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Item # NW50-DW, Double Window Sight Glasses


The double window assembly offers the user an extra layer of reliability by controlling the factors which cause a lens to fail.

If a lens fails, the cause can, in most instances, be traced to one or a combination of the following factors: a stress concentration, thermal stress or shock, erosion or corrosion, and mechanical damage. The double window design provides extra protection against these causes of failure. All sizes except NW150-DW and NW200-DW are rated standard for 150 PSIG (10.3 Barg) pressure and full vacuum at 300 ºF (149 ºC) temperature. NW150- DW and NW200-DW are rated for 125 PSIG (8.6 Barg) pressure at 300 ºF (149 ºC) temperature. Higher pressure and temperature ratings are available upon request.





Specifications

Size
50 mm

Dimension A
4 3/8 in
111 mm

Dimension B
3 1/4 in
83 mm

Dimension C
1 7/8 in
48 mm

Dimension D
3/8 in
10 mm

Rated Pressure at 300 ºF (149 ºC) Temperature
150 psig
10.3 Barg

Sight Glass Feature
Double Window


 DOWNLOADS 

Guide to Corrosion Resistance
(PDF, 114KB)