Technical Instructions
VGG Series Valves
Document Number CC1N7636us
February 09, 2016
Page
6
Siemens AG Building Technologies Division
Gas flow charts
VGG
1,000
700
500
400
300
200
100
70
50
40
30
20
10
7
5
4
3
2
1
0.7
0.5
0.4
0.3
0.2
cf/h 1 Natural gas 0.64
cf/h 2 Propane gas 1.52
cf/h 3 Butane gas 2.00
cf/h 4 Air 1.00
m3/h 4 Air 1.00
7 100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2
100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2 3
7 100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2
100 2 3 4 5 7 1000 2 3 4 5 7 10000 2 3 4 5 7 100000 2 3
3 4 5 7 10 2 3 4 5 7 100 2 3 4 5 7 1000 2 3 4 5 7
Sp. Gr.
1,000
700
500
400
300
200
100
70
50
40
30
20
10
7
5
4
3
2
1
0,7
0,5
0,4
´´W.C. mbar
P
ress
u
re
d
ro
p
p
2,000
1/
2"
3/4
"
1"
1 1/
2"
2"
2
1/
2"
3"
76
36
z
0
1
u
s
/0
8
1
5
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.
