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Dryers

Refrigerated type Compressed Air Dryer
As the temperature of air reduces, its water vapour holding capacity comes down drastically. This principle is employed in Refrigerated type dryers. Compressed air is cooled by refrigeration system thereby reducing its water vapour holding capacity. Water vapours above the holding capacity at reduced temperature condense into water droplets and are removed in water separator. The resultant compressed air becomes dry to pressure dew point equal to its reduced temperature (generally around+2°C to +8°C). As long as the temperature of compressed air, as it travels through the system does not fall below the dew point temperature produced in the dryer, no more water vapours will condense into troublesome liquid in downstream air lines.






Features:
Model Rated flow capacity Nm3/hr (cfm) (1) Inlet/Outlet connections Dimensions (mm)
Length Width Height
SR-025 25(42.5) ½" BSP 400 400 450
SR-055 55(93.5) ¾" BSP 550 490 750
SR-090 90(153) 1" BSP 550 490 750
SR-0600 1020(600) 3" BSP 800 750 1000
SR-0800 1360(800) 3" BSP 800 750 1000
SR-1000 1700(1000) 4" BSP 1250 1000 1500
SR-1200 2040(1200) 4" BSP 1250 1000 1500
SR-1500 2550(1500) 4" BSP 1250 1000 1500
SR-2000 3400(2000) 4" BSP 1250 1000 1500
SR-3000 5100(3000) 6" Flanged 1800 1200 1500
SR-4000 6800(4000) 6" Flanged 2200 1200 1500
SR-5000 8500(5000) 8" Flanged 2800 1400 1700
SR-6000 10200 (6000) 8" Flanged 3000 1800 2000
SR-7000 11900(7000) 8" Flanged 3200 1800 2100
SR-8000 13600(8000) 10" Flanged 3550 1800 2100
SR-9000 15300(9000) 10" Flanged 3950 1800 2100
SR-10000 17000(10000) 10" Flanged 4200 1800 2100
SR-12000 20400(12000) 12" Flanged 4200 1800 2100
SR-15000 25500(15000) 12" Flanged 4200 1800 2100
SR-20000 34000(20000) 14" Flanged 4200 2500 2800
SR-25000 42500(25000) 14" Flanged 5000 2500 2900
SR-30000 51000(30000) 16" Flanged 5000 2500 3200

  1. Rated flow capacity is based on compressed Air pressure of 7kg/cm2g, Inlet temp of 40°C and outlet pressure dew point of 2°C. For any change in pressure and dew point, ask for our sizing chart or consult our application Engineers.
  2. Dryers with higher maximum working pressure are available on request.
  3. Inlet/Outlet connections indicated are standard. For any different connections, please specify.
  4. Flanged connections shall be as per ANSI 150#RF.

HTD DRYER SERIES
Salient Features:
MODEL SELECTION CHART HTD-STD DRYER SERIES
Model Rated Flow (cfm) Inlet / outlet connections Dimensions (mm)
Length Width Height
SR-135-AC-HTD 135 1" BSP 650 550 1025
SR-200-AC-HTD 200 1½" BSP 650 550 1025
SR-270-AC-HTD 270 2" BSP 750 650 1200
SR-400-AC-HTD 400 2" BSP 750 650 1200


Heatless type Dessicant Dryers
For applications requiring much lower dew points than +2°C, dessicant based compressed air dryers are preferred. The compressed Air gets dried by passing through a packed bed of dessicant, which adsorbs water vapours. After a fixed time, the compressed air stream is directed through another packed bed of dessicant while dessicant in first bed is regenerated. The drying and regeneration continues in cyclic manner. There are various methods of regeneration leading to various designs in dessicant dryers. Dew points as low as these dryers can achieve -40°C to -80°C. Directed through another packed bed of dessicant while dessicant in first bed is regenerated. The drying and regeneration continues in cyclic manner. There are various methods of regeneration leading to various designs in dessicant dryers. Dew points as low as these dryers can achieve -40°C to -80°C.

Regeneration in these dryers is carried out be expanding a portion of dry air to near atmospheric pressure and purging the other dessicant bed. The moisture is removed and dessicant regenerated. It is now ready for drying of air once again. Purge air loss is main disadvantage in these dryers.


Salient Features:
Model Rated flow capacity Nm3/hr (cfm) (1) Maximum working Pressure (Kg/cm2g) (2) Inlet / Outlet Connections (3) (4) Dimensions (mm) Weight (Kg)
Length Width Height
SDI-015 25(15) 12 1/2" Flanged 525 400 750 80
SDI-025 42(25) 12 1/2" Flanged 550 450 1000 165
SDI-040 68(40) 12 1/2" Flanged 650 500 1000 210
SDI-060 102(60) 12 1/2" Flanged 700 500 1000 250
SDI-100 170(100) 12 1" Flanged 900 600 1250 445
SDI-150 255(150) 12 1 1/2" Flanged 1000 650 1400 510
SDI-200 340(200) 12 2" Flanged 1100 800 1600 550
SDI-300 510(300) 12 2" Flanged 1200 900 1600 700

  1. Rated flow capacity is for a 5+5 minute cycle dryer having -40°C dew point operating at 7 kg/cm2g. For any change in pressure & dew point, ask for our sizing chart for heatless dryers or consult our application engineers.
  2. Dryers with higher maximum working pressure are available on request.
  3. For any different end connections, please specify. Flanged connections shall be as per ANSI 150#RF.
  4. Models specified above are floor mounted. Wall mounted models are available upto 42 Nm3/hr(25 cfm).
  5. Heatless dryers with rated capacities above 510 Nm3/hr (300 cfm) are available on request.

OTHER DRYERS
HEAT OF COMPRESSION TYPE DESICCANT AIR DRYER
Hot & wet compressed air from air compressor is directly supplied to dryer. The air being hot is used to regenerate dryer tower under regeneration. Thereafter air is cooled in an inter cooler. Moisture in inlet compressed air as also moisture carried away by air during regeneration of Tower is separated in moisture separator.Compressed is now dried by passing through other tower where air is dried. After a fixed time, through actuation of control valve, Air instead of passing directly through absorber bed is passed through inter cooler, gets cooled, cools dryer bed in regeneration and is again cooled in second inter cooler and finally gets dried in tower under drying cycle. The dryer is completely automatic.

NO LOSS SPLIT FLOW TYPE DESICCANT AIR DRYER
The wet compressed air passes through the tower under adsorption. The desiccant adsorbs the moisture and air leaving the tower is available dry for the specific duty. Reactivation is being carried out by a part of the wet air, which is being purged through distributor. This is then heated in the heater and passed through the bed. The bed gets heated to regeneration temperature and the moisture is desorbed. The moisture is carried away by air, which is then condensed in the reactivation air cooler and separated in the moisture separator. This cooled air is then mixed with the remaining compressed air in the distributor before it enters the tower under adsorption. The dryer is completely automatic.

BLOWER REACTIVATED TYPE DESICCANT AIR DRYER
Wet air enters absorber tower where moisture in air is removed. Dry compressed air comes out from dryer other absorbed tower gets regenerated by heater blower generated air.The hot blower air with moisture is exhausted through exhaust valves. After a fixed time, the heater stops but blower remains on. Blower air now cools the desiccant bed for a fixed time thereafter blower also stops & tower is allowed to cool in idling condition. The dryer is completely automatic.

BLOWER PURGE TYPE DESSICANT AIR DRYER
This type of dryer is similar to blower reactivated type dryer. However, here 98% of regeneration is carried out by blowing hot air from blower through saturated dissident bed followed by purging with very small quantity of dry air. The dryer is completely automatic.

INTERNAL HEATED TYPE COMPRESSED AIR DRYER
Wet air enters absorber tower where moisture in air is removed. Dry compressed air comes out from dryer. Other absorber tower gets regenerated by dry purge air (approx. 3%-5% of inlet air quantity) coming through tapping from first tower. In both towers, internal heaters are embedded which become on in the tower under regeneration. Purge air from tower under drying which is already dry gets super dry by becoming hot in tower under regeneration. The dry & hot purge air carries away moisture from the tower and exhaust the same through exhaust valves. The dryer is completely automatic.