Round Sight Glass
PN 2.5, Light construction
For welding, similar to DIN 28120
Observation and illumination of the interior of enclosed vessels (boilers, 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.
Flange: 1.4571 (Base Flange), 1.4541 (Cover Flange)
Glass: Borosilicate glass DIN 7081, Soda Lime Glass DIN 8903
Seal: C4400, PTFE, Silicone
Other materials on request
After welding the base flange onto/into the pressure vessel, the sealing surface must be checked for deformations! Reworking may be required!
The pressure rating does not consider the base flange. This will have to be audited together with the pressure vessel according to AD 2000 instructions B9 or equivalent standard!
b) Double layered glass
c) LED Lights
d) O Ring Seal (vacuum capable)
e) Additional special constructions on request
ACI Type 318
Flange 1.4571 / 1.4541 11-318-100-1-1-1-000
For corrosive media or steam, we recommend adding a mica disk to protect the glass!