High pressure tank sight glass type 322 - PN 40 up to PN 160

High-pressure tank sight glass similar to DIN28121 PN63 | PN100 | PN160

The ACI Tank Sight Glass Type 322 for high-pressure applications is a reinforced sigh glass fitting based on our Type 321.

Due to the significantly reinforced flange and the use of glass plates beyond the standard dimensions of DIN 7080, we are able to achieve operating pressures of up to 160 bar with Type 322.

The glass is clamped in a similar way to our proven Type 321 by means of pretensioning screws. This ensures that the fitting only has to be professionally fastened to the carrier flange in your system in order to achieve the necessary sealing.

A version for increased temperature can also be realised by using appropriate seals and glass materials. Due to the high operating pressure, the installation of wipers and sprayers is unfortunately not possible with the Type 322. Lighting based on LED light sources is available from us.

Like our other types of round tank sight glasses, Type 322 is also available in a variety of steel grades and can therefore be perfectly adapted to your individual requirements! Mica discs and various high-performance materials such as quartz or sapphire glass cover even the most demanding operating conditions.

Read on for more technical information or watch our product video in the top!

Lloyd´s Register design appraisal

with Lloyd´s Register design appraisal

Technical details


Base flange:
1.4404 / 1.4539 /1.4571 / 1.4541 / 2.4602 / 2.4605 / other materials on request

Cover flange:
1.4404 / 1.4539 /1.4571 / 1.4541 / 2.4602 / 2.4605 / other materials on request

Sight glass:
Borosilicatglass DIN 7080 or Quarzglass

the material is dependent on pressure and media


assembly for bolting straight onto DIN flanges

Nominal size:

DN 40 up to DN 100

Nominal pressure:

PN 40 / PN 63 / PN 100 and PN 160
- higher pressures on request


max .: 280°C / Special versions up to 500°C are possible

Optional versions are possible

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High pressure tank sight glass type 322 - PN 40 to PN 160