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Double glazed security
sightglasses similar
to DIN 28121
For use with nominal pressure of PN 10 (higher pressures on demand)
Application:
For cases where the possible destruction of a single sightglass would present
a considerable safety risk.
The sightglasses contain two independent glass discs built into an intermediate
support ring. The damage of one disc doesn't affect the guaranteed security of
the unit.
The preassembled units are to be screwed onto existing pre-welded, base or
other flanges.
Dimensions to DIN 28121, except the height.

Double glazed safety sightglass similar
to DIN 28121, DN 125, PN 10

Maximum allowed temperatures:
280 °C with glass discs in borosilicate to DIN 7080
150 °C with glass discs in sodium silicate to DIN 8902
The above indicated temperatures may change depending on the quality of the
gaskets
Nominal diameters:
DN 50 - DN 200 (free view from 65 mm to 175 mm)
Construction and materials:
Pos.:

Part:

Material:

1

Base flange

Boilerplate, stainless steels, Titanium, Hastelloy etc.

2.1 / 2.2 Gaskets

KLINGERsil C 4400, Silicone, PTFE etc.

3

Sightglass
discs

Sodium silicate to DIN 8902
Borosilicate to DIN 7080

4

Intermediate
support ring

Boilerplate, stainless steels, Titanium, Hastelloy
etc.

5

Cover flange

Boilerplate, stainless steels, Titanium, Hastelloy etc.

6

Tightening bolts 8.8, A2, A4

Option:
Also available as heated version to prevent condensation or deposits on the
glass discs.
Electrical data:
Supply voltage:
24 V (AC or DC)
Nominal rating:
50 / 75 / 100 W (not regulated)
Further applications:
- Spoiling with cooling liquids e.g. to prevent non allowed elevated glass
temperatures
- Leak control, e.g. by spoiling with inert gases and concentration monitoring
or measuring pressure differences
Possible combinations:
Above sightglasses may be combined with our sightglass light fittings of
the series CHEMLUX®, EdelLUX®, fibroLUX®, miniLUX® or metaLUX®. With
integrated heating element, the use is restricted to safe area applications.
Certificates:
To be supplied against extra charge to DIN EN 10204.

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