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Technical Instructions
Document Number CC1N7636us
February 09, 2016
Gas flow charts
100
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5
7
100
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3
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100
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100
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10
Page 6
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1000
2
3
4
4
5
7
1000
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3
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1000
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1000
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100
Figure 2. Sizing VGG10.xxxU valves without AGA66 NEMA 4 kit
Assumptions:
1) Pressure downstream of valve is atmospheric
2) Maximum temperature is 140 °F
3) Valve in fully open position
NOTE:
Pressure drop is for one valve when using SKPx5.xxxUx actuator, without a
NEMA 4 kit (AGA66).
CAUTION:
Do not oversize valves equipped with regulating actuators SKP25.xxxUx,
SKP55.xxxUx or SKP75.xxxUx Oversizing may limit turndown and could cause
oscillations.
5
7
10000
2
3
4
4
5
7
10000
2
3
4
5
7
10000
2
4
5
7
10000
2
3
2
3
4
5
7
VGG
5
7
100000
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3
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7
100000
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100000
4
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100000
2
1000
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7
Siemens AG Building Technologies Division
VGG Series Valves
´´W.C. mbar
1,000
2,000
700
500
1,000
400
300
700
200
500
400
300
100
200
70
50
100
40
30
70
50
20
40
30
10
20
7
5
10
4
3
7
2
5
4
3
1
2
0.7
0.5
0.4
1
0.3
0,7
0.2
0,5
0,4
Sp. Gr.
cf/h
1 Natural gas
0.64
cf/h
2 Propane gas
1.52
cf/h
3 Butane gas
2.00
2
cf/h
4 Air
1.00
3
m3/h 4 Air
1.00
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