Bulletin 74.1:Y692
3
Table 1. Control Pressure Ranges
CONTROL PRESSURE RANGE WITH
CASE BARREL POINTED DOWN
CONTROL SPRING
COLOR CODE
CONTROL SPRING
PART NUMBER
SPRING WIRE
DIAMETER
SPRING FREE
LENGTH
In. mm In. mm
Light Spring
Assembly
1 to 3 in. w.c. / 2 to 7 mbar
(2)(3)
3 to 11 in. w.c. / 7 to 27 mbar
(2)(4)
6.5 in. w.c. to 1.2 psig / 16 mbar to 83 mbar
(5)
0.7 to 2 psig / 48 mbar to 0.14 bar
1 to 3.2 psig / 69 mbar to 0.22 bar
Brown
Iridite
Green
Blue
Orange
1D892527022
0B019727052
0B019427052
0B019627032
0A081127202
0.109
0.148
0.187
0.225
0.250
2.77
3.76
4.75
5.71
6.35
6.12
6.00
6.00
6.00
6.00
155
152
152
152
152
Heavy spring
Assembly
2 to 5.5 psig / 0.14 to 0.38 bar
4 to 10 psig / 0.28 to 0.69 bar
Silver with green stripe
Silver
0Y066427022
1H802427032
0.363
0.406
9.22
10.3
6.00
6.00
152
152
1. Install with spring case pointing down to achieve low setpoints in these spring ranges.
2. Do not use Fluorocarbon (FKM) diaphragm with these springs at diaphragm temperature lower than 60°F / 16°C.
3. Installation with spring case pointing up will change outlet (control) pressure range to 3 to 5 in. w.c. / 7 to 12 mbar.
4. Installation with spring case pointing up will change outlet (control) pressure range to 5.75 to 14 in. w.c. / 14 to 35 mbar.
5. Installation with spring case pointing up will change outlet (control) pressure range to 7.5 in. w.c. to 1.3 psig / 19 to 90 mbar.
Table 2. Flow Rate Conversion
(1)
MULTIPLY MAXIMUM PUMP RATE OUT BY TO OBTAIN
U.S. GPM
U.S. GPH
m
3
/hr
8.021
0.1337
1.01
SCFH
SCFH
Nm
3
/H
Barrels/hr
Barrels/day
5.615
0.2340
SCFH
SCFH
1. Gas ow of blanketing gas to replace liquid pumped out.
Table 4. Gas Flow Required for Thermal Heating (Outbreathing) or Cooling (Inbreathing) per API 2000 (Interpolate for Intermediate size)
VESSEL CAPACITY AIR FLOW RATE REQUIRED
Barrel Gallon Liter SCFH Nm
3
/h
60
100
500
1000
2000
2500
4200
21,000
42,000
84,000
9500
16,000
79,500
159,000
318,000
60
100
500
1000
2000
1.6
2.7
1.3
26.8
53.6
3000
4000
5000
10,000
15,000
126,000
168,000
210,000
420,000
630,000
477,000
636,000
795,000
1,590,000
2,385,000
3000
4000
5000
10,000
15,000
80.4
107
134
268
402
20,000
25,000
30,000
35,000
40,000
840,000
1,050,000
1,260,000
1,470,000
1,680,000
3,180,000
3,975,000
4,769,000
5,564,000
6,359,000
20,000
24,000
28,000
31,000
34,000
536
643
750
831
911
45,000
50,000
60,000
70,000
80,000
1,890,000
2,100,000
2,520,000
2,940,000
3,360,000
7,154,000
7,949,000
9,539,000
11,129,000
12,718,000
37,000
40,000
44,000
48,000
52,000
992
1072
1179
1286
1394
90,000
100,000
120,000
140,000
160,000
3,780,000
4,200,000
5,040,000
5,880,000
6,720,000
14,308,000
15,898,000
19,078,000
22,437,000
25,437,000
56,000
60,000
68,000
75,000
82,000
1501
1608
1822
2010
2198
180,000 7,560,000 28,616,000 90,000 2412
Table 3. Conversion Factors (for converting Nitrogen ow rates to other gas ow rates)
BLANKET GAS SPECIFIC GRAVITY CORRECTION FACTOR
Natural Gas 0.60 1.270
Air 1.00 0.985
Dry CO
2
1.52 0.797
Correction Factor = 0.985
SG
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