Air Sentry D-Series breathers feature numerous models in a variety of sizes, all designed to satisfy the requirements of most stationary fluid management applications. The breathers provide application flexibility by using 100% silica gel for moisture adsorption, 100% activated carbon for fume and odor control or both, when necessary.Air Sentry D-Series breathers is constructed of industrial grade raw materials, tested to ensure a wide range of chemical compatibilities, and features high impact resistant ABS top and bottom caps. The clear acrylic tube makes it easy to inspect the condition of the color-changing silica gel from a distance. The silica gel turns from gold to dark green to visually indicate the adsorption of moisture and confirm the breather is getting the job done!Air Sentry D-Series breathers feature 2-micron solid particle filtration (one on the inlet and a second on the outlet) and are available with airflow ratings of 20 cfm.Applications: • Oil & lubricant storage tanks • Fluid Reservoirs • Transformers • Pumps • GearboxesOperating Temperature: -29°C to +93°CBase Material: 100% Silica GelMax. air flow/fluid flow: 20 cfm / 150 gpmMounting connections: Slip fit, 1”MNPT, 2” MNPT, 3”MNPT Operating Temperature: -29°C to +93°C