GEM's Heatless Dryer is based on the principle of pressure swing adsorption system, where in there is a tendency of desiccants to establish equilibrium with the surroundings. The air dryer system consist of high quality moisture adsorbing desiccant. During the drying cycle, the desiccant adsorbs moisture from the in coming wet air. During the regeneration cycle, a small portion of the dry air is passed through the desiccant at lower pressure to pick up and remove adsorbed moisture. Heatless Air Dryers unit consists of two towers with beds of activated alumina desiccants. An automatic timing devices alternatively sends air to either one of the tower. When one tower is drying the air, the other tower regenerates the desiccant. This is a self contained process which uses a purge of already dried air to pass through the desiccant bed at lower pressure. This purge air removes the adsorbed moisture particles from the desiccant.
All Dryers are fixed on a rugged frame with all rigid tubings. It is provided with initial fill of desiccant, pressure gauge, safety valve, electrical control panel, valves etc.
TIPS FOR SUCCESSFUL OPERATION:

GEM air Dryers is a self contained unit with all accessories provided on the skid. No special foundation is required. A closed room protected from rain moisture and dust is preferable. The compressor room will be an ideal location.
The air to the Dryers should be sufficiently cool (25 Deg.C to 40 Deg.C) to get the best performance, so an after cooler is necessary. Check if your compressor has one in good working condition.
Dryers should be mounted vertical level and free from any transmitted vibration. The surroundings temperature should not be abnormally high (above 40 Deg. C). Air pressure must not be less than 60 psi (4 kg/sq.cm.) nor more than 175 PSI (12 kg/sq.cm.).
GEM Dryers is built for trouble free operation round the clock service. But it requires some small care which keeps the equipment in best condition to give better performance and to last longer.
| RECOMMENDED SPARES FOR PREVENTIVE MAINTENANCE OF GEM DRYER | ||
|---|---|---|
| S.No. | Description | Recommendation For Change |
| 1 | Check Valve | - To be changed only on fault |
| 2 | Solenoid valve NO | - To be changed only on fault |
| 3 | Solenoid valve NC | - To be changed only on fault |
| 4 | Main flow valve seal kit | - To be changed if it found worn out |
| 5 | Exhaust valve seal kit | - To be changed if it found worn out |
| 6 | Pre Filter Catridge | - To be changed after 5000 running hours |
| 7 | After Filter Catridge | - To be changed after 5000 running hours |
| 8 | Oil Filter Catridge | - To be changed after 5000 running hours |
| 9 | Desiccant | - To be changed on GEM service personnel's recommendation |
| 10 | Timer unit | - To be changed only on fault |
| Desiccant has a normal life of approx 3 years. But if found oil contamination or size lost (Powder Form) it has to be changed. | ||
Minor Problems : 1.Cycle Failure, 2.Purge Failure, 3.No exhausting
Major Problems : 1.Continuous Exhaust, 2.Moisture after the Dryer, 3.Air not coming out of Dryer.
| Nature of Problem | Reason for the Defect | Remedy |
| 1. Cycle Failure | Electrical loose contact | Check electrical wirings |
| 2. Purge Failure | Purge valve chocked or closed | Check the purge valve |
| 3. No exhausting | Exhaust valve chocked | Check the valve |
| 'NO' solenoid valve fault | Check solenoid valve | |
| 4. Continuous exhaust for 5 minutes | Exhaust valve diaphragm failure | Check diaphragm condition if found damaged change it |
| 5. Continuous exhaust for 21/2 minutes only | 'NO' Solenoid valve of exhaust side fault | Check/Clean and Service solenoid valves |
| Main flow valve struck up | Clean/Service valve | |
| Check valve struck | Clean/Service check valve | |
| Purge open fully | Reset purge valve | |
| Main flow valve pilot solenoid valve fault | Check and clean service solenoid valve | |
| 6. Moisture coming after the drier | Check piping route raw air mixing with dried air elsewhere | Check thoroughly the piping arrangement |
| Purge not enough/failed | Check purge system | |
| Dryer not exhausting | Follow the remedy as instructed in 3 | |
| Cycle Failure | Follow the remedy in 1 | |
| Not draining filters Properly | Check filter drain and make sure draining properly | |
| 7. Pressure drop in the dryer | Desiccant is oil contaminated or Powder form | Check & replace the desiccant |
Desiccant has a normal life of approx 3 years. But if found oil contamination or size lost (Powder Form) it has to be changed.
Contact Gem Equipments Pvt Ltd to learn how an adiabatic cooling tower can help your facility save water, cut energy bills, and improve system hygiene — all while delivering high performance.
Gem Equipments entered the engineering and fabrication industry in 1984. We specialise in design, engineering and fabrication of Cooling Towers, Compressed Air Dryers, Industrial Chillers and Compressed Air Treatment Accessories.
Gem Equipments Private Limited
S.F. No.103, Avinashi Road, Arasur,
Coimbatore - 641 407,
Tamil Nadu , India
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