General information Useful calculation data
7
Equation
Use to calculate
Formula
The steam valve Kv, given upstream pressure, mass flowrate and a pressure drop less than CPD
11
K v =
m 3 / h . bar
12 P 1
1 - 5.67 (0.42 - x) 2
P 1 - P 2
P
12
x =
=
The pressure drop ratio ‘x’
P 1
P 1
The steam valve Kv, given the upstream pressure mass flowrate and a pressure drop greater than CPD
13
K v =
m 3 / h . bar
12 P 1
The steam mass flowrate given upstream pressure Kv and a pressure drop less than CPD
14
= 12 P
kg / h
1 K v
1 - 5.67 (0.42 - x) 2
The steam mass flowrate given upstream pressure, Kv and a pressure drop greater than CPD
15
= 12 P 1 K v
kg / h
1
A water control valve Kv given volume flowrate and pressure drop
16
K v = w
m 3 / h . bar
P
7.5 26
TI-GCM-13 CM Issue 3
Page 2 of 4
Heating formulas
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