Compressed Air Best Practices - April 2008 - (Page 22) | 04/08 Compressed Air Industry PLASTICS BLOW-MOLDING | PET PLANTS USING BOOSTERS FOR HIGH-PRESSURE AIR The use of high-performance boosters to raise low-pressure air (100 psig class) to high-pressure air (500–600 psig) for the blow-molders is very power efficient and offers good operating performance and reliability when well applied. Selecting a Booster How many stages? From a durability standpoint the booster should be selected to handle the required volume of air (scfm) and raise it to the final discharge pressure (nominal 550 psig) from the nominal inlet pressure (115 psig) with reasonable compression ratios per stage (2.5 to 3.5 ratios per stage). With the above example, the CR (compression ratios) would be: p Final Pressure (550 psig +14.5 psig) = 564.5 psig ÷ Inlet pressure (115 psig + 14.5 psig) = 129.5 psig or 4.36 compression ratio (This equation makes no sense), which is somewhat high using a single stage unit for continuous industrial duty This is about 2.09 compression ratios each in a two-stage booster (square root of 4.36) and is very conservative and well applied. p Other Considerations — There are other considerations that the Booster manufacturer will consider in recommending a unit for this application such as: p p p Rod load acceptability Proper valve action and operation Cooling capability What Size Booster — What Basic Layout? The size selection is dependent on the basic demand profile for example, are we going to apply one primary air compressor for each booster and separate low-pressure air compressors to serve the low-pressure system or put all the low-pressure air into one central low-pressure supply (headers & receivers) and allow the boosters to pull the air as needed with the remainder of the low-pressure air serving the low-pressure system. 22 www.airbestpractices.com http://www.airbestpractices.com
Table of Contents Feed for the Digital Edition of Compressed Air Best Practices - April 2008 Compressed Air Best Practices - April 2008 Contents From the Editor Utility-Air News The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations AF Compressors: Focused on 40 Bar, Oil-Free Air for the PET Industry Real World Best Practices: PET Plants Using Boosters for High-Pressure Air Guaranteeing Audit ROI for Blow-Molders Managing Vacuum Pressure Differential Are You Taking Full Advantage of Pneumatic Valve Technology? Are You Strategic? Resources for Energy Engineers: Training Calendar & Product Picks Wall Street Watch Advertiser Index Job Market Compressed Air Best Practices - April 2008 Compressed Air Best Practices - April 2008 - Compressed Air Best Practices - April 2008 (Page Cover1) Compressed Air Best Practices - April 2008 - Compressed Air Best Practices - April 2008 (Page Cover2) Compressed Air Best Practices - April 2008 - Compressed Air Best Practices - April 2008 (Page 3) Compressed Air Best Practices - April 2008 - Contents (Page 4) Compressed Air Best Practices - April 2008 - Contents (Page 5) Compressed Air Best Practices - April 2008 - Contents (Page 6) Compressed Air Best Practices - April 2008 - From the Editor (Page 7) Compressed Air Best Practices - April 2008 - Utility-Air News (Page 8) Compressed Air Best Practices - April 2008 - Utility-Air News (Page 9) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 10) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 11) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 12) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 13) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 14) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 15) Compressed Air Best Practices - April 2008 - The Compressed Air Audit of the Month: Minimizing Blow-Molding Pressure Fluctuations (Page 16) Compressed Air Best Practices - April 2008 - AF Compressors: Focused on 40 Bar, Oil-Free Air for the PET Industry (Page 17) Compressed Air Best Practices - April 2008 - AF Compressors: Focused on 40 Bar, Oil-Free Air for the PET Industry (Page 18) Compressed Air Best Practices - April 2008 - AF Compressors: Focused on 40 Bar, Oil-Free Air for the PET Industry (Page 19) Compressed Air Best Practices - April 2008 - AF Compressors: Focused on 40 Bar, Oil-Free Air for the PET Industry (Page 20) Compressed Air Best Practices - April 2008 - AF Compressors: Focused on 40 Bar, Oil-Free Air for the PET Industry (Page 21) Compressed Air Best Practices - April 2008 - Real World Best Practices: PET Plants Using Boosters for High-Pressure Air (Page 22) Compressed Air Best Practices - April 2008 - Real World Best Practices: PET Plants Using Boosters for High-Pressure Air (Page 23) Compressed Air Best Practices - April 2008 - Real World Best Practices: PET Plants Using Boosters for High-Pressure Air (Page 24) Compressed Air Best Practices - April 2008 - Real World Best Practices: PET Plants Using Boosters for High-Pressure Air (Page 25) Compressed Air Best Practices - April 2008 - Real World Best Practices: PET Plants Using Boosters for High-Pressure Air (Page 26) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 27) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 28) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 29) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 30) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 31) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 32) Compressed Air Best Practices - April 2008 - Guaranteeing Audit ROI for Blow-Molders (Page 33) Compressed Air Best Practices - April 2008 - Managing Vacuum Pressure Differential (Page 34) Compressed Air Best Practices - April 2008 - Managing Vacuum Pressure Differential (Page 35) Compressed Air Best Practices - April 2008 - Are You Taking Full Advantage of Pneumatic Valve Technology? (Page 36) Compressed Air Best Practices - April 2008 - Are You Taking Full Advantage of Pneumatic Valve Technology? (Page 37) Compressed Air Best Practices - April 2008 - Are You Taking Full Advantage of Pneumatic Valve Technology? (Page 38) Compressed Air Best Practices - April 2008 - Are You Taking Full Advantage of Pneumatic Valve Technology? (Page 39) Compressed Air Best Practices - April 2008 - Are You Strategic? (Page 40) Compressed Air Best Practices - April 2008 - Are You Strategic? (Page 41) Compressed Air Best Practices - April 2008 - Are You Strategic? (Page 42) Compressed Air Best Practices - April 2008 - Are You Strategic? (Page 43) Compressed Air Best Practices - April 2008 - Resources for Energy Engineers: Training Calendar & Product Picks (Page 44) Compressed Air Best Practices - April 2008 - Resources for Energy Engineers: Training Calendar & Product Picks (Page 45) Compressed Air Best Practices - April 2008 - Wall Street Watch (Page 46) Compressed Air Best Practices - April 2008 - Wall Street Watch (Page 47) Compressed Air Best Practices - April 2008 - Wall Street Watch (Page 48) Compressed Air Best Practices - April 2008 - Advertiser Index (Page 49) Compressed Air Best Practices - April 2008 - Job Market (Page 50) Compressed Air Best Practices - April 2008 - Job Market (Page Cover3) Compressed Air Best Practices - April 2008 - Job Market (Page Cover4)
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.