The Reservoir Vent Dryer is designed to protect storage drums and tanks during operation. As the fluid is drawn from the reservoir or the air above, it is displaced by temperature variations. The air entering the reservoir goes through an active bed of desiccant, removing and retaining water vapour. Quick and simple to install, the vent dryer is also fitted with Envirogel Desiccant (Orange-indicating Silica Gel) that is easy to change and visible. Once the Envirogel Desiccant becomes saturated by water vapour, it visually alerts users through its colour change from orange to green, indicating the need for replacement. The product is ideally used by companies with storage drums, tanks, and reservoirs as it requires no energy and provides continuous protection for your items. The Reservoir Vent Dryer is capable of preventing your fluids from absorbing water vapour and condensing. Once your fluids condensate, physical and chemical changes would occur, making it unusable. Field tests have shown that when the Reservoir Vent Dryers are installed, the air space is safe from condensation within the first few hours.