Adapter Pressure Ratings
| Nominal Bore Dia. | Design Working Pressure | Proof Pressure | Over Pressure | ||||
|---|---|---|---|---|---|---|---|
| mm | ins | BAR | psi | BAR | psi | BAR | psi |
| 5 | 1/8 | 350 | 5145 | 525 | 7718 | 1400 | 20580 |
| 6.3 | 1/4 | 450 | 6500 | 675 | 9750 | 1520 | 22000 |
| 10 | 3/8 | 380 | 5500 | 570 | 8250 | 1310 | 19000 |
| 12.5 | 1/2 | 310 | 4500 | 465 | 6750 | 1100 | 16000 |
| 14.25 | 9/16 | 289 | 4250 | 434 | 6375 | 964 | 14170 |
| 16 | 5/8 | 280 | 4000 | 420 | 6000 | 850 | 12350 |
| 19 | 3/4 | 240 | 3500 | 360 | 5250 | 750 | 11000 |
| 25 | 1 | 210 | 3000 | 315 | 4500 | 675 | 9750 |
| 31.5 | 1-1/4 | 170 | 2500 | 255 | 3750 | 530 | 7700 |
| 37.5 | 1-1/2 | 136 | 2000 | 204 | 3000 | 404 | 5940 |
| 50 | 2 | 136 | 2000 | 204 | 3000 | 404 | 5940 |
| 62.5 | 2-1/2 | 84 | 1240 | 126 | 1860 | 245 | 3596 |
| 75 | 3 | 76 | 1120 | 114 | 1680 | 216 | 3170 |
Design Working Pressure
Recommended pressure rating for adapters manufactured by Burnett & Hillman.