General Features
Optional
Fill and drain ports:
- Separate fill and drain ports for ease of desiccant replacement.
- Heavy duty purge exhaust mufflers for quiet operation.
- Non-lubricated inlet control valves.
- Purge flow valve for adjusting purge rate.
- Pressure relief valves on both towers.
Stainless steel support screens and air diffusers:
- Easy removable for cleaning.
- Filters out gross contaminants to protect valves.
- Prevents channeling.
Structural Steel Frame with complete floor stand:
- Easy installation.
- Dryer is completely assembled, piped and wired before shipping.
- Optional factory mounting of pre and after filters.
- Shipped with full charge of desiccant (alumina or molecular sieve).
- Only hookup utilities need to operate.
- Lifting lugs for easy handling.
Filters
Pre Filter:
Every dryer should be equipped with a pre-filter to protect the desiccant from free water contamination, dust, scales, etc., from compressed air supply. This assures top efficiency and longer desiccant life.
Zero Oil Filter:
Oil from the compressor’s crankcase will be passed on to the line with the compressed air. This will severely affect the life of the desiccant. To prevent this, oil particles are removed in this filter (up to 1-micron rating).
After Filter:
This is provided after the dryer to remove the desiccant dust carried over to the equipment.
Technical Specification
| MODEL | Air Flow | Electrical Connection | Inlet / Outlet | Dimensions (mm) | Dessicant | Weight | |||||
| CFM | Nm3 / hr | V | Ph | Hz | BSP | L | W | H | Qty/tower | Kg | |
| HLD-030 | 300 | 510 | 230 | 1 | 50 | 2" NB | 1400 | 1000 | 2400 | 110 | 350 |
| HLD-040 | 400 | 680 | 230 | 1 | 50 | 3" NB | 1400 | 1200 | 2480 | 140 | 400 |
| HLD-050 | 500 | 850 | 230 | 1 | 50 | 3" NB | 1600 | 1300 | 2230 | 180 | 500 |
| HLD-060 | 600 | 1020 | 230 | 1 | 50 | 3" NB | 1600 | 1300 | 2450 | 215 | 650 |
| HLD-075 | 750 | 1275 | 230 | 1 | 50 | 4" NB | 2000 | 1300 | 2200 | 260 | 800 |
| HLD-100 | 1000 | 1700 | 230 | 1 | 50 | 4" NB | 2000 | 1300 | 2500 | 360 | 950 |
| HLD-125 | 1250 | 2125 | 230 | 1 | 50 | 6" NB | 2000 | 1300 | 2750 | 450 | 1150 |
| HLD-150 | 1500 | 2550 | 230 | 1 | 50 | 6" NB | 2200 | 1400 | 2200 | 520 | 1400 |
| HLD-200 | 2000 | 3400 | 230 | 1 | 50 | 6" NB | 2200 | 1400 | 2860 | 720 | 1750 |
| MODEL | Air Flow | Electrical Connection | Inlet / Outlet | Dimensions (mm) | Dessicant | Weight | |||||
| CFM | Nm3 / hr | V | Ph | Hz | BSP | L | W | H | Qty/tower | Kg | |
| HLN-002 | 20 | 34 | 230 | 1 | 50 | ½" BSP | 500 | 400 | 1315 | 20 | 75 |
| HLN-003 | 35 | 60 | 230 | 1 | 50 | ½" BSP | 500 | 400 | 1565 | 35 | 90 |
| HLN-006 | 60 | 102 | 230 | 1 | 50 | ¾" BSP | 730 | 450 | 1245 | 60 | 120 |
| HLN-007 | 75 | 128 | 230 | 1 | 50 | ¾" BSP | 730 | 450 | 1340 | 75 | 150 |
| HLN-010 | 100 | 170 | 230 | 1 | 50 | 1" BSP | 750 | 450 | 1830 | 100 | 200 |
| HLN-012 | 125 | 215 | 230 | 1 | 50 | 1½" FLG | 1000 | 500 | 1675 | 120 | 250 |
| HLN-015 | 150 | 255 | 230 | 1 | 50 | 1½" FLG | 1000 | 500 | 2060 | 150 | 290 |
| HLN-017 | 175 | 298 | 230 | 1 | 50 | 1½" FLG | 1100 | 560 | 1645 | 170 | 320 |
| HLN-020 | 200 | 340 | 230 | 1 | 50 | 1½" FLG | 1100 | 560 | 1710 | 200 | 350 |
| HLN-025 | 250 | 425 | 230 | 1 | 50 | 2" FLG | 1100 | 560 | 1810 | 250 | 400 |
Customized models are also available based on customer requirements.
Specifications
- Air Flow Capacity: 300 to 2000 SCFM (510 to 3400 Nm³/hr)
- Electrical Supply: 230 V, Single Phase, 50 Hz
- Inlet/Outlet Connection: 2" NB to 6" NB (BSP)
- Operating Pressure: Standard models suitable for typical industrial compressed air systems
- Dew Point: Up to -40°C (Up to -80°C with molecular sieves)
- Desiccant Type: Bulk desiccant
- Desiccant Quantity: 110 to 720 kg per tower (based on model)
- Construction: Twin-tower design with pre-filter protection
- Control System: Motorized cam timer and PLC-based control
- Cycle Indication: Includes cycle failure indication
- Mounting: Skid-mounted for easy installation
- Customization: Models available for higher pressures and special dew point requirements
Frequently Asked Questions on Heatless Desiccant Compressed Air Dryers
Q: What is a Heatless Desiccant Compressed Air Dryer?
A Heatless Desiccant Compressed Air Dryer removes water vapor from compressed air using adsorption. It regenerates with purge air, ensuring dew points up to -40°C and ultra-low moisture levels.
Q: Where are Heatless Desiccant Dryers used?
They are widely used in pharmaceutical, food, textile, automotive, and electronics industries where moisture-free compressed air is critical.
Q: What are the benefits of a Heatless Desiccant Dryer?
They protect equipment from corrosion, improve product quality, reduce downtime, and offer reliable performance with low maintenance.
Q: What capacities are available?
Gem Equipments manufactures Heatless Desiccant Compressed Air Dryers from 10 CFM up to 3000 CFM, suitable for small workshops and large industrial plants.
Our process needs air far drier than a standard refrigerated dryer can deliver -- what is the option?
The Heatless Desiccant Dryer holds a stable dew point down to -40 degC standard, or -80 degC with molecular sieves, well below what refrigerated dryers achieve.
A desiccant dryer failed silently on us before and contaminated the line -- how would we know here?
This unit has PLC control with cycle-failure indication, so a malfunction is flagged rather than passing unnoticed.
Desiccant cartridges are expensive to keep replacing -- is there a cheaper long-term option?
It uses bulk desiccant media rather than proprietary cartridges, and an optimised adsorption cycle reduces purge-air consumption to cut running cost.