Tubular sight glass type 622 PN 16

Product information

The ACI tubular sight glass type 622 with internal thread according to DIN EN ISO 228-1 offers a complete 360° view of the process medium through a borosilicate glass cylinder. Encased between two high-quality flanges made of stainless steel or steel, it allows for comprehensive visual monitoring of your system.

The standard version is equipped with flanges made of stainless steel 1.4571 (316Ti) – a material that has proven itself through excellent corrosion resistance and durability in industrial applications. For less demanding environments, an option with flanges made of P265GH is also available. Furthermore, special materials such as Hastelloy®, duplex steels, or other high-performance alloys can be realized on request.

The glass tube is made of industrially tested borosilicate glass 3.3 according to DIN ISO 3585. It impresses with high temperature and chemical resistance as well as very good optical properties.

The sealing of the glass cylinder is done with individually selectable flat seals from a wide range of materials – from classic fiber seals to high-quality specialty materials such as PTFE (Teflon®), NBR, novaphit® MST-XP, or KlingerSil® C4400. This allows the gasket to be optimally tailored to the medium, temperature, and pressure.

Thanks to the precise coordination of flange, gasket, and glass, the fitting is nearly dead-space-free and thus suitable for hygienically demanding processes.

For areas with increased mechanical risk – e.g., when installed under walkways – we recommend optionally available impact protection covers. These reliably protect the glass tube from falling objects and minimize the risk of unplanned failures or damages.