37
Table 12. High Altitude Deration Chart for Natural Gas - High Heating Value
NATURAL GAS - HIGH HEATING VALUE
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
38,000
54,000
72,000
90,000
108,000
120,000
0 to 1,999 FT
45
47
47
47
47
47
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
2,000 to 2,999 FT
45
47
47
47
47
47
ORIFICE SIZE
3.0
3.2
3.2
3.2
3.2
3.2
MANIFOLD PRESSURE
3,000 to 3,999 FT
45
47
47
47
47
47
ORIFICE SIZE
2.8
3.0
3.0
3.0
3.0
3.0
MANIFOLD PRESSURE
4,000 to 4,999 FT
45
47
47
47
47
47
ORIFICE SIZE
2.7
2.8
2.8
2.8
2.8
2.8
MANIFOLD PRESSURE
5,000 to 5,999 FT
45
47
47
47
47
47
ORIFICE SIZE
2.5
2.7
2.7
2.7
2.7
2.7
MANIFOLD PRESSURE
6,000 to 6,999 FT
49
49
49
49
49
49
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
7,000 to 7,999 FT
49
49
49
49
49
49
ORIFICE SIZE
3.4
3.3
3.3
3.3
3.3
3.3
MANIFOLD PRESSURE
8,000 to 8,999 FT
49
49
49
49
49
49
ORIFICE SIZE
3.2
3.0
3.0
3.0
3.0
3.0
MANIFOLD PRESSURE
9,000 to 9,999 FT
49
49
49
49
49
49
ORIFICE SIZE
3.0
2.8
2.8
2.8
2.8
2.8
MANIFOLD PRESSURE
NATURAL GAS - LOW HEATING VALUE
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
38,000
54,000
72,000
90,000
108,000
120,000
0 to 1,999 FT
45
47
47
47
47
47
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
2,000 to 2,999 FT
45
47
47
47
47
47
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
3,000 to 3,999 FT
45
47
47
47
47
47
ORIFICE SIZE
3.1
3.3
3.3
3.3
3.3
3.3
MANIFOLD PRESSURE
4,000 to 4,999 FT
45
47
47
47
47
47
ORIFICE SIZE
2.9
3.1
3.1
3.1
3.1
3.1
MANIFOLD PRESSURE
5,000 to 5,999 FT
45
47
47
47
47
47
ORIFICE SIZE
2.8
2.9
2.9
2.9
2.9
2.9
MANIFOLD PRESSURE
6,000 to 6,999 FT
45
47
47
47
47
47
ORIFICE SIZE
2.6
2.8
2.8
2.8
2.8
2.8
MANIFOLD PRESSURE
7,000 to 7,999 FT
48
49
49
49
49
49
ORIFICE SIZE
3.3
3.4
3.4
3.4
3.4
3.4
MANIFOLD PRESSURE
8,000 to 8,999 FT
48
49
49
49
49
49
ORIFICE SIZE
3.0
3.2
3.2
3.2
3.2
3.2
MANIFOLD PRESSURE
9,000 to 9,999 FT
48
49
49
49
49
49
ORIFICE SIZE
2.8
2.9
2.9
2.9
2.9
2.9
MANIFOLD PRESSURE
Table 13. High Altitude Deration Chart for Natural Gas - Low Heating Value
