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GENERAL
INFORMATION
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TECHNICAL HELP
GAS
Drill Diameter Natural Gas Drill
Diameter Natural Gas
Size (inches)
(Btu/Hr)
Size
(inches)
(Btu/Hr)
56 .0465
5,359
26
.1470
53,500
54 .0550
7,510
22
.1570
61,100
52 .0635
10,000
18
.1695
71,200
46 .0810
16,250
12
.1890
88,600
42 .0935
21,680
6
.2040
103,200
38 .1015
25,530
2
.2210
121,100
34
.1110
30,550
A
.2340
135,700
31 .1200
35,690
E(
1
/
4
)
.2500
154,900
30 .1285
40,900
Drill Diameter
LP Gas
Drill
Diameter
LP Gas
Size (inches)
(Btu/Hr)
Size
(inches)
(Btu/Hr)
70 .0280
5,490
46
.0810
45,800
67 .0320
7,150
44
.0860
51,600
64 .0360
9,050
42
.0935
61,100
61 .0390
10,600
38
.1015
72,000
58 .0420
12,300
34
.1110
86,200
56 .0465
15,100
30
.1285
115,300
54 .0550
21,200
26
.1470
151,000
52 .0635
28,200
22
.1570
172,000
50 .0700
34,200
18
.1695
200,500
48 .0760
40,400
Table for
Natural Gas
at 3.5
”
W.C. with 1000 Btu/Cu. Ft.,
.65 Specific Gravity and .82 orifice coefficient.
Table for
Propane (lp) Gas
at 11.0
”
W.C. with 2500 Btu/Cu. Ft.,
1.53 Specific Gravity and .80 orifice coefficient.
RATE OF FLOW OF GASES THROUGH ORIFICES
Total Heating Specific
Conversion Factor
Value (Btu/Cu.
Gravity
(multiply listed capacity by:)
Less than 800
0.60
0.516
800 to 950
0.70
0.765
2500 (LP Gas)
1.53
1.620
Capacities shown in this catalog are for AGA Standard Gas
(1000 Btu/Cu. Ft., .64 Specific Gravity) at 1.0”W.C. pressure
drop across valve. Table below shows conversion factors for
other gases.
CONVERSION FACTORS
FOR GAS VALVE CAPACITIES
BTU CONTENT OF FUELS
Natural Gas.................950 to 1,150 Btu/Cu. Ft.
Butane Gas.................3,200 Btu/Cu. Ft.
Propane (LP) Gas.......2,500 Btu/Cu. Ft.
No. 2 Oil......................140,000 Btu/Gallon
ELECTRIC
Voltage (AC – Single Phase)
120
208
240
277
Watts
Amperes
500
4.2
2.4
2.1
1.8
1000
8.3
4.8
4.2
3.6
1500
12.5
7.2
6.3
5.4
2000
16.7
9.6
8.3
7.2
2500
20.9
12.0
10.4
9.0
3000
25.0
14.4
12.5
10.8
3500
29.2
16.8
14.6
12.6
4000
33.3
19.2
16.7
14.4
4500
37.5
21.6
18.8
16.3
5000
41.7
24.0
20.8
18.0
CONVERSION TABLE FOR
WATTS – AMPERES – VOLTS
heat and power equivalents
1 Btu............................252 calories
1 Btu/Hr.......................0.293 watts
1 Watt..........................3.413 Btu/Hr
1 Kw (1000 Watts).......3413 Btu/Hr
1 Hp............................0.746 Kw
PRESSURE CONVERSION TABLE
1
”
Water......................0.0361 lbs/sq. in. or 0.0735 in. Mercury
1
”
Mercury..................13.6 in. water or 0.491 lbs/sq. in.
1 PSI...........................27.7 in. water or 2.036 in. Mercury
Wire
Max. Length Maximum Combined Length
Sizes
(2-Wire Cable)
(2 Single Wires)
No. 18
30 ft.
60 ft.
No. 16
50 ft.
100 ft.
No. 14
80 ft.
160 ft.
Because of the small amount of power available on self-
generating systems, the gas valve may not operate if there
is too much resistance in the circuit. Therefore, choose a
location that does not require any more wire than the recom-
mended lengths shown in the table below.
MAXIMUM WIRE LENGTHS
FOR SELF-GENERATION SYSTEMS
P (Watts)
E (Volts)
I (Amps) =
=
E (Volts)
R (Ohms)
VARIATIONS OF OHMS LAW
E (Volts)
I (Amps)
R (Resistance) =
=
P (Watts)
I2 (Amps)
E (Volts) = I (Amps) x R (Ohms) =
P (Watts)
I (Amps)
P (Watts) = I2 (Amps) x R (Ohms) = I (Amps) x E (Volts)
ELECTRIC AND GAS