Service & Installation - Gas Equipment Company, Inc.

Orifices & Plugs
Plug Orifices
Part #
Thread
Size
PO-501
16 x 36
Application
Kennedy Room Heater, #10
Garland Water Heater, Vulcan
Range-Plate & Water Heater,
Rober Range-old type, Reliable
Range, Eclipse, Estate, Quality,
& Ideal
PO-507
1
/4". x 28
Used for many applications
PO-508
1
/4"
x 28
PO-511
7
/ 6"
x 2
1
PO-518
1 7
1
/ 32"
x 32
PO-519
1
/8"
PO-525
1
/4"
C r e s c e n t R a n g e & P l a t e ,
Griswold Plate, Clark Jewel,
Water Heater, Lorain Plate,
Quick Metal Plate, Reliable
Range & Plate, and others.
Golden Glow Heater, Welsbach
Heaters, Rex Water Heater,
Bryant Boilers,
PO-527
5
/ 16" x 32
Electrolux & Servel refrigerators
PO-529
5
/ 6"
x 2
1 7
PO-530
5
/ 6"
x 2
1 4
PO-536
3
/8"
x 27
PO-538
3
/8"
x 32
PO-543
7
/ 6"
x 2
1 4
PO-557
9
/ 6"
x 1
1 8
Cap Orifices
Part #
Thread
Size
Hex
Size
CO-400
3 /8" x 27
1 /2"
3
CO-406
3 /8" x 27
1 /2"
3
CO-407
Bored
3 /8"
x 27
—
—
—
—
—
—
—
—
—
Length
2 / 32"
1 / 16"
1 /2" 1 5/ 16"
CO-400
CO-407
PO-501
PO-508
PO-518
PO-525
PO-529
PO-536
PO-543
CO-406
PO-507
PO-511
PO-519
PO-527
PO-530
PO-538
PO-557
LPG & Natural Gas Flow Through
Fixed Orifices*
Orifice or
Propane
Drill Size
. 008 519
. 009 656
. 010 812
. 011 981
Natural Gas
(3.5" w.c.)
—
—
—
—
. 012 1,169
—
80 1,480
520
79
1,708
590
78
2,080
760
77
2,629
950
76
3,249
1,130
75
3,581
1,250
74
4,119
1,440
73
4,678
1,630
72
5,081
1,770
71
5,496
1,970
70
6,375
2,220
69
6,934
2,430
68
7,813
2,720
67
8,320
2,910
66
8,848
3,090
65 9,955
3,390
64
10,535
3,680
63
11,125
3,920
62
11,735
4,080
61
12,367
4,340
60
13,008
4,550
59
13,660
4,760
58
14,333
5,030
57
15,026
5,230
56
17,572
6,130
55
21,939
7,680
54
24,630
8,590
53
28,769
10,040
52
32,805
1 1,4 60
Orifice or
Natural Gas
Propane
Drill Size
(3.5" w.c.)
51
36,531
12,770
50
39,842
13,920
49
43,361
15,200
48
46,983
16,360
47
50,088
17,520
46
53,296
18,570
45
54,641
19,150
44
60,229
21,010
43
64,369
22,390
42
71,095
24,950
41
74,924
25,980
40
78,029
27,030
39
80,513
28,200
38
83,721
29,250
37
87,860
30,630
36
92,207
32,140
35
98,312
34,950
34
100,175
35,050
33
103,797
36,080
32
109,385
38,300
31
117,043
40,850
30
134,119
46,870
29
150,366
52,330
28
160,301
55,920
27
168,580
58,830
26
175,617
61,270
25
181,619
63,580
24
187,828
65,670
23
192,796
67,070
22
200,350
70,080
21
205,525
71,830
20
210,699
73,680
19
223,945
77,980
18
233,466
8 1,5 70
Calculation based on:
Natural = 1,000 BTU Gas, 0.60 Spec Gr
LP = 2,516 BTU Gas, 1.52 Spec Gr
Approximate sizes based on avg. data for all orifice types.
* Refer to NFPA pamphlet 54 for more information.
Manifold Plug
Part #
Taper
Pipe Thread
PO-523
1 /8"
244