Model 243 Capacity Tables
9
2” Models 243-12-1 and 243-12-2 in SCFH of Natural Gas
(0.6 Specific Gravity - 14.65 psia - 60
º
F)
(continued)
Outlet Pressure
and Spring
Set Point 18” w.c.
3” w.c. Droop
Orange Spring
12” to 28” w.c.
143-16-021-06
Set Point 1 psi
0.31 psi Droop
Orange Spring
12” to 28” w.c.
143-16-021-06
Set Point 1 psi
0.2 psi Droop
Black Spring
1 to 2 psi
143-16-021-07
Set Point 2 psi
0.6 psi Droop
Cadmium Spring
1
1
⁄
2
to 3 psi
143-16-021-08
Set Point 3 psi
0.35 psi Droop
Cadmium Spring
1
1
⁄
2
to 3 psi
143-16-021-08
Inlet
Pressure
psi
1
1
⁄
4
”
1”
3
⁄
4
”
3
⁄
4
”
1
⁄
2
”
3
⁄
8
”
1
⁄
4
”
30
o
30
o
30
o
10
o
10
o
10
o
10
o
Orifice Size and Valve Angle
1
2
5
10
15
25
40
60
80
100
125
2
5
10
15
25
40
60
80
100
125
2
5
10
15
25
40
60
80
100
125
5
10
15
25
40
60
80
100
125
5
10
15
25
40
60
80
100
125
2500
4200
8000
12000
13500
6500
8000
9000
12000
3350
6600
11000
13000
8200
12500
15500
3500
8000
10500
2000
3400
7100
12000
14500
16500
5000
7500
8500
11000
13500
3000
5900
10000
12000
15000
7400
11300
14500
18000
3000
7000
10000
11500
1400
2700
5600
10500
15000
20000
20000
4000
6000
8000
10000
12500
14000
2000
4200
7600
9300
16500
20000
5200
8700
11500
16500
20000
2000
5500
8000
9800
21500
1200
2400
4700
7500
9500
11500
13500
15000
4000
6000
8000
10000
11500
13000
15000
1900
3900
6500
8300
11000
14000
15500
4800
7800
10000
13500
16500
16500
1800
5000
7000
9000
20000
21000
950
1500
2800
4800
6500
9200
12000
13000
14000
14000
2000
4000
5500
7000
9500
11000
13500
15000
16000
1200
2400
4100
5600
8500
12500
13000
14000
14000
2900
4800
6500
9000
12500
15500
16000
16000
1400
3000
4000
5600
10500
14500
18000
20500
650
1000
1800
2900
3900
5300
7500
10000
12000
12000
12000
1300
2200
3000
4000
5500
7400
10000
13000
14000
14000
1000
1600
2800
3800
5300
7500
10000
12000
12000
12000
1900
3000
3800
5300
7600
10000
12000
12000
12000
1100
2000
3000
4500
7500
10500
13500
16400
19000
500
950
1400
1700
2300
3200
4400
5600
7000
8000
500
1000
1400
1800
2400
3300
4500
6000
7000
8500
500
1000
1450
1700
2400
3400
4400
5600
7000
8000
900
1400
1700
2400
3400
4600
5600
7000
8000
750
1100
1600
2000
3500
4500
6000
7500
9000
Note: The performance data is based on normal testing at 70
º
F flowing temperature.
Changes in performance can occur at extreme low flowing temperatures.
Last capacity figure in each group indicates maximum allowable inlet pressure (except for emergency conditions). Heavy
stepped line indicates the recommended maximum capacity and inlet pressure for each orifice for operation within the
optimum performance
range.