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Circular Sight Glasses »
Series NW
Series NW Weld Pad Connection Series NW Sight Glasses are offered with viewing diameters of 3", 4", 5", 6", 7" and 9". Other sizes are available upon request. Series NW sight glasses are manufactured from ASME Section VIII acceptable metals. Each sight glass is thoroughly inspected and will provide long and useful service under the most demanding processing conditions. Optional accessories include Type I wiper, Type II Wiper and Type I spray washer or Type II spray washer assemblies. Series NW sight glasses are also available with Series PL, MSL, SLEX< REX or FBX illuminators.
Specifications
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Lower flanges constructed of carbon steel and stainless steel are standard. Virtually any machinable alloy can be specified to meet user requirements. |
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Sizes NW50, NW80, NW100, and NW 125 have std. ratings of 150 PSIG (10.3 Barg) pressure and full vacuum at 300°F(149°C) temperature. NW150 and NW200 are rated standard for 125 PSIG (8.6 Barg) pressure and full vacuum at 300°F(149°C) temperature ratings are available upon request. |
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The Papailias Co. sight glass lens is tempered soda lime for operating temperatures up to 300°F(149°C) standard. Tempered borosilicate lens material is availble for operating temperatures up to 500°F(260°C). Lenses of quartz and Vycor® are also available for higher temperatures. |
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The standard sight glasses seal gasket is neo-prene, Teflon®, VITON®, EPDM and silicon rubber seal gaskets are also available from stock. Virtually any elastomeric material may be specified to meet operating conditions. |
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The lower flange can be supplied thicker if required to reinforce the vessel opening in accordance with ASME Section VII requirements. |
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The lower flange can be provided curved cylindrically or spherically to match the vessel geometry. See page 7 for more details. |
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| Size |
A
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B
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C
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D
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Approx.
Weight
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| Inches |
MM |
Inches |
MM |
Inches |
MM |
Inches |
MM |
LBS |
KGS |
| NW50 |
3 1/4 |
83 |
7 |
178 |
3/4 |
19 |
1 3/16 |
30 |
18 |
8 |
| NW80 |
4 |
102 |
7 1/2 |
191 |
3/4 |
19 |
1 3/16 |
30 |
19 |
9 |
| NW100 |
5 |
127 |
9 |
229 |
3/4 |
19 |
1 3/16 |
30 |
26 |
12 |
| NW125 |
6 |
152 |
10 |
254 |
3/4 |
19 |
1 7/16 |
37 |
33 |
15 |
| NW150 |
6 7/8 |
175 |
11 |
279 |
3/4 |
19 |
1 7/16 |
37 |
37 |
17 |
| NW200 |
8 13/16 |
224 |
13 1/2 |
343 |
13/16 |
21 |
1 7/16 |
37 |
55 |
25 |
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Series NW-BW, NW-FT and NW-RF
This series of sight glasses is designed for attachment to stub end pipe. ANSI flanged nozzles or vessel studding outlets. Each is rated for 150PSIG (10.3 Barg) at 300°F(149°C) with a tempered soda lime lens at 500°F(260°C) with a borosilicate lens. Sight glasses are constructed using code materials. Optional accessories include Series PL, MSL, SLEX, REX, FBX illuminators and Type I wipers.
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| Series NW-BW Buttweld Connection |
| Size |
A
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B
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C
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Approx.
Weight
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| In. |
MM |
In. |
MM |
In. |
MM |
LBS |
KGS |
| 1" |
1 |
25 |
4 1/4 |
108 |
3 1/4 |
83 |
6 |
3 |
| 1 1/2" |
1 5/8 |
41 |
5 |
127 |
3 3/4 |
95 |
9 |
4 |
| 2" |
2 |
51 |
6 |
152 |
4 |
102 |
13 |
6 |
| 3" |
3 |
76 |
7 1/2 |
191 |
4 11/16 |
119 |
23 |
10 |
| 4" |
4 |
102 |
9 |
226 |
4 15/16 |
125 |
34 |
15 |
| 5" |
5 |
127 |
10 |
254 |
7 1/2 |
191 |
39 |
18 |
| 6" |
6 |
152 |
11 |
279 |
8 5/8 |
219 |
48 |
22 |
| 8" |
8 |
203 |
13 1/2 |
343 |
11 |
279 |
75 |
34 |
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| Series NW-FT Female Threaded Connection |
| Size |
A
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B
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C
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Approx.
Weight
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| In. |
MM |
In. |
MM |
In. |
MM |
LBS |
KGS |
| 1" |
1 5/16 |
33 |
4 1/4 |
108 |
1 1/4 |
44 |
5 |
2 |
| 1 1/2" |
1 7/8 |
48 |
5 |
127 |
2 3/16 |
56 |
7 |
3 |
| 2" |
2 3/8 |
60 |
6 |
152 |
2 3/8 |
64 |
12 |
5 |
| 3" |
3 1/2 |
89 |
7 1/2 |
191 |
3 1/8 |
79 |
18 |
8 |
| 4" |
4 1/2 |
114 |
9 |
226 |
3 1/4 |
83 |
30 |
14 |
| 5" |
5 9/16 |
141 |
10 |
254 |
4 1/4 |
108 |
38 |
17 |
| 6" |
6 5/8 |
168 |
11 |
279 |
4 1/16 |
103 |
45 |
20 |
| 8" |
8 |
203 |
13 1/2 |
343 |
4 3/4 |
121 |
70 |
32 |
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| Series NW-RF Flanged Connection |
| Size |
A
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B
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C
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Approx.
Weight
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| In. |
MM |
In. |
MM |
In. |
MM |
LBS |
KGS |
| 1" |
1 5/16 |
33 |
4 1/4 |
108 |
1 11/16 |
43 |
4 |
2 |
| 1 1/2" |
1 7/8 |
48 |
5 |
127 |
2 1/16 |
52 |
7 |
3 |
| 2" |
2 3/8 |
60 |
6 |
152 |
2 5/16 |
59 |
11 |
5 |
| 3" |
3 1/2 |
89 |
7 1/2 |
191 |
2 3/4 |
70 |
19 |
9 |
| 4" |
4 1/2 |
114 |
9 |
226 |
2 3/4 |
70 |
26 |
12 |
| 5" |
5 9/16 |
141 |
10 |
254 |
2 7/8 |
73 |
32 |
15 |
| 6" |
6 5/8 |
168 |
11 |
279 |
2 7/8 |
73 |
35 |
16 |
| 8" |
8 |
203 |
13 1/2 |
343 |
3 9/16 |
90 |
60 |
27 |
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