45
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%/1,000 FT ABOVE SEA LEVEL) (CONT)
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
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
A97386
58UVB