Continental Trade Sp. z o. o.


Type 324 - high performance


The ACI tank sight glass type 326 is a variation of the type 321/323, intended for an extended range of applications, especially at higher temperatures and simultaneously higher pressures. This high performance sight glass is used to observe and illuminate the interior of closed vessels (boilers, tanks, silos, etc.).

The PTFE-encapsulated gaskets normally used in Type 321 are no longer safe to use above a temperature of 200°C. This means that the PTFE-encapsulated gaskets are no longer safe to use. In order to eliminate this disadvantage, we use high-quality gaskets on the basis of graphite, mica or carbon fibre for the Type 326, with the result allowing an operating range for the sightglass fitting of more than 400°C. The sightglasses are designed for continuous operation at elevated temperatures and perssures.

The fitting is completely assembled at our factory and, on request, tested for pressure resistance and tightness so that you can rely 100% on our quality.



Base flange:
1.4462 / 1.4539 / 1.4541 / 1.4571 / 1.4724 / 1.4762 / 1.4828 / 1.4841 / 1.4845 / 1.4948 / 1.6920 / 2.4605

Cover flange:
1.4462 / 1.4539 / 1.4541 / 1.4571 / 1.4724 / 1.4762 / 1.4828 / 1.4841 / 1.4845 / 1.4948 / 1.6920 / 2.4605

Borofloat glass, quartz glass, sapphire glass

Graphite, mica, carbon fibre

for mounting on tank flanges according to DIN EN 1092-1 following DIN 28121

Nominal size:
DN40 up to DN100

10 to 360 bar (depending on material combination)

400°C / special versions up to 1000°C are possible

Take a look at the animation video, here you can see the structure of our sight glass type 326 perfectly.

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

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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.

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