Fig. 48.—Pump operated by belt.
Fig. 49.—Duplex pump, operated directly by steam.
TABLE XIV
| Size of Pipes for Short Lengths To be increased as Length Increases | Approximate Space Occupied Feet and Inches | ||||||||||
| Diameter of Steam Cylinders | Diameter of Water Pistons | Length of Stroke | Gallons per Revolution | Revolutions per Minute | Gallons per Minute | Steam Pipe | Exhaust Pipe | Suction Pipe | Delivery Pipe | Length | Width |
| 3 | 3/4 | 3 | 0.019 | 80 | 1.5 | 3/8 | 1/2 | 1-1/4 | 1 | 2 9 | 1 0 |
| 3 | 1 | 3 | 0.033 | 80 | 2.6 | 3/8 | 1/2 | 1-1/4 | 1 | 2 9 | 1 1 |
| 4-1/2 | 1 | 4 | 0.044 | 75 | 3.6 | 1/2 | 3/4 | 2 | 1-1/2 | 2 10 | 1 1 |
| 4-1/2 | 1-1/4 | 4 | 0.064 | 75 | 4.8 | 1/2 | 3/4 | 2 | 1-1/2 | 2 10 | 1 1 |
| 5-1/4 | 1-1/4 | 5 | 0.08 | 70 | 5.6 | 3/4 | 1-1/4 | 1-1/2 | 1 | 3 1 | 1 4 |
| 5-1/4 | 1-3/4 | 5 | 0.18 | 70 | 12.7 | 3/4 | 1-1/4 | 1-1/2 | 1 | 3 1 | 1 4 |
| 6 | 1-3/4 | 6 | 0.22 | 65 | 14.0 | 1 | 1-1/4 | 1-1/2 | 1 | 3 5 | 1 5 |
| 6 | 2 | 6 | 0.29 | 65 | 19.0 | 1 | 1-1/4 | 1-1/2 | 1 | 3 5 | 1 5 |
| 6 | 2-1/4 | 6 | 0.38 | 65 | 25.0 | 1 | 1-1/4 | 1-1/2 | 1 | 3 5 | 1 5 |
| 7-1/2 | 2-1/2 | 6 | 0.38 | 65 | 25.0 | 1-1/2 | 2 | 4 | 3 | 3 6 | 1 6 |
| 6 | 2-1/2 | 6 | 0.48 | 65 | 31.0 | 1 | 1-1/4 | 1-1/2 | 1 | 3 5 | 1 5 |
| 7-1/2 | 2-1/2 | 6 | 0.048 | 65 | 31.0 | 1-1/2 | 2 | 4 | 3 | 3 6 | 1 9 |
| 7-1/2 | 2-3/4 | 6 | 0.056 | 65 | 36.0 | 1-1/2 | 2 | 4 | 3 | 3 7 | 1 9 |
| 9 | 2-3/4 | 6 | 0.056 | 65 | 36.0 | 1-1/2 | 2 | 4 | 3 | 3 8 | 1 11 |
| 9 | 3-1/2 | 6 | 0.079 | 65 | 51.0 | 1-1/2 | 2 | 4 | 3 | 3 9 | 1 11 |
Fig. 50.—Raising water by means of compressed air.
Figure 49 shows a cut of a small duplex Worthington pump which operates by steam, not requiring any intermediate engine. To show the variety of pumps made and the way in which the proportions vary with the capacity of the pumps, the preceding table is given of pumps of small capacity designed to work with low steam pressure.