2007 Master Catalog - (Page 6) Vacuum Terms and Definitions LIVE CHAT! Click Here Vacuum Terms and Definitions Air Consumption: The volume of compressed air required to power the pump. Atmospheric Pressure: The atmosphere that surrounds the Earth can be considered a reservoir of low pressure air. Its weight exerts a pressure that varies with temperature, humidity and altitude. Barometer: A device usually filled with mercury that measures atmospheric pressure. Compressed Air Considerations: Standard or Average Atmospheric Pressure at Sea Level: 1HP @ 80 PSI generates 4 SCFM of flow. 29.92"Hg or [760mm Hg] Vacuum Flow: The volume of free air induced by the vacuum pump per unit of time, expressed as standard cubic feet per minute – SCFM or [liters per minute - lpm] Vacuum Force: Equal to the vacuum level X the area of the vacuum surface, i.e. holding area of a vacuum cup. Vacuum Level: The magnitude of the suction created by the vacuum pump. The unit of measure is inches of Hg ("Hg) or (mbar). Vacuum level is affected by elevation and barometric pressure. For each 1,000 feet of elevation, vacuum level decreases by 1" of Hg. Venturi’s, Ejectors, Transducers, Generators: All are air powered vacuum pumps, just different names. Facts to Remember: 50 mmHg = 1 PSI 1mmHg = 1 torr (vacuum) 1"Hg = 25.4 mmHg 2"Hg = 1 PSI 29.92"Hg = 100 Kpa 14.7 PSI = 100 Kpa 14.7 PSI = 29.92"Hg 14.7 PSI = 760 mmHg % Vacuum 10 20 30 40 50 60 70 80 90 100 "Hg 3 6 9 12 15 18 21 24 27 30 Conversion Chart – Vacuum vs. Pressure mmHg 76.92 153.85 230.77 307.69 384.62 461.54 538.46 615.38 692.31 769.23 bar -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1.0 PSI -1.47 -2.94 -4.41 -5.88 -7.35 -8.82 -10.29 -11.76 -13.23 -14.70 6 Phone: 1-800-848-8788 or 508-359-7200 E-Mail: engineering@vaccon.com https://www.websitealive5.com/2126/rLogin.asp?groupid=2126&websiteid=0&departmentid=0&sessionid_=36&loginname=&loginemail=&loginquestion=&infocapture_ids=&infocapture_values=&dl http://www.vaccon.com
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