Manual

Page 18 Form #04-VAM-UM-00229 09/12
DETERMINE FLOW RATES USING DIFFERENT PRESSURES & TEMPERATURES
scfm actual
scfm indicated
fxfxf
()
()
=
13
2
Where f
1
= Conversion Factor for Inlet Pressure
f
2
= Conversion Factor for Inlet Pressure
f
3
= Conversion Factor for Inlet Pressure
Table 1 - Pressure Correction Factor (f
1
) Operating Pressure
psig 25 50 75 100 125 150 175 200 225 250
BAR 1.7 3.5 5.2 6.9 8.6 10.4 12.1 13.8 15.5 17.2
kPa 172 345 517 689 862 1034 1207 1379 1551 1724
f
1
1.700 1.331 1.131 1.00 .902 .835 .778 .731 .692 .658
f
kPa
1
790 857
101 357
=
+
.
.
f
BAR
1
7 914
1 014
=
+
.
.
f
psig
1
114 7
14 7
=
+
.
.
Table 2 - Temperature Correction Factor (f
2
)
ºF +10 +30 +50 +70 +90 +110 +130 +150 +170 +190
°C -12.2 -1.1 +9.9 +21.0 +32.1 +43 +54 +65 +76 +88
F
2
.942 .962 .981 1.00 1.018 1.037 1.055 1.072 1.090 1.107
f
F
2
460
530
=
+°
f
C
2
273
293
=
+°
Table 3 - Specic Gravity Correction Factor (f
3
)
fSpGr3 = ..
FIGURE 16  CONVERSION CHART