DD/DC Series (Standard Pressure Range)
Provide ADP up to -40° to -60°C & max up to (-) 70°C
Range 3.5 CFM to 1200 CFM (6 m3/hr to 2030 m3/hr)Our Airgineers Can Help You Select The Right Product!
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A desiccant dryer is a specialised device used to remove moisture from compressed air or other gases, ensuring the air is dry and suitable for various industrial applications. It operates by passing the moist air through a desiccant material, which adsorbs the water vapour.
Features
- Available in 19 standard models
- Best atmospheric dew point achievable (-) 40°C & max up to (-) 70°C
- Special graded desiccant DelsorbTM 10 and DelsorbTM 21 for optimum performance and long life
- Electronic controls/solid state timers for automatic and reliable operation
- Equipped with a muffler on the purge air outlet to reduce the noise level
Optional Energy Savings Features & Advantages on Request
Optional Features
- Humidity indicator
- Filters and/or total dryer bypass line with valves
- Special Delair Filters for removal of water, oil mists, oil vapour and dust particles with electronically operated drain valves
- Explosion-proof controls for offshore application
- Construction according to various codes
- Delair also manufactures standard high pressure Desiccant Dryers for PET industry/PET blowing applications
Std. Working Parameters
- Working Pressure: 7.0 Bar(g)
- Air inlet temperature: 40°C
- Ambient temperature: 40°C
- Working Pressure range (Min./Max.): 5.0 to 14.0 Bar(g)
Desiccant Dryer is based on the principle of heatless regeneration and the physical properties of desiccant to adsorb and desorb water vapour. It uses the pressure swing principle/purge air to generate the desiccant bed.
The Desiccant Dryer has two pressure vessels/towers filled with desiccant. While the air is dried in one tower/vessel, the desiccant in the other is regenerated, thus maintaining a continuous and automatic operation.
Drying: The wet compressed air is led into one of the adsorber towers through solenoid valves in the smaller models and pneumatically controlled valves in the bigger models. This wet compressed air is passed through a specially designed sieve tube for a uniform flow of air through the desiccant tower, where it is dried. Part of this dried air is taken out and used for purging or reactivating the desiccant of the tower saturated with moisture. The balance dry air leaves the dryer through a check valve.
Regeneration: The purge air with a low water vapour pressure is passed over the desiccant (saturated with adsorbed moisture). The desiccant loses the adsorbed moisture, which is expelled into the atmosphere via an outlet valve through a muffler. Now, the desiccant is dry and ready for adsorption. The heat of adsorption released during this process raises the temperature of the desiccant, which in turn stimulates the liberation of the adsorbed water vapour and, thus, the regeneration.
Change Over: After a preset time, the desiccant in the first tower needs to be regenerated as it is saturated with the adsorbed moisture. The outlet purge air valve of the second tower is energised in a sequence, where the outlet valve closes first to pressurise the adsorbent in the tower in regeneration mode. The second tower becomes the adsorber while the first changes to regeneration mode. The wet compressed air now passes through the freshly regenerated adsorber tower, thus setting up a continuous process.
| MODEL No. | CAPACITY IN M3/HR. PRESSURE IN KG/CM2 (G) |
CONNECTION BSP FEMALE / FLANGE (IN INCHES) |
DIMENSIONS (IN MM) |
WEIGHT (IN KGS) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | L | W | H | |||
| DD-6 | 4.5 | 5.4 | 6.3 | 7.1 | 8.0 | 8.9 | 9.8 | 10.7 | 11.6 | 12.5 | 1/4″ BSP | 410 | 350 | 690 | 20 |
| DD-12 | 8.9 | 10.7 | 12.5 | 14.3 | 16.1 | 17.9 | 19.6 | 21.4 | 23.2 | 25.0 | 1/4″ BSP | 420 | 350 | 700 | 22 |
| DD-25 | 17.9 | 21.4 | 25.0 | 28.6 | 32.1 | 35.7 | 39.3 | 42.9 | 46.4 | 50.0 | 1/4″ BSP | 455 | 350 | 760 | 29 |
| DD-55 | 38.9 | 46.6 | 54.4 | 62.2 | 70.0 | 77.7 | 85.5 | 93.3 | 101.1 | 108.8 | 1/2″ BSP | 665 | 400 | 1320 | 110 |
| DD-85 | 60.4 | 72.4 | 84.5 | 96.6 | 108.6 | 120.7 | 132.8 | 144.9 | 156.9 | 169.0 | 1/2″ BSP | 690 | 450 | 1440 | 123 |
| DD-110 | 78.2 | 93.9 | 109.5 | 125.1 | 140.8 | 156.4 | 172.1 | 187.7 | 203.4 | 219.0 | 3/4″ FLANGE | 760 | 500 | 1685 | 158 |
| DD-170 | 120.7 | 144.9 | 169.0 | 193.1 | 217.3 | 241.4 | 265.6 | 289.7 | 313.9 | 338.0 | 1″ FLANGE | 945 | 620 | 1555 | 205 |
| DD-255 | 181.1 | 217.3 | 253.5 | 289.7 | 325.9 | 362.1 | 398.4 | 434.6 | 470.8 | 507.0 | 1″ FLANGE | 945 | 620 | 2000 | 250 |
| DD-340 | 241.4 | 289.7 | 338.0 | 386.3 | 434.6 | 482.9 | 531.1 | 579.4 | 627.7 | 676.0 | 1.1/2″ FLANGE | 1055 | 700 | 1940 | 335 |
| DD-425 | 301.8 | 362.1 | 422.5 | 482.9 | 543.2 | 603.6 | 663.9 | 724.3 | 784.6 | 845.0 | 1.1/2″ FLANGE | 1055 | 700 | 2220 | 380 |
| DD-555 | 394.7 | 473.7 | 552.6 | 631.6 | 710.5 | 789.5 | 868.4 | 947.4 | 1026.3 | 1105.3 | 1.1/2″ FLANGE | 1135 | 850 | 2110 | 460 |
| DD-680 | 482.9 | 579.4 | 676.0 | 772.6 | 869.1 | 965.7 | 1062.3 | 1158.9 | 1255.4 | 1352.0 | 2″ FLANGE | 1305 | 950 | 2250 | 645 |
| DD-850 | 603.6 | 724.3 | 845.0 | 965.7 | 1086.4 | 1207.1 | 1327.9 | 1448.6 | 1569.3 | 1690.0 | 2″ FLANGE | 1360 | 1200 | 2230 | 845 |
| DD-1100 | 784.6 | 941.6 | 1098.5 | 1255.4 | 1412.4 | 1569.3 | 1726.2 | 1883.1 | 2040.1 | 2197.0 | 2″ FLANGE | 1410 | 1250 | 2280 | 970 |
| DD-1235 | 877.6 | 1053.1 | 1228.6 | 1404.1 | 1579.7 | 1755.2 | 1930.7 | 2106.2 | 2281.7 | 2457.3 | 2.1/2″ FLANGE | 1660 | 1350 | 2500 | 1130 |
| DD-1400 | 994.7 | 1193.6 | 1392.6 | 1591.5 | 1790.4 | 1989.4 | 2188.3 | 2387.2 | 2586.2 | 2785.1 | 2.1/2″ FLANGE | 1660 | 1350 | 2690 | 1180 |
| DD-1520 | 1086.4 | 1303.7 | 1521.0 | 1738.3 | 1955.6 | 2172.9 | 2390.1 | 2607.4 | 2824.7 | 3042.0 | 2.1/2″ FLANGE | 1705 | 1350 | 2525 | 1270 |
| DD-1700 | 1207.1 | 1448.6 | 1690.0 | 1931.4 | 2172.9 | 2414.3 | 2655.7 | 2897.1 | 3138.6 | 3380.0 | 3″ FLANGE | 1875 | 1550 | 2740 | 1500 |
| DD-2030 | 1448.6 | 1738.3 | 2028.0 | 2317.7 | 2607.4 | 2897.1 | 3186.9 | 3476.6 | 3766.3 | 4056.0 | 3″ FLANGE | 1935 | 1550 | 2690 | 1675 |
Frequently Asked Questions
The EO Series Auto Drain Valve is an electronically operated valve that automatically discharges accumulated condensate from compressed air systems. It uses a built-in timer to operate the valve at preset intervals.
You can adjust the ON/OFF time intervals on site to meet specific condensate drainage requirements. This lets you configure the opening and closing cycle to suit different operating conditions.
The EO Series features direct-acting and fully automatic operation, along with a built-in solenoid valve and strainer. It is also designed for easy installation, maintenance-free operation, and reliable performance.
Delair’s EO Series provides a practical solution for automated condensate drainage in compressed air systems. Its electronically controlled, timer-based operation, durable construction, and easy installation make it suitable for reliable day-to-day operation.
The Delair EO Series auto drain valve operates on a 230 VAC / 1-phase / 50 Hz supply, at a working pressure of 0 to 10 kg/cm²(g) and a working temperature of 0 °C to 60 °C. It has a built-in solenoid valve and strainer, an adjustable timer, and is available in ¼” and ½” connection sizes for use on air receivers, filters, after-coolers, moisture separators, and air dryers.
