The dry beads consist of silicic acid (silicon dioxide, silica gel) in the form of hard grains or spheres with a glass-like appearance.
They Pressure/vacuum relief valve Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve. are strongly water-attracting (hygroscopic) and are therefore used as an adsorption material or desiccant for drying moist air. Colored dry beads Dry beads The dry beads consist of silicic acid (silicon dioxide, silica gel) in the form of hard grains or spheres with a glass-like appearance. are also used to make it easy to visually assess the loading of dry beads with water. The dye changes color depending on the water content of the dry beads. The dry beads can be regenerated by heating.