320 Round tank Sight Glass PN16 For welding, according to DIN 28120

Round Sight Glass
PN 16
For welding, according to DIN 28120

Observation and illumination of the interior of enclosed vessels (cauldrons, tanks, silos etc.).
Sight glasses consist of round flange mountings to be welded into or onto a vessel, completed by a sight glass plate with appropriate seals.

Show all product specifications

flange: 1.4571, 1.4541, 1.4404, 1.4539, H II
glass: Borosilicate glass DIN 7080, Soda lime glass DIN 8902
seal: C4400, PTFE, Graphite or according to spec.
screws: A4-70

Other materials on request

Installation guideline:
After welding the base flange onto/into the pressure vessel, the sealing surface must be checked for deformations! Reworking may be required!

The operating pressure does not apply to the base flange. The base flange must be audited together with the pressure vessel according to AD 2000 instructions B9 or an equivalent standard!

a) Wiper
b) Spray Nozzle
c) Double layered glass
d) Double layered glass and heating element
e) LED Lights
f) Protective cover, Type B according to DIN 28120
g) O Ring Seal (vacuum capable)
h) Additional options on request

ACI Type 320
Flange 1.4571 / 1.4541
Borosilicate glass
Standard Construction

Old type:

For corrosive media or steam we recommend adding a mica disk to protect the glass.


Nominal diameter DN25, DN40, DN50, DN80, DN100, DN125, DN150, DN200
Pressure rating PN16
Sight glass body 1.4404, 1.4539, 1.4541, 1.4571, H II
Process Connection Weld-on, Weld-in
Shape Round Sight Glasses
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