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# Vacuum Pipes - Pressure Loss vs. Air Flow

## Calculate pressure drops in vacuum pipe lines.

Pressure drop in vacuum pipelines:

### Air Flow - scfm - and Pressure Drop - in Hg/100 ft

The diagram is based on initial vacuum pressure 20 in Hg (67% vacuum) and steel pipes schedule 40.

• 1 in Hg = 3.37 kPa
• 1 scfm = 0.472 nl/s

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## Citation

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• The Engineering ToolBox (2008). Vacuum Pipes - Pressure Loss vs. Air Flow. [online] Available at: https://www.engineeringtoolbox.com/vacuum-pipe-line-pressure-drop-d_1197.html [Accessed Day Month Year].

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6.3.17

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