- 1/4" to 1" NPT Ports
- Capacities to 60 SCFM
- Pressure Dewpoints Down to -40° F
GLA Products unique in-line air/gas dryer system is engineered for easy desiccant changeouts, longer life and lower pressure drop.
The GDD Series is designed to remove water vapor and aerosols at point-of-use for intermittent flows up to 60 SCFM. Inline dryers do not require steady flow for constant dewpoint supression.
A color changing moisture indicator with visual sight gauge indicates the desiccant needs replacement.
Standard Features
- Steel Bowl with Integral Sightglass
- Zinc Head
- Sintered Bronze Elements with Collar Connect for Easy Changeouts (prevents desiccant carry over)
- Maximum Operating Temperature: 180° F
- Maximum Working Pressure: 300 PSI
- Optimum Working Temperature: Below 100° F
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Dessicant Types
 Silica Gel - 100 percent indicating silica gel provides maximum moisture absorption and dewpoints down to -40° F.
Outstanding features of Silica Gel include:
- High adsorption capacity - average surface area for each bead is over 200 ft
- Low abrasion, due to high mechanical strength for long service life
- Ideal packing in bowl due to bead shape
- Uniform color change
- Excellent regeneration characteristics
As the silica beads adsorb moisture, they change from blue to pink, indicating the need for replacement or regeneration. The desiccant can be regenerated by heating in a drying oven to a temperature higher than 212° F but not over 350° F. Desiccant may also be regenerated in microwave ovens.
Molecular sieve — Molecular sieves are crystaline, metallic aluminum silicates. The type 4A offers exceptional water vapor adsorption characteristics. Dewpoints are attainable to -40° F.
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Why Inline Dessicant Dryers?
 GDD desiccant dryers are the simplest and most reliable method of insuring your sensitive pneumatic equipment is not exposed to damaging moisture. When air is compressed, the temperature of air is increased as is its capacity to hold moisture. As the hot moist air travels downstream through the pipelines,  it cools, allowing the moisture to condense. Aftercoolers, filters, drain traps and driplegs are effective for removing condensate. But for removing residual water vapor and aerosols, use the inline Desiccant Dryer.
How Do They Work?
 As the wet compressed air flows through the inlet port and down through the bed of desiccant, the desiccant beads adsorb the water vapor and aerosols. The silica gel beads are so effective in adsorption, the air humidity can be reduced to a -40° F pressure dew point. Unless your compressed air is exposed to a temperature below the dewpoint, there will be no further condensation forming in your air lines.
After the moisture has been removed, the dry air passes through a sintered bronze element, up the center tube, and out the outlet port. As long as the desiccant is replaced regularly, your equipment will receive ultra dry, moisture-free air.
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