Table 12-2. Phosphate/polymer performance can be maintained at high heat transfer rates through selection of the appropriate polymer.
| Treatment Type | Boiler Treatment Concentration (ppm) | Heat Transfer Rate (Btu/ft2/hr) | Operating Pressure (psig) | % Scale Reduction |
| Synthetic Polymer A | 10 | 185,000 | 300 | 44 |
| Synthetic Polymer B | 10 | 185,000 | 300 | 93 |
| Synthetic Polymer C | 10 | 185,000 | 300 | 94 |
| Synthetic Polymer B | 5 | 185,000 | 300 | 56 |
| Synthetic Polymer C | 5 | 185,000 | 300 | 94 |
| Synthetic Polymer B | 10 | 185,000 | 900 | 64 |
| Synthetic Polymer C | 10 | 185,000 | 900 | 92 |
| Synthetic Polymer B | 10 | 300,000 | 900 | 44 |
| Synthetic Polymer C | 10 | 300,000 | 900 | 86 |
| Synthetic Polymer B | 10 | 300,000 | 1200 | 30 |
| Synthetic Polymer C | 10 | 240,000 | 1200 | 90 |
| Synthetic Polymer C | 10 | 300,000 | 1200 | 83 |