of flow rates. Forhigh-efficiency designs, Amistco can provide drip tubesinstead of orifices.Ladder Type distributors are suitable for liquid feed underpressure, and where limited space is available for the distributor. These provide a high amount of free area for gasflow and uniform liquid distribution over the entire towercross section.All types are available in diverse materials – metals, thermoplastics and FRP.The basic distributor design can be modified for use as either Redistributors or Liquid Collectors. ForRedistributors hats are incorporated on top of the risers,while with Liquid Collectors the orifices are not provided.Other variants include adding “anti-migration” bars at thebottom of the distributors that eliminate the need forseparate bed limiters.23147 Hwy. 6 Alvin, Texas 77511 • Ph: (281) 331-5956 • Fax: (281) 585-1780 • www.amistco.com • amistco@amistco.com24 Hour Emergency Service Available Emergency Phone:1-800-839-6374Mist Eliminators | Liquid/Liquid Coalescers | Trays, Packing & InternalsLadder TypePlate TypePan Type