SV2 Series Safety Shut-off Valves
14
32-00029—02
MCR37077
1
10
100
1,000
10,000
1.5 IN (DN40) ON/OFF VALVE CAPACITY CURVES
NATURAL GAS FLOW - CFH (CUBIC FEET PER HOUR)
- M
3
/HR (METERS CUBED PER HOUR)
28.32
283.2
651.3
747
249
24.9
2.49
PRESSURE DROP FORMULAS PER FLANGE SIZE AND UNIT TYPES:
A.) CFH AND IN W.C.
• 1 IN (DN25)
= 0.000000838 X (FLOW
2
)
• 1-1/4 IN (DN32) = 0.000000592 X (FLOW
2
)
• 1-1/2 IN (DN40) = 0.000000578 X (FLOW
2
)
• 2 IN (DN50)
= 0.000000539 X (FLOW
2
)
B.) M
3
/HR AND MBAR
• 1 IN (DN25)
=
0.002601 X (FLOW
2
)
• 1 1/4 IN (DN32) = 0.001838 X (FLOW
2
)
• 1-1/2 IN (DN40) = 0.0001795 X (FLOW
2
)
• 2 IN (DN50)
= 0.0001673 X (FLOW
2
)
23,000
PRESSURE DROP
- MBAR - INCHES W.C.
300
1 INCH (DN25) FLANGE
1-1/4 INCH (DN32) FLANGE
1-1/2 INCH (DN40) FLANGE
2 INCH (DN50) FLANGE
1
Fig. 8: 1.5 in (DN40) On/off valve capacity curves.