Rectangular Sight glasses »
Series RS

The Series RS sight glass is entirely manufactured from rolled bar stock to withstand the severe service requirements found in process vessels and reactors. These sight glasses can be supplied in carbon steel or Type 304, 304L, 316 and 316L stainless steel with plain or reflex glass.

Standard lengths are listed with special sizes available. These sight glasses are recommended for pressures and temperatures up to 150 PSIG (14.3 Barg) and 500 degrees F (260 degrees C).
Size
Length
Width
Viewing Length
Viewing Width
Approx. Weight
Inches
MM
Inches
MM
Inches
MM
Inches
MM
LBS
KGS
RS 1x1
5 1/4
133
3
76
3 3/4
95
5/8
16
13
6
RS 1x2
6 1/4
159
3
76
4 3/4
121
5/8
16
15
7
RS 1x3
7 1/4
184
3
76
5 3/4
146
5/8
16
18
8
RS 1x4
8 1/4
210
3
76
6 3/4
171
5/8
16
18
8
RS 1x5
9 3/8
238
3
76
7 7/8
200
5/8
16
21
10
RS 1x6
10 5/8
270
3
76
9 1/8
232
5/8
16
23
10
RS 1x7
11 3/4
298
3
76
10 1/4
260
5/8
16
26
12
RS 1x8
13 3/8
340
3
76
11 7/8
302
5/8
16
28
13
RS 1x9
14 1/8
359
3
76
12 5/8
321
5/8
16
30
14
RS 2x4
16 1/2
419
3
76
15
381
5/8
16
36
16
RS 2x5
18 3/4
476
3
76
17 1/4
438
5/8
16
42
19
RS 2x6
21 1/4
540
3
76
19 3/4
502
5/8
16
46
21
RS 2x7
23 1/2
597
3
76
22
559
5/8
16
52
24
RS 2x8
26 3/4
679
3
76
25 1/4
641
5/8
16
56
25
RS 2x9
28 1/4
718
3
76
26 3/4
679
5/8
16
60
27
RS 3x6
31 7/8
810
3
76
30 3/8
772
5/8
16
69
31
RS 3x7
35 1/4
895
3
76
33 3/4
857
5/8
16
78
35
RS 3x8
40 1/8
1019
3
76
38 5/8
981
5/8
16
84
38
RS 3x9
42 3/8
1076
3
76
40 7/8
1038
5/8
16
90
41
RS 4x7
47
1194
3
76
45 1/2
1156
5/8
16
104
47
RS 4x8
53 1/2
1359
3
76
52
1321
5/8
16
112
51
RS 4x9
56 1/2
1435
3
76
55
1397
5/8
16
120
55
RS 5x7
58 3/4
1492
3
76
57 1/4
1454
5/8
16
130
59
RS 5x8
66 7/8
1699
3
76
65 3/8
1661
5/8
16
140
64
RS 5x9
70 5/8
1794
3
76
69 1/8
1756
5/8
16
150
68


Series RS-OB

Series RS-OB rectangular obround sight glasses are manufactured from ASME Section VIII acceptable metals. The lower flange can be supplied thicker if required to reinforce the vessel opening or curved to match the vessel's geometry. Standard lengths are listed with special sizes quoted upon request. The Series RS-OB is recommended for pressures up to 150 PSIG (14.3 Barg) and temperatures to 500 degrees F (260 degrees C). Higher temperatures and pressures available.
Size
A
B
C
Weight
Approx.
F
E
D
Inches
MM
Inches
MM
Inches
MM
Inches
MM
Inches
MM
Inches
MM
LBS
KGS
RS-OB 2x12
2
51
12
305
5
127
15
381
1 1/4
32
3/4
19
36
16
RS-OB 2x18
2
51
18
457
5
127
21
533
1 1/4
32
3/4
19
47
21
RS-OB 3x12
3
76
12
305
6
152
16
406
1 1/4
32
7/8
22
47
21
RS-OB 3x18
3
76
18
457
6
152
22
559
1 1/4
32
1
25
58
26
RS-OB 4x12
4
102
12
305
7
178
17
432
1 1/4
32
1
25
58
26
RS-OB 4x18
4
102
18
457
7
178
23
584
1 1/4
32
1
25
70
32

245 Pegasus Ave.
Northvale, NJ 07647
201-767-4027
sales@papailias.com

© Papailias Incorporated, 2006.

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