Engineered Systems - April 2008 - (Page 48) Cleanroom Design Class 100,000 Sterile packaging Precision measuring equipment Medical device injection molding Precision machining (+0.001) Electronic component assembly Space classification Class 1 (ISO 3) Class 10 (ISO 4) Class 100 (ISO 5) Class 1,000 (ISO 6) Class 10,000 (ISO 7) Class 100,000 (ISO 8) ACH 600 to 675 360 to 600 300 to 600 113 to 188 30 to 75 15 to 30 Average air velocity 80 to 90 fpm 60 to 90 fpm 40 to 80 fpm 15 to 25 fpm 4 to 10 fpm 2 to 4 fpm Class 10,000 Tableting room Pharmaceutical compounding Satellite assembly General surgery OR Metrology instrumentation Values based upon cleanroom ceiling height of 8 feet. TABLE 3. Air velocity and air change rate. Class 1,000 Thin film coating Class 100 Sterile fill suite Fine optics Aseptic processes Precision machining (+00001) Class 10 or lower Semiconductor chip production Nanotechnology production TABLE 2. Recommended process space cleanliness classification. change rate to be used. Other variables affecting space supply airflow are process exhaust airflows, air infiltrating in through doors/openings, and air exfiltrating out through doors/openings. IEST has published recommended air change rates in Standard 14644-4. Looking at Figure 1, “Gown/Ungown” has the most in/out travel but is not a process critical space, resulting in 20 ach. “Sterile Air Lock” and “Bone Cement Packaging Air Lock” are adjacent to critical production spaces and in the case of the “Bone Cement Packaging Air Lock,” the air flows from the air lock into the packaging space. Though these air locks have limited in/out travel and no particulate generating processes, their critical importance as a buffer between “Gown/Ungown” and manufacturing processes results in their having 40 ach. “Final Packaging” places the bone cement/solvent bags into a secondary package which is not critical and results in a 20 ach rate. “Bone Cement Packaging” is a critical process and has a 40 ach rate. “Solvent 48 En gi neer ed S y stem s April 2008 http://www.veris.com http://onesource.veris.com
Table of Contents Feed for the Digital Edition of Engineered Systems - April 2008 Engineered Systems - April 2008 Contents Editor’s Note Back2Basics HVAC Challenge Case In Point Commissioning Building Automation Energy Wiz HVACR Designer Tips This Time, Water Cooled Was All Wet Cleanroom Design In 10 Easy Steps It's Not The Heat, It's The Humidity Issues & Events Computers and Software Products Glossary Classifieds Advertiser Index Tomorrow’s Engineer Engineered Systems - April 2008 Engineered Systems - April 2008 - (Page Intro) Engineered Systems - April 2008 - Engineered Systems - April 2008 (Page 1) Engineered Systems - April 2008 - Engineered Systems - April 2008 (Page 2) Engineered Systems - April 2008 - Engineered Systems - April 2008 (Page 3) Engineered Systems - April 2008 - Contents (Page 4) Engineered Systems - April 2008 - Contents (Page 5) Engineered Systems - April 2008 - Contents (Page 6) Engineered Systems - April 2008 - Contents (Page 7) Engineered Systems - April 2008 - Editor’s Note (Page 8) Engineered Systems - April 2008 - Editor’s Note (Page 9) Engineered Systems - April 2008 - Back2Basics (Page 10) Engineered Systems - April 2008 - Back2Basics (Page 11) Engineered Systems - April 2008 - HVAC Challenge (Page 12) Engineered Systems - April 2008 - HVAC Challenge (Page 13) Engineered Systems - April 2008 - Case In Point (Page 14) Engineered Systems - April 2008 - Case In Point (Page 15) Engineered Systems - April 2008 - Case In Point (Page 16) Engineered Systems - April 2008 - Case In Point (Page 17) Engineered Systems - April 2008 - Case In Point (Page 18) Engineered Systems - April 2008 - Case In Point (Page 19) Engineered Systems - April 2008 - Case In Point (Page 20) Engineered Systems - April 2008 - Case In Point (Page 21) Engineered Systems - April 2008 - Case In Point (Page 22) Engineered Systems - April 2008 - Case In Point (Page 23) Engineered Systems - April 2008 - Case In Point (Page 24) Engineered Systems - April 2008 - Case In Point (Page 25) Engineered Systems - April 2008 - Commissioning (Page 26) Engineered Systems - April 2008 - Commissioning (Page 27) Engineered Systems - April 2008 - Building Automation (Page 28) Engineered Systems - April 2008 - Building Automation (Page 29) Engineered Systems - April 2008 - Energy Wiz (Page 30) Engineered Systems - April 2008 - Energy Wiz (Page 31) Engineered Systems - April 2008 - HVACR Designer Tips (Page 32) Engineered Systems - April 2008 - HVACR Designer Tips (Page 33) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 34) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 35) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 36) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 37) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 38) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 39) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 40) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 41) Engineered Systems - April 2008 - This Time, Water Cooled Was All Wet (Page 42) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 43) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 44) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 45) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 46) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 47) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 48) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 49) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 50) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 51) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 52) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 53) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 54) Engineered Systems - April 2008 - Cleanroom Design In 10 Easy Steps (Page 55) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 56) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 57) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 58) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 59) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 60) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 61) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 62) Engineered Systems - April 2008 - It's Not The Heat, It's The Humidity (Page 63) Engineered Systems - April 2008 - Issues & Events (Page 64) Engineered Systems - April 2008 - Issues & Events (Page 65) Engineered Systems - April 2008 - Issues & Events (Page 66) Engineered Systems - April 2008 - Issues & Events (Page 67) Engineered Systems - April 2008 - Issues & Events (Page 68) Engineered Systems - April 2008 - Computers and Software (Page 69) Engineered Systems - April 2008 - Products (Page 70) Engineered Systems - April 2008 - Products (Page 71) Engineered Systems - April 2008 - Products (Page 72) Engineered Systems - April 2008 - Glossary (Page 73) Engineered Systems - April 2008 - Classifieds (Page 74) Engineered Systems - April 2008 - Classifieds (Page 75) Engineered Systems - April 2008 - Classifieds (Page 76) Engineered Systems - April 2008 - Advertiser Index (Page 77) Engineered Systems - April 2008 - Tomorrow’s Engineer (Page 78) Engineered Systems - April 2008 - Tomorrow’s Engineer (Page 79) Engineered Systems - April 2008 - Tomorrow’s Engineer (Page 80)
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