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  AIR MOISTURE CONTENT
Grains of water in one cubic foot of air at various temperatures and percentages of saturation.
Rule of Thumb: For every 20 degrees Fahrenheit temperature drop, we loose one half the water!
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COST OF COMPRESSED AIR:
- 15% Fixed Charges: Compressor, Installation, Depreciation, Insurance, Repair.
- 15% Operating Charges: Attendance, Lubrication, Cooling-Water, Filters.
- 70% Power: Electric Motor Driven (both energy & demand) at 6 cents/kW hr.
-Facts-
- 20 cents per 1000 CF @ 100 PSIG: 200 HP = 1000 CFM X 60 min. X 24 hr. = $288.00 per day.
- Rule of Thumb: Cost $1.00 per HP per 24 hrs. at 6 cents per kW hour.
- Cost of Air Leakage 1/4" leak = 2,920,000 cu. ft. per month = $684.00.
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Electric Operating Cost Full Load KVa
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Operating Cost Per Year (8760 hours) at Stated Cost per kWh ($)
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Size HP
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@1800 RPM
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.03
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.04
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.05
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.06
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.07
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.08
|
.09
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10
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10.14
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$ 2,665
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$ 3,553
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$ 4,441
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$ 5,330
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$ 6,218
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$ 7,106
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$ 7,994
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15
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15.67
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4,118
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5,491
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6,865
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8,236
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9,609
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10,982
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12,354
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20
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20.06
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5,271
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7,029
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8,786
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10,554
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12,301
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14,058
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15,815
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25
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24.93
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6,551
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8,735
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10,919
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13,103
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15,287
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17,471
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19,655
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30
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28.58
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7,511
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10,014
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12,518
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15,022
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17,525
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20,029
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22,532
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40
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38.32
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10,070
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13,427
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16,784
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20,141
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23,498
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26,855
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30,211
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50
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47.10
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12,378
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16,504
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20,630
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24,756
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28,882
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33,008
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37,134
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60
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57.21
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15,035
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20,046
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25,058
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30,070
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35,081
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40,093
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45,104
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75
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71.10
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18,685
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24,913
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31,142
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37,370
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43,599
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49,827
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56,055
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100
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91.11
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23,944
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31,925
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39,906
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47,887
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55,869
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63,850
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71,831
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125
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118.47
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31,134
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41,512
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51,890
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62,268
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72,646
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83,024
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93,402
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150
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140.57
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36,942
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49,256
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61,570
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73,884
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86,198
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98,511
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110,825
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200
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188.65
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49,577
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66,103
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82,629
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99,154
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115,680
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132,206
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148,732
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DISCHARGE, CUBIC FEET, FREE AIR PER MINUTE:
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DIAMETER OF ORIFICE in inches
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before Orifice PSIG
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5
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15
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20
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25
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30
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35
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40
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45
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50
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60
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70
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|
80
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|
90
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|
100
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110
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|
120
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|
125
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1/64
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1/32
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1/16
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1/8
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1/4
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3/8
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1/2
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5/8
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3/4
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7/8
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1
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.062
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.248
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.993
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3.97
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15.9
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35.7
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63.5
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99.3
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143
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195
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254
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|
.105
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.420
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1.68
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6.72
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26.9
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60.5
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108
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168
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242
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329
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430
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|
.123
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.491
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1.96
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7.86
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31.4
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70.7
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126
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196
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283
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385
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503
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.140
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.562
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2.25
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8.98
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35.9
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80.9
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144
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225
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323
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440
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575
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.158
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.633
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2.53
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10.1
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40.5
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91.1
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162
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253
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365
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496
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648
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.176
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.703
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2.81
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11.3
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45.0
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101
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180
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281
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405
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551
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720
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.194
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.774
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3.10
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12.4
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49.6
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112
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198
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310
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446
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607
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793
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.211
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.845
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3.38
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13.5
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54.1
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122
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216
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338
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487
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662
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865
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.229
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.916
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3.66
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14.7
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58.6
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132
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235
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366
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528
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718
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938
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.264
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1.06
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4.23
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16.9
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67.6
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152
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271
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423
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609
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828
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1082
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.300
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1.20
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4.79
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19.2
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76.7
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173
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307
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479
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690
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939
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1227
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.335
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1.34
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5.36
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21.4
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85.7
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193
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343
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536
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771
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1050
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1371
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.370
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1.48
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5.92
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23.7
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94.8
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213
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379
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592
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853
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1161
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1516
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.406
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1.62
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6.49
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26.0
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104
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234
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415
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649
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934
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1272
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1661
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.441
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1.76
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7.05
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28.2
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113
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254
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452
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705
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1016
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1383
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1806
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.476
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1.91
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7.62
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30.5
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122
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274
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488
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762
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1097
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1494
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1951
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.494
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1.98
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7.90
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31.6
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126
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284
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506
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790
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1138
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1549
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2023
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FRICTION OF AIR IN HOSE:
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Hose size coupled each end (in.)
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Gage pressure at line (Lb.)
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Cubic foot of free air per minute passing through 50-ft. lengths of hose
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20
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30
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40
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50
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60
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70
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80
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90
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100
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110
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120
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130
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Loss of pressure (PSI) in 50-ft. lengths of hose
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1/2
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1.8
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5.0
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10.1
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18.1
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1.3
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4.0
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8.4
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14.8
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23.4
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1.0
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3.4
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7.0
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12.4
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20.0
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28.4
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0.9
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2.8
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6.0
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10.8
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17.4
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25.2
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34.6
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0.8
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2.4
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5.4
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9.5
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14.8
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22.0
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30.5
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41.0
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0.7
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2.3
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4.8
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8.4
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13.3
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19.3
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27.2
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36.6
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0.6
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2.0
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4.3
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7.6
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12.0
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17.6
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24.6
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33.3
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44.5
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3/4
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0.4
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0.8
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1.5
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2.4
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3.5
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4.4
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6.5
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8.5
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11.4
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14.2
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0.3
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0.6
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1.2
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1.9
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2.8
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3.8
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5.2
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6.8
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8.6
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11.2
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0.2
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0.5
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0.9
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1.5
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2.3
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3.2
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4.2
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5.5
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7.0
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8.8
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11.0
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0.2
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0.5
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0.8
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1.3
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1.9
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2.8
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3.6
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4.7
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5.8
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7.2
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8.8
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10.6
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0.2
|
0.4
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0.7
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1.1
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1.6
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2.3
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3.1
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4.0
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5.0
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6.2
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7.5
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9.0
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0.2
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0.4
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0.6
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1.0
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1.4
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2.0
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2.7
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3/5
|
4.4
|
5.4
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6.6
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7.9
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0.1
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0.3
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0.5
|
0.9
|
1.3
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1.8
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2.4
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3.1
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3.9
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4.9
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5.9
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7.1
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|
1
|
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|
0.1
|
0.2
|
0.3
|
0.5
|
0.8
|
1.1
|
1.5
|
2.0
|
2.6
|
3.5
|
4.8
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7.0
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|
0.1
|
0.2
|
0.3
|
0.4
|
0.6
|
0.8
|
1.2
|
1.5
|
2.0
|
2.6
|
3.3
|
4.2
|
|
|
0.1
|
0.2
|
0.4
|
0.5
|
0.7
|
1.0
|
1.3
|
1.6
|
2.0
|
2.5
|
3.1
|
|
|
0.1
|
0.2
|
0.3
|
0.5
|
0.7
|
0.8
|
1.1
|
1.4
|
1.7
|
2.0
|
2.4
|
|
|
0.1
|
0.2
|
0.3
|
0.4
|
0.6
|
0.7
|
0.9
|
1.2
|
1.4
|
1.7
|
2.0
|
|
|
0.1
|
0.2
|
0.2
|
0.4
|
0.5
|
0.6
|
0.8
|
1.0
|
1.2
|
1.5
|
1.8
|
|
|
0.1
|
0.2
|
0.3
|
0.4
|
0.5
|
0.6
|
0.7
|
0.9
|
1.1
|
1.3
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1.5
|
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Volume
Of Air Transmitted
|
Length of Run (Ft.)
50-200 | 200-500 | 500-1000 | 1000-2500 |
2500-3000
|
|
(CFM)
|
Nominal Pipe Diameter (In.)
|
|
|
|
30-60
60-100
|
1
1
|
1
1-1/4
|
1-1/4
2-1/4
|
1-1/2
|
1-1/2
|
|
100-200
200-500
|
1-1/4
2
|
1-1/2
2-1/2
|
2
3
|
2-1/2
3-1/2
|
2-1/2
3-1/2
|
|
500-1000
1000-2000
|
2-1/2
2-1/2
|
3
4
|
3-12
4-1/2
|
4
5
|
4-1/2
5
|
|
2000-4000
4000-8000
|
3-12
6
|
5
8
|
6
8
|
8
10
|
8
10
|
|
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PIPE SIZE
RECOMMENDED
FOR
TRANSMISSION OF
COMPRESSED AIR
TO 80-125 P.S.I:
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|
|
|
|
|
|
|
1/16
3/32
1/8
3/16
1/4
5/16
3/8
1/2
|
4
9
17
38
67
105
151
268
CFM
|
5
11
19
43
76
119
171
304
CFM
|
5.5
12
21
47
85
133
191
340
CFM
|
6.5
15
26
58
103
161
232
412
CFM
|
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SAND BLASTING NOZZLES: |
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