NATIONAL STANDARD PUMP SIZES.
| Pump Sizes. | Ratio of Piston Areas. | Capacity At 100 lbs. at Pump. | ||||
|---|---|---|---|---|---|---|
| Steam. | Water. | Stroke. | About | Number of 11⁄8 in. Streams. | Nominal Gals. per Minute. | Actual Gals. per Min. as per Art. 4. |
| 14 × 7 × 12 | 4 to 1 | Two | 500 | 4830 | ||
| 14 × 71⁄4 × 12 | 520 | |||||
| 16 × 9 × 12 | 3 to 1 | Three | 750 | 8060 | ||
| 18 × 20 × 12 | 3 to 1 | Four | 1000 | 9990 | ||
| 181⁄2 × 101⁄4 × 12 | 1050 | |||||
| 20 × 12 × 16 | 23⁄4 to 1 | Six | 1500 | 1655 | ||
NATIONAL STANDARD PUMP SIZES.(continuation)
| Pump Sizes. | [B] Boiler Power Required | Full Speed. | ||||
|---|---|---|---|---|---|---|
| Steam. | Water. | Stroke. | Horse Power. | Steam Pres. at Pump, lbs. | Rev. Per Minute. | Piston Travel Feet Per Minute. |
| 14 × 7 × 12 | 100 | 40 | 70 | 140 | ||
| 14 × 71⁄4 × 12 | ||||||
| 16 × 9 × 12 | 115 | 45 | 70 | 140 | ||
| 18 × 20 × 12 | 150 | 45 | 70 | 140 | ||
| 181⁄2 × 101⁄4 × 12 | ||||||
| 20 × 12 × 16 | 200 | 50 | 60 | 160 | ||