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CIRCULAR SIGHTGLASSES Series NW0 pages
2 7/8˝
(73 mm)
(27mm)
2 3/8˝
(60 mm)
4˝
CIRCULAR SIGHTGLASSES
MAX LEVEL
(102mm)
Series NW
EVEL
L
SPECIFICATIONS
6˝
m)
q Lower
MIN LEVEL flanges constructed of carbon
steel and stainless steel are standard. 1/8˝
7
machinable alloy can be
3˝ CLASS Virtually any meet user requirements.
specified to
(181mm)
150 R.F. q Sizes NW50, NW80, NW100, and
FLANGE NW125 have standard ratings of 150
PSIG (10.3 Barg) pressure and full
vacuum at 300°F (149°C) temperature.
NW150 and NW200
1 13/16˝ (8.6 Barg)are rated standard
7 1/2˝
A
for 125 PSIG
pressure
(46mm)vacuum at 300°F(191mm)
and full
(149°C)
temperature. Higher pressure and
temperature ratings
MAX LEVELrequest. are available
upon
L
1 1/16˝
(27mm)
EVEL
7 7/8˝
(200mm)
C
q The standard sightglass seal
gasket is neoprene. Teflon®, Viton®,
EPDM, and silicon rubber seal
gaskets are also available from
stock. Virtually any elastomeric
material may be specified to meet
operating conditions.
2 7/8˝
(73 mm)
D
B
SERIES NW WELD PAD CONNECTION
Series NW sightglasses are offered with nominal viewing diameters of 3", 4", 5", 6", 7",
and 9". Other sizes are available upon request. Series NW sightglasses are manufactured from ASME Section VIII acceptable metals. Each sightglass 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
sightglasses are also available with Series PL, MSL, SLEX, REX, or FBX illuminators.
q The lower flange can be supplied
thicker if required to reinforce the
vessel opening in accordance with
ASME Section VIII requirements.
q The lower flange can be provided
curved cylindrically or spherically
to match the vessel geometry.
See page 7 for more details.
Length of indication (L) Plus 9.625˝
Submerged float length
A
Inches
MM
Inches
C
MM
Inches
APPROX.
WEIGHT
D
MM
Inches
MM
LBS
3/16
KGS
83
7
178
3/4
19
1
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
7/8
279
3/4
19
1
7/16
37
37
17
343
13/16
1
7/16
37
55
25
NW50
NW200
3
6
8
1/4
B
13/16
175
224
11
13
1/2
21
Come visit us online at www.papailias.com
1˝ (25mm)
Bottom o
tank
SIGHTGLASSES
ASS
.F.
-2PLS
Size
L
MIN LEVEL
A
6˝
(152mm)
q The Papailias Co. sightglass lens is
tempered soda lime for operating
temperatures up to 300°F (149°C)
standard. Tempered borosilicate
lens material is available for
operating temperatures up to
500°F (260°C). Lenses of quartz,
Vycor®, and BoroAlloy™ are also
available for higher temperatures.
3
"
