Douglass

Flanged Connection Tank Sight Glasses

Flanged sight glasses for tanks allow for a total view of the inside of a process. Depending on the fluid temperature and pressure to work with, a recommendation can be made on the best material of manufacture, types of crystals and types of gaskets.

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Flanged sight glasses for tanks allow for a total view of the inside of a process. Depending on the fluid temperature and pressure to work with, a recommendation can be made on the best material of manufacture, types of crystals and types of gaskets.


Body Manufacturing Materials Carbon steel with anti-corrosive coating, stainless steel (304 or 316), brass, polycarbonate, polypropylene
Manufacturing Materials Buna, Neoprene, Teflon, Sanitary Rubber
Seals Sanitary, EPDM, Viton
Glass Manufacturing Material Borosilicate, Fluorosilicate, Quartz, Tempered Glass, Polycarbonate
Type of Connection Free passage
Types of internal vision Flanged
Working pressure From 0 to 300 PSI
working temperature -45°C – 1450°C
ID Visible Diameter A Total Diameter B Minimum thickness C
3” 7.5” (190.50 mm) 4” (101.6 mm) 2” (50.80 mm)
4” 9” (230.00 mm) 6” (152.40 mm) 1.5” (38.1 mm)
5” 10” (255.00 mm) 5” (127.00 mm) 2.5” (63.50 mm)
6” 11” (280.00 mm) 6” (152.40 mm) 3” (76.20 mm)
8” 13.5” (345.00 mm) 8” (203.20 mm) 3.5” (88.90 mm)
10” 16” (405.00 mm) 10” (254.00 mm) 3.5” (88.90 mm)
12” 19” (485.00 mm) 12” (304.80 mm) 3.5” (88.90 mm)

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