Circular Sight Glass Disc to DIN 89020 pages

lumiglas®
lumiglas
Data Sheet 00.02
EN ISO 9001
Q A: 041003296
Circular Sightglass Discs (Soda Lime) to DIN 8902 resp. similar to DIN 8902
All dimensions in mm unless stated otherwise. Subject to change without prior notice.
Web 05.05 3755.163
Dimensions Viewing Diameter Nominal Pressure
D x s d1
(mm) (mm) (bar)
DIN-Dimensions
63 x 10 48 16
80 x 12 65 16
*94 x 121) 801) 6
100 x 15 80 16
*113 x 151) 1001) 6
125 x 15 100 10
*125 x 192) 100 16
*141 x 151) 1251) 6
*150 x 192) 125 10
150 x 25 125 16
*166 x 151) 1501) 6
*175 x 192) 150 10
175 x 25 150 16
*200 x 192) 175 8
200 x 25 175 10
250 x 25 225 8
other dimensions on request
• For pressure duties at temperatures up to 150° C.
No lower temperature limit.
• Toughened (tempered) soda lime glass.
• Ground and polished.
* no DIN-Dimension!
1) for screwed sightglass fittings similar DIN 11851
2) ‘s‘ according to DIN = 20 mm
• Safety precautions when using sightglass discs:
1. Whenever a sightglass assembly has been taken apart it is
urgently recommended in accordance with DIN 8902 that
the glass disc and gaskets are replaced by new ones. That
is particularly important in the case of pressure vessels
and/or aggressive media.
The following extract from DIN 8902 text is verbatim:
‘Sightglass discs may only be installed by personnel who
have been informed fully about the following
requirements:
• care in handling sightglass discs
• cleaning of recesses, sightglass discs, gaskets and other
parts i.e. removal of foreign bodies (e.g. swarf), prior to
installation/reassembly
• even tightening of retaining bolts
Sightglass discs that have been removed after operating
use must not be re used.‘
2. Planned maintenance:
Sightglass discs should be included in routine maintenance
and periodically checked visually or using ultrasound
wall thickness measuring means. In the event of damage,
a glass disc must be promptly exchanged, with the plant
first having been brought to a standstill. The service life
of a sightglass – relative to the particular vessel in which it
is mounted – should be established by regular and careful
visual check of its condition. That will enable an exchange
routine to suit the process to be set up.
3. Breakage of a sightglass:
In spite of careful installation and recommended use,
sightglass discs can, on rare occasions, suffer breakage
through external influences. In order to prevent the entry
of glass particles into products of a critical nature, e.g.
foodstuffs, appropriate safety precautions should be
taken by the plant manufacturer or user.
D
d1
edges chamfered gasket
s
F.H.Papenmeier GmbH & Co. KG
P.O.Box 1620 · D-58211 Schwerte
Tel: +49-2304/2050 · Fax: +49-2304/205206
E-mail: info.lumi@papenmeier.de
www.lumiglas.de