318 Round tank Sight Glass PN 2.5 Light construction

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.

Show all product specifications

Flange: 1.4571 (Base Flange), 1.4541 (Cover Flange)
Glass: Borosilicate glass DIN 7081, Soda Lime Glass DIN 8903
Seal: C4400, PTFE, Silicone
Bolts: 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 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!

Special constructions/Options
a) Wiper
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
Borosilicate glass
Standard Contruction

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

Old type:


Nominal diameter DN80, DN100, DN125, DN150, DN200
Pressure rating PN2,5
Sight glass body 1.4541, 1.4571
Process Connection Weld-on, Weld-in
Shape Round Sight Glasses
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