Type 319 - PN 6 | Circular sight glass | ACI Industriearmaturen GmbH

Circular Sight Glass Fittings Type 319 - PN 6 similar DIN 28120

Short description - Tank Sight Glasses Type 319 similar to DIN 28120

The ACI tank sight glass PN6 type 319, like our type 320, is based on the proven construction regulations of DIN 28120. In comparison to our 100% compliant sight glass 320, type 319 uses a thinner and therefore cheaper glass which meets the requirements of PN 6. This allows you to save costs and still meet the requirements of your special application!

As with our range of sight glasses, the installation of cleaning devices such as spray nozzles type SV1 and wipers type SWI or SWII as well as the mounting of optional lights is also possible with type 319 and can be ordered from us.

The use of sealing materials and highly resistant flange materials tailored to your application ensures that you can make full use of the usual application possibilities of borosilicate glass 3.3 according to DIN 7080. Should your system itself reach the limits of this highly resistant material, Type 319 can also be equipped with a mica disc on request, which allows it to be used even with aggressive basic liquids and temperatures up to 300°C. The mica disc can also be used for the production of a wide range of applications. For even more aggressive media, we can offer you a protective disk made of FEP.

If our standard range of fibre gaskets, graphite with and without spit plate, PTFE, NBR or EPDM does not meet your requirements, the use of application-specific special materials is no obstacle.

For more technical details and detailed information about our round vessel sight glass type 319, please read below.

Technical details


Base flange and cover flange:
P265GH, 1.4306 (F304L), 1.4404 (F316L), 1.4462 Duplex (F51), 14539 (Alloy 904 L), 1.4541 (F321) , 1.4571 (F316Ti) or according to customer specifications

Sight glass:
borosilicate glass acc. to DIN 7080
Soda-lime glass acc. to DIN 8902

Seal: Klingersil® or as desired

Screws: A4-70


similar to DIN 28120 but PN 6

Nominal size:

DN 50 - DN 200

Nominal pressure:

up to 6 bar


With soda-lime glass up to max. 150°C

With borosilicate glass up to max. 280°C

With borosilicate glass & mica screen up to max. 320°C


High temperature version for up to 450°C


Special designs/options

a) With windscreen wiper type SW1 or SWII

b) With spraying device type SV1

c) double glazing

d) Double glazing + heating element

e) With LED or halogen luminaires, also ATEX-certified

f) With protective coating, version B according to DIN 28120

g) With O-ring seal (suitable for vacuum)

h) High-temperature version with quartz glass

i) Plexiglas impact protection window (5mm)

j) Other special designs on request

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Type 319 - PN 6 | Circular sight glass