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Table 10—Orifice Size* And Manifold Pressure For Gas Input Rate (Continued)
(Tabulated Data Based On 22,000 Btuh Per Burner, Derated 4 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
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A. Only
9001
to
10,000
600 43 2.7 43 2.8 43 2.9 43 3.0
625 43 2.5 43 2.6 43 2.6 43 2.7
650 43 2.3 43 2.4 43 2.4 43 2.5
675 43 2.1 43 2.2 43 2.3 43 2.3
700 48 3.7 43 2.0 43 2.1 43 2.2
725 48 3.5 48 3.6 48 3.7 43 2.0
* Orifice numbers 43 are factory installed
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