Double Safety Sightglass0 pages

lumiglas
Data sheet 01.04
lumiglas®
F.H.Papenmeier GmbH & Co. KG · division Lumiglas
Talweg 2 · 58239 Schwerte · GERMANY
phone: +49-2304/2050 · fax: +49-2304/205206
e-mail: info.lumi@papenmeier.de
www.lumiglas.de
– also available with inter glass heating –
Double glass safety sightglasses comprise a pair of circular
recessed flanges housing twin glass discs four seals and a
supporting spacer ring, for bolting onto weld neck nozzle flanges,
weld pads etc.
The exploded view below shows how the glass disc, their
respective seals and the spacer ring are sandwiched and
mechanically compressed into a single entity by socket head bolts.
• Connecting Sizes: PN 10/16
The design of the supporting spacer ring ensures that each of
the two glass discs is able to withstand the maximum rated
operating pressure and max. permissible temperature
independently of the other.
• Application:
For viewing of internals of pressure vessels, silos, stirred vessels,
separators, pipelines and other normally enclosed systems.
Continuous monitoring for leakage is possible with externally
fitted pressure gauge.
• Operating conditions:
Pressure: 10 bar (higher pressure ratings on request)
Temperatures: 280° C with toughened Borosilicate glass to
DIN 7080
150° C with toughened Sodalime to DIN 8902
(higher temperatures on request)
• Combinations:
These units can be combined with Lumiglas luminaires for use in
Ex hazardous as well as non hazardous areas – see data sheets
series 06 and 07. The cover flange can be drilled and tapped to
suit the luminaire mounting brackets.
• Parts and material alternatives: The adjoining diagram shows:
Item Part Material
1 Base flange Steel RST 37-2
Stainless steel 1.4571 or other
2.1+2.2 Seal KLINGERsil C-4400, Silicon, PTFE
or other
3 Sightglassdiscs Sodalime glass DIN 8902,
Borosilicate DIN 7080
4 Spacer support ring Steel RST 37-2, Stainless steel
1.4571 or other
5 Cover flange Steel RST 37-2, Stainless steel
1.4571 or other
6 Compression bolts DIN 912
• The diagram below serves for materials selection:
Double glass safety sightglass fitting
Exploded view of a double sightglass assembly
Complete double sightglass safety fitting
Glass Seal
80
100
150
200
250
280
300
° C
Soda
Bun
C-4400
Boros ilicate
Silicone, PTFE, Viton