Flow sight glass type 591 PN 16/400

Product information

Flow sight glass for working pressures up to 400 barg with flange connections according to DIN EN 1092-1.

The flow sight glass type 591 with 3 viewing windows as a welded construction is a particularly robust version of our flow sight glasses.

A clear advantage of the third viewing window is the ability to illuminate the flowing medium to optimally observe the process. Additionally, the third viewing window provides the opportunity to integrate a measurement or camera system.

The type 591 is designed for working pressures up to 400 barg and can be easily installed between flanges according to DIN EN 1092-1. Thanks to its standard lengths according to DIN EN 558-1, the sight glass is ideal for retrofitting into existing systems.

Even with larger nominal diameters, high working pressures can be realized with the type 591.

The standard version with borosilicate glass is suitable for working temperatures up to 280 °C, with an additional mica protective disk even 300 °C or 320 °C in combination with MAXOS® safety sight glasses according to DIN 7080.

The sealing of the fitting is done with flat gaskets tailored to your needs from a wide range of materials. In addition to the common fiber gaskets, this offers more demanding materials such as PTFE (Teflon®), NBR, novaphit® MST-XP, KlingerSil® C4400, and many other branded seals.