Compressed Air Best Practices - September 2008 - (Page 29) Focus Industry FOOD PACKAGING & PROCESSING | 09/08 | Does Accurate Air recommend any “Bakery Best Practices?” We are trying to establish some “Best Practices” with bakeries. For example: 1. Bakeries have many open-blowing applications. Most are using a ¾-inch pipe with 32 holes drilled in it to blow compressed air onto the application. Some do have an air knife with some sort of nozzle, but most use inefficient drilled pipe. The bakery blow-off applications include; a. Open blowing to de-pan the buns from the pans. Air lifts the bread off of the pan when it comes out of the oven. Sometimes the glazing of the pan wears off and some buns stick — so the practice has been to use compressed air to blow them off the pan. Blow the flour off the bread and get it airborne. Vacuum then reclaims the flour in a flour-reclaim system. After a bread loaf is sliced, they don’t want remaining breadcrumbs in the package (after the slicer). Crumbs are blown off — usually with unregulated choking valves. Pan cleaning after the bread is out. No one wants burnt pieces of bread on their hamburger bun. Blow the pans clean with air before they are loaded with dough again. Sometimes they’ll blow it three times. If a bakery is doing powdered or glazed doughnuts, they’ll lay a long piece of pipe across the conveyor line and shoot the air down onto the product. b. Centralized blowers reduce the noise in the plant created by many individual point-of-use blowers. Less maintenance — just two inlet filters. In general you are shutting down a full air compressor. Usually they are running two air compressors fully loaded. We usually shut down one of the two air compressors. The final advantage is that you don’t need compressed air treatment equipment at the open blowing locations because the centrifugal blower is oil-free. Centrifugal oil-free blowers are recommended for bakeries. c. d. e. b. Recession Proof With the skyrocketing costs of just about everything – only the most efficient compressor available can reverse these trends. c. d. e. Introducing the proven Gardner Denver VST two-stage, variable speed compressor. Producing more CFM per kWh consumed than the competition, the Gardner Denver VST can reduce your cost of compressed air up to 45% or more. This means lower electric bills, lower production costs and years of reliable, efficient compressed air. And the proof of this kind of innovative efficiency is a better bottom-line today and well into the future. Consult your local Gardner Denver expert at 800-682-9868 and experience proven results. 2. The solution is a low-pressure blower. We recommend a centrifugal Vortron blower because we get more air volume from them. a. Installation cost is lower using two or three units for the whole system — rather than installing high unit quantities of positive displacement or regenerative point-of-use blowers. www.GardnerDenverProducts.com Phone: 800.682.9868 • Email: gd.results@gardnerdenver.com Performance Tested and Rated in Accordance with ISO 1217 ANNEX C CAGI/PNEUROP PN2CPTC2 www.airbestpractices.com 29 http://www.GardnerDenverProducts.com http://www.GardnerDenverProducts.com http://www.airbestpractices.com
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