24
■
Pressure loss
●
Inlet pressure 0.01MPa
●
Inlet pressure 0.3MPa
●
Inlet pressure 0.7MPa
●
Inlet pressure 0.9MPa
When the
MVF
is used for a gas other than air, multiply by the appropriate specific gravity below.
Example)
For the
MVF150
, with a inlet pressure of 0.9MPa and a flow rate of 6000m
3
/h
(normal), the pressure loss of natural gas can be calculated as follows:
Using the graph for 0.9MPa primary pressure, the pressure loss is 2kPa at a flow
rate of 6000m
3
/h (normal). When this is multiplied by the specific gravity of nat-
ural gas, 0.64, the pressure loss is:
2kPa
×
0.64 = 1.28kPa
0 2000 4000 6000 8000 10000 12000 14000 16000 18000
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Pressure loss (kP
a)
Flow rate m
/h(normal)
3
0 2000 4000 6000 8000 10000 12000 14000
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Pressure loss (kP
a)
Flow rate m
/h(normal)
3
0 1000 2000 3000 4000 5000 6000 7000
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Pressure loss (kP
a)
Flow rate m
/h(normal)
3
0 200 400 600 800 1000 1200 1400 1600 1800 2000
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Pressure loss (kP
a)
Flow rate m
/h(normal)
3
MVF050 (Pipe size 50A)
MVF080 (Pipe size 80A)
MVF100 (Pipe size 100A)
MVF150 (Pipe size 150A)
Chapter 5. SPECIFICATIONS
Specific gravity of each gas (when air is 1.0)
Argon
1.38
Carbon dioxide
1.53
Oxygen
1.11
Natural gas (LNG base)
0.64
Methane 100%
0.56
Propane 100%
1.56
Butane 100%
2.08
