Calculating Available Power
Nozzle Selection Chart
Nozzles Size: for multiple-nozzle machines, multiply flow by number of nozzles
The Watermotor Model 90 uses nozzles up to 1/2" dia. (12.7 mm)
and the Model 150 up to 7/8" (22.2 mm).
| U.S. units | Model 90 | Model 150 | Model 90 | Model 150 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Noozle Diameter | 5/16" | 3/8" | 7/16" | 1/2" | 5/8" | 3/4" | 7/8" | |||
| Net Fall (feet) |
Pressure (PSI) |
Flow (gallons per minute) |
Rate of Revolution (RPM) |
|||||||
| 30 | 13.0 | 10.5 | 15.1 | 20.6 | 26.9 | 42.0 | 60.5 | 82.4 | 1303 | 752 |
| 40 | 17.3 | 12.1 | 17.5 | 23.8 | 31.1 | 48.5 | 69.9 | 95.1 | 1497 | 865 |
| 50 | 21.7 | 13.6 | 19.5 | 26.6 | 34.7 | 54.3 | 78.1 | 106.0 | 1680 | 970 |
| 60 | 26.0 | 14.8 | 21.4 | 29.1 | 38.0 | 59.4 | 85.6 | 117.0 | 1829 | 1056 |
| 80 | 34.6 | 17.1 | 24.7 | 33.6 | 43.9 | 68.6 | 98.8 | 135.0 | 2115 | 1221 |
| 100 | 43.3 | 19.2 | 27.6 | 37.6 | 49.1 | 76.7 | 110.0 | 150.0 | 2366 | 1366 |
| 120 | 52.0 | 21.0 | 30.3 | 41.2 | 53.8 | 84.1 | 121.0 | 165.0 | 2595 | 1498 |
| 150 | 65.0 | 23.5 | 33.8 | 46.0 | 60.1 | 93.9 | 135.0 | 184.0 | 2903 | 1676 |
| 200 | 86.6 | 27.1 | 39.1 | 53.2 | 69.4 | 109.0 | 156.0 | 213.0 | 3349 | 1934 |
| 250 | 108.0 | 30.3 | 43.6 | 59.4 | 77.6 | 121.0 | 175.0 | 261.0 | 3738 | 2158 |
| 300 | 130.0 | 33.2 | 47.8 | 65.1 | 85.1 | 133.0 | 191.0 | 283.0 | 4103 | 2369 |
| Metric System | Model 90 | Model 150 | Model 90 | Model 150 | ||||||
| Noozle Diameter | 7.9 mm | 9.5 mm | 11.1 mm | 12.7 mm | 15.9 mm | 19.0 mm | 22.2 mm | |||
| Net Fall (meters) |
Pressure (kg/cm2) |
Flow (litres per minute) |
Rate of Revolution (RPM) |
|||||||
| 9.2 | 0.90 | 39.8 | 57.2 | 78.1 | 102.0 | 159.2 | 229.3 | 312.3 | 1303 | 752 |
| 12.2 | 1.19 | 45.9 | 66.3 | 90.2 | 117.9 | 183.8 | 264.9 | 360.4 | 1497 | 865 |
| 15.2 | 1.50 | 51.5 | 73.9 | 100.8 | 131.5 | 205.8 | 296.0 | 401.7 | 1680 | 970 |
| 18.3 | 1.79 | 56.1 | 81.1 | 110.3 | 144.0 | 225.1 | 324.4 | 443.4 | 1829 | 1056 |
| 24.4 | 2.38 | 64.8 | 93.6 | 127.3 | 166.4 | 260.0 | 374.4 | 511.6 | 2115 | 1221 |
| 30.5 | 2.98 | 72.8 | 104.6 | 142.5 | 186.1 | 290.7 | 420.7 | 568.5 | 2366 | 1366 |
| 36.6 | 3.58 | 79.6 | 114.8 | 156.1 | 203.9 | 318.7 | 458.5 | 625.4 | 2595 | 1498 |
| 45.8 | 4.48 | 81.9 | 128.1 | 174.3 | 227.8 | 355.9 | 511.6 | 697.4 | 2903 | 1676 |
| 61.0 | 5.97 | 102.7 | 148.2 | 201.6 | 263.0 | 413.1 | 591.2 | 807.3 | 3349 | 1934 |
| 76.2 | 7.44 | 114.8 | 165.2 | 225.1 | 294.1 | 458.6 | 663.2 | 902.0 | 3738 | 2158 |
| 91.5 | 8.96 | 125.8 | 181.2 | 246.7 | 322.5 | 504.1 | 723.9 | 989.2 | 4103 | 2369 |