TABLE 9—MODEL 351DAS ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT
Continued
FOR USE WITH 080 SIZE FURNACES USING NATURAL GAS
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2 PERCENT FOR EACH 1000 FT ABOVE SEA LEVEL)
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
725
43
3.7
43
3.8
42
3.2
42
3.3
42
3.4
750
43
3.4
43
3.5
43
3.7
43
3.8
42
3.2
775
44
3.7
44
3.8
43
3.4
43
3.5
43
3.7
4001
800
44
3.5
44
3.6
44
3.7
44
3.8
43
3.4
825
44
3.2
44
3.4
44
3.5
44
3.6
44
3.7
to
850
45
3.7
45
3.8
44
3.3
44
3.4
44
3.5
875
45
3.5
45
3.6
45
3.7
44
3.2
44
3.3
5000
900
45
3.3
45
3.4
45
3.5
45
3.6
45
3.8
925
45
3.1
45
3.2
45
3.3
45
3.4
45
3.6
950
45
3.0
45
3.1
45
3.2
45
3.3
45
3.4
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
700
43
3.6
43
3.7
42
3.2
42
3.3
42
3.4
725
43
3.4
43
3.5
43
3.6
43
3.7
43
3.8
750
44
3.6
44
3.7
43
3.4
43
3.5
43
3.6
775
44
3.4
44
3.5
44
3.6
44
3.7
43
3.4
5001
800
44
3.2
44
3.3
44
3.4
44
3.5
44
3.6
825
45
3.6
45
3.7
44
3.2
44
3.3
44
3.4
to
850
45
3.4
45
3.5
45
3.6
45
3.8
44
3.2
875
45
3.2
45
3.3
45
3.4
45
3.6
45
3.7
6000
900
45
3.0
45
3.1
45
3.3
45
3.4
45
3.5
925
45
2.9
45
3.0
45
3.1
45
3.2
45
3.3
950
45
2.7
45
2.8
45
2.9
45
3.0
45
3.1
975
45
2.6
45
2.7
45
2.8
45
2.9
45
2.9
1000
45
2.5
45
2.5
45
2.6
45
2.7
45
2.8
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58
0.60
0.62
0.64
0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
650
42
3.2
42
3.3
42
3.4
42
3.5
42
3.6
675
43
3.6
43
3.7
43
3.8
42
3.2
42
3.3
700
44
3.8
43
3.4
43
3.6
43
3.7
43
3.8
6001
725
44
3.6
44
3.7
44
3.8
43
3.4
43
3.5
750
44
3.3
44
3.4
44
3.6
44
3.7
44
3.8
to
775
45
3.8
44
3.2
44
3.3
44
3.4
44
3.5
800
45
3.5
45
3.7
45
3.8
44
3.2
44
3.3
7000
825
45
3.3
45
3.4
45
3.6
45
3.7
45
3.8
850
45
3.1
45
3.2
45
3.4
45
3.5
45
3.6
875
45
3.0
45
3.1
45
3.2
45
3.3
45
3.4
—25—
Содержание 351DAS
Страница 35: ...35...