Dungs DMV-DLE/634 설치 지침 매뉴얼 - 페이지 8
{카테고리_이름} Dungs DMV-DLE/634에 대한 설치 지침 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Dungs DMV-DLE/634 9 페이지. Dual modular nema 4x safety shutoff valves with proof of closure
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Flow Curve
Pressure Drop for other Gases
To determine the pressure drop when using a gas other than
natural gas, use the flow formula below and f value located
in the table below to determine the "corrected" flow rate in
CFH through the valve for the other gas used. For example,
Determining equivalent flow through valves using another gas
°
V
gas used
Density of Natural gas
f =
Density of gas used
Flow (CFH) of natural gas; s.g. 0.65 at 60 °F
°
= V
x f
Natural gas
Based on 60 °F
14.65 psia, dry
when using propane, divide the volume (CFH) of propane
required for the application by the calculated value f (f = 0.66
for propane). Use this "corrected" flow rate and the flow curve
on the next page to determine pressure drop for propane.
Type of gas
Density
[kg/m
Natural gas
0.81
Butane
2.39
Propane
1.86
Air
1.24
s.g.
f
]
3
0.65
1.00
1.95
0.58
1.50
0.66
1.00
0.80
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