Continental Trade Sp. z o. o.


Type 390 - PN16/40



The ACI Tank Sight Glass Type 390 is a round sight glass with welding ends according to DIN EN 1092 for welded installation on open pipes or tank walls.

The sight glass window is an industrially proven and highly resistant borosilicate safety sight glass according to DIN 7080 for operating temperatures up to 280°C on the connection side, Type 390 is equipped with a welding end matching the dimensions defined in DIN EN 1092-1, allowing it to be welded onto most open pipe ends without additional preparation.

Base and cover flanges are available in steel and stainless steel alloys for pressure equipment, like P265GH, 1.4571 or 1.4404. Special high performance materials like Hastelloy or duplex steel are available on request.

The borosilicate glass disc is sealed using high quality gasket materials like KlingerSIL C4400 aramid fibre gaskets or Frenzelit novaphit MST for elevated temperatures. Soft, rubber-like materials like silicone, NBR or EPDM are also available preinstalled in your sight glass fitting. For highly corrosive chemicals we recommend pure or modified PTFE, Garlock Gylon or a wide range of special gasket materials.

The sight glass Type 390 is also available with preinstalled cleaning equipment like wipers or spray nozzles. On request, we prepare the device with threaded mounting holes for lighting with halogen or LED light sources.

Read on for more technical information, detailed 3D views and more!



base and cover flanges: 
1.0460 / 1.4301 / 1.4306 (F304L) / 1.4404 (F316L) / 1.4410 (Super Duplex) / 1.4435 (F316L) / 1.4462 (F 51) / 1.4529 (Alloy 926) / 1.4539 (Alloy 904L) / 1.4541 (F321) / 1.4547 (F44) / 1.4550 (F347) / 1.4571 (316Ti) / 1.4828 / 1.4841 / 1.4876 ( Alloy 800H) / 1.4878 / 1.7335 / 2.4068 (Alloy 201) / 2.4360 (Alloy 400) / 2.4375 (Alloy K500) / 2.4602 (Alloy C-22) / 2.4605 (Alloy 59) / 2.4610 (Alloy C-4) / 2.4816 (Alloy 600) / 2.4819 (Alloy C-276) / 2.4856 (Alloy 625) / 2.4858 (Alloy 825) / 3.7035 (Titan)

Sight glass with welding end DIN EN 1092

Nominal size:

Nominal pressure:
PN16 / PN25 / PN40 / PN63 / PN100 / PN160

PTFE / FKM / NBR / C4400 / Silicone / EPDM / Graphite (novaphit MST)
- or as desired

With soda lime glass up to max. 150 ° C
With borosilicate glass up to max. 280 ° C
With borosilicate & mica shield up to 320 ° C
With quartz glass for temperatures up to 1000 ° C

(depending on the material combination)

Take advantage of our 360 degree 3D view for a perfect all-round view of our product.

Take a look at the animation video, here you can see the structure of our container sight glass type 390 perfectly.

There is also a version Type 390V for vacuum applications.

Download data sheet:

While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

Information clause

What personal data are processed and who is their administrator?

When using our services, personal data that we process may be, for example, the IP address of your device, data obtained from cookies or similar mechanisms for recording information in Users' devices, as long as they allow you to identify you. More information about the scope of personal data and cookies can be found in the Cookies policy and in Privacy policy.

Administrator, ie the entity deciding on which personal data will be processed and for what purpose, and in what way, is Continental Trade Sp. z o.o. (hereinafter "Continental Trade" or "We") with its registered office and address in Warsaw at Krasnobrodzka Street 5.

What is the purpose and basis of the processing of your personal data by Continental Trade ?

Continental Trade processes your personal data to enable you to use our services, match the displayed content and ads to your interests, measure quality and effectiveness, improve content and services.

The basis for the processing of personal data is the legitimate interest of Continental Trade. It includes improving services, ensuring their best quality and informing Users about them.

Confirming that you have read this information,   by clicking on "Go to website" or closing this window at the same time you agree that your personal data will be processed in the same way as described here. You can manage your consent, including withdrawal.

Providing personal information is voluntary.

What are your rights to   Continental Trade in terms of processed data?

You can request from Continental Trade: access to data, rectification, deletion, transfer and, in some cases, processing restrictions, and you have the right to object to the processing of your personal data when personal data are processed on the basis of the legitimate interest of the administrator. You have the right to file a complaint regarding the processing of your personal data to the President of the Office of Personal Data Protection.

To whom does Continental Trade share your personal data?

Continental Trade, in principle, does not share your personal data with third parties, except for situations in which Continental Trade has a legal basis, including at the request of authorized entities, or when it is necessary to perform services offered by Continental Trade, e.g. entrepreneurs providing hosting of our services.

How long does Continental Trade store your personal data?

Continental Trade stores Users' personal data only for the time that is necessary to achieve the purposes for which the data was collected and provided that one of the legal grounds described above is up-to-date or when a new ground has appeared, e.g. a law or the need to enforce claims in court proceedings.

Who can you contact for more information on the processing of personal data by Continental Trade?

If you have questions related to the processing of your personal data on websites operated by Continental Trade or would like to report the issue related to the processing of personal data by Continental Trade, you can contact a Continental Trade representative using the contact information:

More information on the protection of your personal data can be found in the Cookie Policy and Security Policy documents published on our website