TABLE
FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL)
| ALTITUDE | AVG GAS |
|
|
|
|
| SPECIFIC GRAVITY OF NATURAL GAS |
|
|
| |||||||
| HEAT VALUE |
| 0.58 |
| 0.60 |
| 0.62 |
| 0.64 |
| 0.66 | |||||||
|
| RANGE |
|
|
|
|
| |||||||||||
|
| (FT) | AT ALTITUDE | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold |
|
| (BTU/CU FT) |
|
|
|
|
| |||||||||||
|
|
| No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | |
|
|
| 850 | 43 |
| 3.7 | 43 |
| 3.8 | 42 |
| 3.2 | 42 |
| 3.3 | 42 |
| 3.4 |
|
|
| 875 | 43 |
| 3.5 | 43 |
| 3.6 | 43 |
| 3.7 | 43 |
| 3.8 | 42 |
| 3.2 |
Canada |
|
| 900 | 44 |
| 3.7 | 43 |
| 3.4 | 43 |
| 3.5 | 43 |
| 3.6 | 43 |
| 3.7 |
| 0 | 925 | 44 |
| 3.5 | 44 |
| 3.7 | 44 |
| 3.8 | 43 |
| 3.4 | 43 |
| 3.5 | |
|
| 950 | 44 |
| 3.4 | 44 |
| 3.5 | 44 |
| 3.6 | 44 |
| 3.7 | 44 |
| 3.8 | |
and |
| to | 975 | 44 |
| 3.2 | 44 |
| 3.3 | 44 |
| 3.4 | 44 |
| 3.5 | 44 |
| 3.6 |
|
| 1000 | 45 |
| 3.7 | 45 |
| 3.8 | 44 |
| 3.2 | 44 |
| 3.4 | 44 |
| 3.5 | |
U.S.A. |
|
|
|
|
|
|
| |||||||||||
| 2000 | 1025 | 45 |
| 3.5 | 45 |
| 3.6 | 45 |
| 3.7 | 44 |
| 3.2 | 44 |
| 3.3 | |
|
| 1050 | 45 |
| 3.3 | 45 |
| 3.4 | 45 |
| 3.6 | 45 |
| 3.7 | 45 |
| 3.8 | |
|
|
|
|
|
|
|
| |||||||||||
|
| 0% | 1075 | 45 |
| 3.2 | 45 |
| 3.3 | 45 |
| 3.4 | 45 |
| 3.5 | 45 |
| 3.6 |
|
| derate | 1100 | 47 |
| 3.6 | 47 |
| 3.7 | 45 |
| 3.2 | 45 |
| 3.4 | 45 |
| 3.5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
| ALTITUDE | AVG GAS |
|
|
|
|
| SPECIFIC GRAVITY OF NATURAL GAS |
|
|
| |||||||
| HEAT VALUE |
| 0.58 |
| 0.60 |
| 0.62 |
| 0.64 |
| 0.66 | |||||||
|
| RANGE |
|
|
|
|
| |||||||||||
|
| (FT) | AT ALTITUDE | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold |
|
| (BTU/CU FT) |
|
|
|
|
| |||||||||||
|
|
| No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | |
|
| U.S.A. | 775 | 43 |
| 3.8 | 42 |
| 3.2 | 42 |
| 3.3 | 42 |
| 3.4 | 42 |
| 3.5 |
|
| Altitudes | 800 | 43 |
| 3.5 | 43 |
| 3.7 | 43 |
| 3.8 | 42 |
| 3.2 | 42 |
| 3.3 |
Canada |
| 2001 to | 825 | 44 |
| 3.8 | 43 |
| 3.4 | 43 |
| 3.6 | 43 |
| 3.7 | 43 |
| 3.8 |
| 3000 | 850 | 44 |
| 3.6 | 44 |
| 3.7 | 44 |
| 3.8 | 43 |
| 3.5 | 43 |
| 3.6 | |
| or | 875 | 44 |
| 3.4 | 44 |
| 3.5 | 44 |
| 3.6 | 44 |
| 3.7 | 43 |
| 3.4 | |
and |
| Canada | 900 | 44 |
| 3.2 | 44 |
| 3.3 | 44 |
| 3.4 | 44 |
| 3.5 | 44 |
| 3.6 |
| Altitudes | 925 | 45 |
| 3.7 | 45 |
| 3.8 | 44 |
| 3.2 | 44 |
| 3.3 | 44 |
| 3.4 | |
U.S.A. |
|
|
|
|
|
| ||||||||||||
| 2001 to | 950 | 45 |
| 3.5 | 45 |
| 3.6 | 45 |
| 3.7 | 45 |
| 3.8 | 44 |
| 3.3 | |
| 4500 | 975 | 45 |
| 3.3 | 45 |
| 3.4 | 45 |
| 3.5 | 45 |
| 3.6 | 45 |
| 3.8 | |
|
|
|
|
|
|
| ||||||||||||
|
| 5% | 1000 | 45 |
| 3.1 | 45 |
| 3.2 | 45 |
| 3.4 | 45 |
| 3.5 | 45 |
| 3.6 |
|
| derate | 1025 | 45 |
| 3.0 | 45 |
| 3.1 | 45 |
| 3.2 | 45 |
| 3.3 | 45 |
| 3.4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
| ALTITUDE | AVG GAS |
|
|
|
|
| SPECIFIC GRAVITY OF NATURAL GAS |
|
|
| |||||||
| HEAT VALUE |
| 0.58 |
| 0.60 |
| 0.62 |
| 0.64 |
| 0.66 | |||||||
|
| RANGE |
|
|
|
|
| |||||||||||
|
| (FT) | AT ALTITUDE | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold | Orifice |
| Manifold |
|
| (BTU/CU FT) |
|
|
|
|
| |||||||||||
|
|
| No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | No. |
| Pressure | |
|
|
| 750 | 43 |
| 3.7 | 43 |
| 3.8 | 42 |
| 3.3 | 42 |
| 3.4 | 42 |
| 3.5 |
|
|
| 775 | 43 |
| 3.5 | 43 |
| 3.6 | 43 |
| 3.7 | 43 |
| 3.8 | 42 |
| 3.2 |
|
|
| 800 | 44 |
| 3.7 | 43 |
| 3.4 | 43 |
| 3.5 | 43 |
| 3.6 | 43 |
| 3.7 |
Only |
| 3001 | 825 | 44 |
| 3.5 | 44 |
| 3.6 | 44 |
| 3.8 | 43 |
| 3.4 | 43 |
| 3.5 |
|
| 850 | 44 |
| 3.3 | 44 |
| 3.4 | 44 |
| 3.5 | 44 |
| 3.7 | 44 |
| 3.8 | |
U.S.A. |
| to | 875 | 45 |
| 3.8 | 44 |
| 3.2 | 44 |
| 3.3 | 44 |
| 3.5 | 44 |
| 3.6 |
|
| 900 | 45 |
| 3.6 | 45 |
| 3.7 | 45 |
| 3.8 | 44 |
| 3.3 | 44 |
| 3.4 | |
| 4000 | 925 | 45 |
| 3.4 | 45 |
| 3.5 | 45 |
| 3.6 | 45 |
| 3.7 | 44 |
| 3.2 | |
|
|
|
|
|
|
| ||||||||||||
|
|
| 950 | 45 |
| 3.2 | 45 |
| 3.3 | 45 |
| 3.4 | 45 |
| 3.5 | 45 |
| 3.7 |
|
| 7% | 975 | 45 |
| 3.0 | 45 |
| 3.2 | 45 |
| 3.3 | 45 |
| 3.4 | 45 |
| 3.5 |
|
| derate | 1000 | 45 |
| 2.9 | 45 |
| 3.0 | 45 |
| 3.1 | 45 |
| 3.2 | 45 |
| 3.3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
*Orifice numbers shown in BOLD are factory installed.
Percents of derate are based on midpoints of U.S. altitude ranges.