Flowtech make Moisture Absorbed Assembly is a very unique design & very useful instruments for removing Moisture when sucking air inside the tank.
Generally it should be installed on the top of the tank / vessel. In this design, Borosilicate toughened glass will be coupled between two flanges with the help of 4 ties roads.
On the bottom of the flange having perforated plate. Now glass should be filling up with silica gel. Bottom flange having vertical flange connection which is mounted on the top of tank while upper flange has air vent nozzle through which air will goes inside.
 
Material of construction

Flange       : Milted Steel / SS 304 / SS 316 / PP / PVC / MS with
Stud          : MS / SS 304
Glass         : Borosilicate
Gasket      : PTFE / CAF