Flowmetering Gilflo and ILVA flowmeters 3
m 500
D E D L
Q E =
Sizing the ILVA flowmeter (imperial) In order to determine the flow capacity of a Gilflo 'B' flowmeter for a particular application, it is necessary to calculate the equivalent water flowrate (Q E ) in US GPM using the following formulas. D L Q E = Q L D E
(0.0158) x m
P F P S
T S T F
Q E = D x
x
m 500 500 m 500 m 500
D E D L D E D L D E D E D L D L
Q E = Q E =
Liquids
or
Q E = Q E =
P S P F
T F T S
D L D E D E D L D L D E D L
Q E = Q L Q E = Q L E = (0.948) x Q G
D x
x
(0.0158) x m (0.0158) x m Q E = (0.0158) x m v E = Q L D E Q E = Q L
Gases and steam actual flow conditions
P F P S P S P F P F P S P F P S
T S T F T S T F T S T F T S T F
Q E = D x
x x
Q E
(0.0158) x m (0.0158) x m
Q E = D x Q E = D x
x x
P S P F P S P F P S P S P F P F
T F T S T F T S T F T S T F T S
Gases standard conditions
Q E = (0.948) x Q G Q E = (0.948) x Q G or
D x D x
x x
3.2 36
Q E = (0.0158) x m v Q E = (0.0158) x m v Q E = (0.948) x Q G D x Q E = (0.948) x Q G D x
x x
Q E = (0.0158) x m v Q E = (0.0158) x m v
D S D E
= Density of gas at 14.7 psi a, 520 °R (60 °F) (lb/ft 3 )
= Density of gas at of water at calibration (62.305 lb/ft 3 )
D L = Maximum flow rate of service liquid (US GPM) m = maximum flow rate of service liquid (lb/hr) P S = Standard pressure 14.70 psi a P F = Actual flow pressure in same absolute units as P S Q E = Equivalent water flowrate 70 °F (U.S. GPM) Q L = Maximum liquid flowrate (U.S. GPM) Q G = Maximum gas flowrate (SFCM) T S = Standard temperature (520 °R) T F = Actual flow temperature (°R = °F + 460) v = specific volume of steam at normal pressure and temperature (ft 3 /lb)
TI-P337-08 EMM Issue 9
Page 6 of 7
Gilflo 'B' Flowmeter Pipeline Unit
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