Smith GBX 70 Installation And Operation Instructoins page 14

14
INSTALLATION AND OPERATING INSTRUCTIONS
Table 5.1: Boiler – Natural Gas
Size
Cubic Feet / Hour
70 70
105 105
140 140
175 175
195 195
Table 5.2: Boiler – LP Gas
Size
Cubic Feet / Hour
70 28
105 42
140 56
175 70
195 78
Table 5.3: Pipe Capacity
Capacity of pipe of different diameters and lengths in cubic feet
per hour [cubic meter per hour] with a pressure drop of 0.3
inches of water (75 Pa) and specific gravity of 0.60. No
allowance for an ordinary number of fittings is required.
Pipe
Length in 3/4"
Feet Pipe
[Meters]
10 [3.0] 278 [7.9] 520 [14.7] 1050 [29.7] 1600 [45.3]
20 [6.1] 190 [5.4] 350 [9.9]
30 [9.1] 152 [4.3] 285 [8.1]
40 [12.2] 130 [3.7] 245 [6.9]
50 [15.2] 115 [3.3] 215 [6.1]
60 [18.3] 105 [3.0] 195 [5.5]
Maximum Capacity Correction Factors for
Specific Gravity other than 0.60.
Specific Gravity 0.50 0.55 0.60 0.65 0.70 0.75
Correction Factor 1.10 1.04 1.00 0.96 0.93 0.90
Specific Gravity 0.80 0.85 0.90 1.00 1.10 1.20
Correction Factor 0.87 0.84 0.82 0.78 0.74 0.71
Specific Gravity 1.30 1.40 1.50 1.60 1.70 1.80
Correction Factor 0.68 0.66 0.63 0.61 0.59 0.58
Input
Cubic Meters / Hour
2.0
3.0
4.0
5.0
5.5
Input
Cubic Meters / Hour
0.8
1.2
1.6
2.0
2.2
1" 1-1/4" 1-1/2"
Pipe Pipe Pipe
730 [20.7] 1100 [31.1]
590 [16.7] 890 [25.2]
500 [14.2] 760 [21.5]
440 [12.5] 670 [19.0]
400 [11.3] 610 [17.3]