Sight glasses are manufactured from AISI 304L and AISI 316L stainless steel and are available either in-line or with radial connection.

They are of high strength construction. Glass is in Pyrex and is available with a Plexiglas external guard as an option.
Sight glasses are equipped with special tie rods and seals to prevent load pressures and vibrations on the glass.

The standard finish is 120 grit (Ra 1.01-1.14 µm max).

The maximum operating pressure is 10 bars.