All Categories > Sight Glasses > Circular Sight Glasses > Weld Pad Style Circular Sight Glasses > Item # NW80  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites

Item # NW80, NW Series Circular Sight Glasses



Series NW weld pad connection.

Series NW80 4" Diameter view weld pad style sight glasses are offered 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. ASME code calculations and any resulting additional material needed to reinforce sight glass opening to meet ASME code is the responsibility of the buyer.





Specifications  · Additional Description

Specifications

Size

80 mm

View Diameter (Dimension A)

4 in
102
mm

Overall Diameter (Dimension B)

7 1/2 in
191
mm

Lens Retainer Thickness (Dimension C)

3/4 in
19
mm

Lower Flange Thickness (Dimension D)

1 3/16 in
30
mm

Approximate Weight

19 lb
9
kg

Rated Pressure at 300 ºF (149 ºC) Temperature

150 psig
10.3
Barg

Mounting Style

Flange

Lower Flange Shape

Curved Cylindrically
Spherically

Seal Gasket Material

EPDM
Neoprene

PTFE

Silicone Rubber

Viton®

Lens Material

Tempered Soda Lime
Tempered Borosilicate

Quartz

Vycor™

BoroAlloy™

Accessories

Type I Spray Washer
Type I Wiper

Type II Spray Washer Assemblies

Type II Wiper

Lower Flange Material

Carbon Steel
Stainless Steel

Shape

Circular

Special Features

Schematic Diagram of Curved Sight Glasses
NW50-R, Curved Sight Glasses
Double Window Sight Glasses
NW50-DW, Double Window Sight Glasses


Additional Description
  • Lower flanges constructed of carbon steel and stainless steel are standard. Virtually any machinable alloy can be specified to meet user requirements.
  • Sizes NW50, NW80, NW100, and NW125 have standard ratings of 150 PSIG (10.3 Barg) pressure and full vacuum at 300 ºF (149 ºC) temperature. NW150 and NW200 are rated standard for 125 PSIG (8.6 Barg) pressure and full vacuum at 300 ºF (149 ºC) temperature. Higher pressure and temperature ratings are available upon request.
  • The Papailias Co. sight glass lens is tempered soda lime for operating temperatures up to 300 ºF (149 ºC) standard. Tempered borosilicate lens material is available for operating temperatures up to 500 ºF (260 ºC). Lenses of quartz, Vycor®, and BoroAlloy™ are also available for higher temperatures.
  • The standard sight glass seal gasket is neoprene. PTFE, Viton®, EPDM, and silicon rubber seal gaskets are also available from stock. Virtually any elastomeric material may be specified to meet operating conditions.
  • The lower flange can be supplied thicker if required to reinforce the vessel opening in accordance with ASME Section VIII requirements.
  • The lower flange can be provided curved cylindrically or spherically to match the vessel geometry.




 DOWNLOADS 

Data Sheet
(PDF, 333KB)

IOM Manual
(PDF, 182KB)

NW80
(PDF, 264KB)