Activated Alumina Technical Specifications
| 1/8" (2-5 mm) | 3/16" (4-8 mm) | 1/4" (5-10 mm) | |
| Color and Form | White Bead | White Bead | White Bead |
| Bulk Density | 48 lbs/ft3 | 48 lbs/ft3 | 48 lbs/ft3 |
| Average Break Pressure | 17 - 30 lbs. | 45 - 60 lbs. | 50 - 70 lbs. |
| Surface Area | 1.74 x 106 sq ft/lb | 1.65 x 106 sq ft/lb | 1.59 x 106 sq ft/lb |
| Humidity | 1/8" (2-5 mm) | 3/16" (4-8 mm) | 1/4" (5-10 mm) |
| 100% RH | 42.0% | 40.0% | 36.0% |
| 90% RH | 37.5% | 35.0% | 32.0% |
| 60% RH | 21.5% | 21.0% | 17.5% |
| 10% RH | 7.5% | 7.0% | 6.0% |
| • | 1/8" bead most frequently used in regenerative air dryers. |
| • | 3/16" bead used when pressure drop and surface area requirements fall between 1/8" and 1/4" bead size. |
| • | 1/4" bead used as a pre-bed material to support large desiccant beds or as a buffer for silica gel beads. |