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Pump Tanks Chapter 6: Appendix 22 of 36
Figure 2: Standard Pumps and Trim Based on Cooling Tower Capacities
(Flow Based on 3 gpm per Ton)
American Standards
Capacity Trim Process Recirculating
Nominal Nominal flow size pump pump
cooling tower tons gallons inches hp hp
20 60 2½” 5 3
30 90 2½” 7½ 3
40 120 3” 7½ 5
50 150 3” 10 5
60 180 4” 10 5
75 225 4” 15 7½
80 240 4” 15 7½
100 300 4” 20 7½
125 375 6” 20 10
150 450 6” 25 10
175 525 6” 30 15
200 600 6” 30 15
250 750 6” 40 20
300 900 6” 50 20
Pump horsepower 1½ 3 5 7½ 10 15 20 25 30 40 50 60
Amp draw 460/3/60 2.6 4.8 7.6 11 14 21 27 34 40 52 65 77
Shipping weight (lbs.) • P1
— 95 115 125 165 180 300 310 400 465 710 730
• P2
60 90 115 275 320 425 510 630 670 — — —
Trim size (inches) 2 2½ 3 4 6 8
Maximum flow (gpm) 50 90 160 320 900 2,000
Shipping weight (lbs.) 25 35 50 75 120 165
Metric Standards
Capacity Trim Process Recirculating
Nominal refrigeration Nominal flow size pump pump
Tower water, Kcal/hr liters mm Dia. hp kW hp kW
75,600 227 64 5 3.73 3 2.24
113,400 341 64 7½ 5.59 3 2.24
151,200 454 76 7½ 5.59 5 3.73
189,000 568 76 10 7.50 5 3.73
226,800 682 102 10 7.50 5 3.73
283,500 852 102 15 11.19 7½ 5.59
302,400 909 102 15 11.19 7½ 5.59
378,000 1,135 102 20 14.91 7½ 5.59
472,500 1,419 152 20 14.91 10 7.50
567,000 1,703 152 25 18.64 10 7.50
661,500 1,987 152 30 22.37 15 11.19
756,000 2,271 152 30 22.37 15 11.19
945,000 2,839 152 40 29.93 20 14.91
1,134,000 3,406 152 50 37.29 20 14.91
Pump
horsepower/kW
1½/1.12 3/2.24 5/3.73 7½/5.59 10/7.5 15/11.19 20/14.91 25/18.64 30/22.37 40/29.93 50/37.29 60/44.7
4
Amp draw 460/3/60 2.6 4.8 7.6 11 14 21 27 34 40 52 65 77
Ship weight (Kg) • P1
— 44 53 57 75 82 137 141 182 211 323 332
• P2
28 41 53 125 146 193 232 286 304 — — —
Trim size (inches) 2 2½ 3 4 6 8
Maximum flow (lpm) 189 340 624 1,211 3,406 7,570
Shipping weight (Kg) 12 16 23 35 55 75