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AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS
HEAT VALUE 0.58 0.60 0.62 0.64
AT ALTITUDE Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press
(Btu/cu ft) No. High/Low No. High/Low No. High/Low No. High/Low
TABLE 11 - ORIFICE SIZE* AND MANIFOLD PRESSURES FOR GAS INPUT RATE
(TABULATED DATA BASED ON 20,000 BTUH HIGH-HEAT / 13,000 BTUH LOW-HEAT PER BURNER,
DERATED 2%/1000 FT ABOVE SEA LEVEL)
ALTITUDE
RANGE
(ft)
650 43 3.8 / 1.6 42 3.2 / 1.4 42 3.4 / 1.4 42 3.5 / 1.5
7001 675 43 3.5 / 1.5 43 3.7 / 1.6 43 3.8 / 1.6 42 3.2 / 1.4
700 44 3.8 / 1.6 43 3.4 / 1.4 43 3.5 / 1.5 43 3.6 / 1.5
to 725 44 3.5 / 1.5 44 3.6 / 1.5 44 3.8 / 1.6 43 3.4 / 1.4
750 44 3.3 / 1.4 44 3.4 / 1.4 44 3.5 / 1.5 44 3.6 / 1.5
8000 775 45 3.7 / 1.6 44 3.2 / 1.3 44 3.3 / 1.4 44 3.4 / 1.4
800 45 3.5 / 1.5 45 3.6 / 1.5 45 3.7 / 1.6 44 3.2 / 1.4
825 45 3.3 / 1.4 45 3.4 / 1.4 45 3.5 / 1.5 45 3.6 / 1.5
625 43 3.8 / 1.6 42 3.2 / 1.4 42 3.3 / 1.4 42 3.4 / 1.5
8001 650 43 3.5 / 1.5 43 3.6 / 1.5 43 3.8 / 1.6 42 3.2 / 1.3
675 44 3.7 / 1.6 43 3.4 / 1.4 43 3.5 / 1.5 43 3.6 / 1.5
to 700 44 3.5 / 1.5 44 3.6 / 1.5 44 3.7 / 1.6 44 3.8 / 1.6
725 44 3.2 / 1.4 44 3.4 / 1.4 44 3.5 / 1.5 44 3.6 / 1.5
9000 750 45 3.7 / 1.5 45 3.8 / 1.6 44 3.2 / 1.4 44 3.3 / 1.4
775 45 3.4 / 1.5 45 3.6 / 1.5 45 3.7 / 1.6 45 3.8 / 1.6
600 43 3.8 / 1.6 42 3.2 / 1.4 42 3.3 / 1.4 42 3.4 / 1.4
9001 625 43 3.5 / 1.5 43 3.6 / 1.5 43 3.7 / 1.6 43 3.8 / 1.6
650 44 3.7 / 1.6 44 3.8 / 1.6 43 3.4 / 1.5 43 3.6 / 1.5
to 675 44 3.4 / 1.4 44 3.5 / 1.5 44 3.7 / 1.5 44 3.8 / 1.6
700 44 3.2 / 1.3 44 3.3 / 1.4 44 3.4 / 1.4 44 3.5 / 1.5
10000 725 45 3.6 / 1.5 45 3.7 / 1.6 45 3.8 / 1.6 44 3.3 / 1.4
U.S.A. Only
* Orifice numbers shown inBOLD are factory-installed.
U.S.A. OnlyU.S.A. Only
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