Greyline Instruments DFS 5.1, Руководство пользователя

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Page 20
DFS 5.1 Doppler Flow Switch
APPENDIX B
FLOW VELOCITY CALCULATION
Flow velocity can be calculated from the following data.
KNOWN FLOW DIVIDED BY VELOCITY
U.S. gallons/sec. 0.0408 x (pipe I.D.")² = ft/sec
U.S. gallons/min. 2.448 x (pipe I.D.")² = ft/sec
Imp. gallons/sec 0.0340 x (pipe I.D.")² = ft/sec
Imp. gallons/min 2.040 x (pipe I.D.")² = ft/sec
Litres/sec
0.1545 x (pipe I.D.")²
= ft/sec
Litres/min 9.270 x (pipe I.D.")² = ft/sec
Cubic metres/sec 0.0001545 x (pipe I.D.")² = ft/sec
Cubic metres/min
0.00927 x (pipe I.D.")²
= ft/sec
EXAMPLE: 3" ID pipe
Known Flow of 160 US gallons/min: 160 = 7.26 ft/sec
2.448 x (3)²