Compressed Air Best Practices - September 2008 - (Page 38) | 09/08 Focus Industry FOOD PACKAGING & PROCESSING | Eight Factor s to Consider for Efficient Blow-Off Air BY LES RAPCHAK In industrial facilities, blow-off of water, dust, coolant, etc. is achieved using either compressed air amplifiers (flow amplifiers) or by blower-operated systems. Many facilities use both types of systems. The classic energy-cost improvement opportunity exists when a facility is using open jets and copper tubing or pipe with drilled holes or open slots for blow-off air. In this situation, both compressed air amplifiers and blower-operated systems will be more efficient alternatives. Choosing which type has created both claims and counter-claims by suppliers of these technologies. The objective of this article is to provide a list of factors to be considered in order to choose the most efficient, while practical technology to provide blow-off air. How the amp works: (1) Compressed air enters the unit from the side, (2) goes around the coanda angle, (3) exits into the body, (4) draws in atmospheric air amplifying the air flow dramatically. (5) An adjustable lock ring sets the air gap to control overall flow and force needed. 38 www.airbestpractices.com http://www.airbestpractices.com
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