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CIRCULAR SIGHTGLASSES Series NW-BW, NW-FT, NW-RF0 pages
2 7/8˝
(73 mm)
2 3/8˝
(60 mm)
4˝
CIRCULAR SIGHTGLASSES
MAX LEVEL
(102mm)
Series NW-BW, NW-FT, NW-RF
EVEL
Series NW-BW, NW-FT, and NW-RF
This series of sightglasses is designed for attachment to stub end pipe, ANSI flanged
nozzles or vessel studding outlets. Each is rated for 150 PSIG (10.3 Barg) at 300°F
(149°C) with a tempered soda lime lens and 500°F (260°C) with a borosilicate lens.
Sightglasses are constructed using code materials. Optional accessories include Series
PL, MSL, SLEX, REX, FBX illuminators, and Type I wipers.
L
1 1/16˝
Series
(27mm) NW-BW
Buttweld Connection
EVEL
MIN LEVEL
3˝ CLASS
150 R.F.
FLANGE
B
C
1 13/16˝
Inches
MM
Inches
MM
(46mm)
4
108
3
83
5 MAX LEVEL 95
127
3
L
Size
A
Inches
MM
1
25
15/8
41
2
51
6
3
76
1/2
4
102
9
1˝
B
C
11/2˝
2˝
3˝
7 7/8˝
5˝
(200mm)
6˝
4˝
A
ASS
.F. Series NW-FT Female
-2PLSThreaded Connection
6˝
(152mm)
1/4
7 1/8˝
(181mm)
7 1/2˝
A
(191mm)
3
APPROX. WEIGHT
LBS
KGS
152
6
3/4
7
1/4
9
4
102
13
6
191
11/16
4
4
119
23
10
229
415/16
125
34
15
1/2
5
8˝
127
10
254
7
191
39
18
6
152
11
279
85/8
219
48
22
75
L
34
8
Size
203
1/2
13
MIN LEVEL279
343
11
A
B
C
APPROX. WEIGHT
A
6
60
2
152
2
64
12
31/2
89
7 1/2
191
31/8
79
18
8
4˝
C
2˝
3˝
B
1˝ (25mm)
2
Bottom o
3
tank
5
1/2
229
1/4
83
30
14
1/4
Inches
1˝
1 ˝
1/2
MM
Inches
15/16
33
41/4
7/8
1
48
4
MM
MM
2 7/8˝ 44
1
127
2 mm)
56
(73
LBS
3/4
5
3/16
7
108
5
1/2
114
Inches
9
3/8
3
KGS
5˝
5
9/16
141
10
254
4
108
38
17
6˝
6 5/8
168
11
279
41/16
103
45
20
121
70
32
Length of indication (L) Plus 9.625˝
Series NW-RF
Submerged float length
Flanged Connection
8˝
203
8
Size
13
1/2
A
343
3/4
4
B
C
APPROX. WEIGHT
Inches
1˝
B
C
MM
Inches
MM
Inches
MM
LBS
KGS
15/16
33
41/4
108
111/16
43
4
2
1/16
1 ˝
7/8
1
48
5
127
2
52
7
3
2˝
2 3/8
60
6
152
2 5/16
59
11
5
3˝
1/2
89
1/2
191
2
3/4
70
19
9
3/4
1/2
A
3
1/2
7
4˝
4
114
9
229
2
70
26
12
5˝
5 9/16
141
10
254
27/8
73
32
15
6˝
6 5/8
168
11
279
27/8
73
35
16
8˝
8
203
131/2
343
3 9/16
90
60
27
*Dimension C contains the thickness of a standard heavy hexagon nut.
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SIGHTGLASSES
6˝
m)
(27mm)
5
"
