GSA's compressed air treating equipment turning Top air quality

With our high technology, perfect quality and prompt after-sale service, we are supplying our products all over the world

Why Desiccant Air Dryer?

A refrigerated air dryer chills and dehumidifies compressed air, using a refrigerant. To prevent condensate generated while cooling compressed air from being frozen or a heat exchanger from being frozen-burst, dew points are usually kept at 0℃ or higher. For moisture-sensitive processes, therefore, a desiccant air dryer is essential.

In general, a desiccant air dryer offers -40℃ or lower temperature of dew points. It is used in various fields such as food & beverage, pharmaceuticals, petrochemicals, electronics & semiconductor and medicine. In these industries, even a small amount of water might result in process discontinuance or product defect. Therefore, a highly reliable desiccant air dryer is a must-have system.

GSA’s desiccant air dryer is able to provide even super-dry compressed air (-100℃ or below) according to user needs. We have enhanced customer satisfaction through the design of diverse desiccant air dryer systems.

Classification

  • A commonly used model with a short process cycle (nearly 10 minutes)
  • Simple structure and low power consumption
  • About 14% purge consumption
  • A model with a long process cycle (8 hours orlonger)
  • A heater needed to heat regeneration air mounted
  • About 8% purge consumption
  • A model with a long process cycle (8 hours orlonger)
  • Regenerates a desiccant, using air around the blower and heaterfurnace
  • About 3% purge consumption
  • A model with a long process cycle (8 hours orlonger)
  • Regenerates a desiccant, using air around the blower and heaterfurnace
  • Zero purge consumption

Operating Mechanism

Compressed air with high moisture flows into the drying tower. While it moves from the bottom to the top of the tower, moisture is adsorbed by the charged desiccant, producing dry compressed air. While the air is being dried in the drying tower, other towers engage in regeneration process to remove adsorbed moisture. The regeneration process is divided into heating and cooling processes. During the former process, the air sucked in from the outside by a blower is heated up to the set temperature through an electrical heater. After moisture is removed, the heated regeneration air is discharged to the outside through a muffler at the bottom of the regeneration tower. Once the heating process is complete, the cooling process needed to cool down the heated desiccant in the regeneration tower begins. The cooling process is divided into ZEHB Type which cools down the desiccant, using the ambient air sucked by a bower and ZEHC Type that cools off the desiccant with coolant by circulating regeneration air.

Once the cooling process is done, the desiccant regeneration process is also finished. Then, dynamic pressure process pressurizing regeneration tower starts. Once the dynamic pressure process is done, two towers are transferred. In the drying tower, then, the regeneration process is executed. In the towers where such regeneration process is completed, drying process is executed. A series of above processes are automatically repeated, providing dry compressed air.

In a zero-purge desiccant air dryer, the air compressor’s load factor is low without any purge which is consumed during desiccant regeneration. Depending on the adsorption tower’s regeneration temperature, diverse heating process control features are added, reducing power consumption (energy-saving model).

Desiccant Air Dryer for Stable Dew Points

Desiccant Air Dryer with Diverse Features

  1. PAN/DUAL Check Valve

    High-performance PAN/dual check valves with a little chance of breakdown used

  2. Minimization of Purge Air Loss

    Minimizes compressed air loss through accurately calculated orifice caliber and precision processing

  3. SAFETY VALVE

    Ensures safety with KOSHA-certified safety valves

  4. CONTROL AIR FILTER

    A control-purpose compressed air filter installed to prevent valves and pneumatic solenoid valves from malfunctioning

  5. High-quality Desiccant

    Stable dew points with high-quality active alumina including FRANCE AXENS

  6. High-quality Pressure & Temperature Gauges

    High performances and low faults with highly reliable pressure and temperature gauges

  7. PLC and Touchpanel

    A touchpanel designed for PLC and user convenience applied; able to operate and get diverse information easily

  8. High-quality Ring Blower

    Low noise and law faults despite long operation with a high-quality ring blower

  9. Electric Heater

    An immersion heater with very low heat loss and great heating performances used

  10. PARKER Pneumatic Solenoid Valve

    Able to check operating conditions easily, using PARKER’s LED pneumatic solenoid valve

  11. Power Regulator (Specifications Applied)

    Able to control a heater efficiently through this power regulator and reduce power consumption

  12. High-quality Muffler

    Minimizes noise from the purge with an Allied Witan’s or specially designed (large model) muffler

  13. Highly Reliable Auto Valve

    Proven angle sheet and butterfly valves used

  14. Efficient Compressed Air Distribution System

    A bottom distributor installed to prevent the bias flow of compressed air in a large adsorption tower and provide stable dew points

Technical Specification

Design Conditions

  • Inlet Pressure : 7 barg
  • Inlet Temperature : 38 ℃
  • Dew Points : -40 ℃ @ ATM
  • Design Temperature : 250 ℃
  • Design Pressure : 9.7 barg
  • Differential Pressure : 0.2 bar

References

  • Those with - 40℃ or below dew points are also customizable.
  • ASME specifications in addition to KS are also customizable.
  • A unit with 9.8barg or higher operating pressure is custom-made.
  • Special-purpose models in addition to the proposed specifications are also customizable.
  • Large models bigger than those stated in the specifications above are also customizable.
  • The specifications are subject to changes without notice for product improvement.
*Note 1: Desiccant Amount of 2 Towers / *Note 2: Total Weight
Model Connection Flow Rate Air Compressor Heater Blower Power Supply Dimensions (mm) Desiccant Amount *N
*Note 1
Weight
*Note 2
A N㎥/hr HP kW kW V / Ph / Hz A B C kg/2Tower kg
Z
E
H
B
430 FLG. 40A 680 75 8.5 1.5 220V/380V
440V

3Ph

50/60Hz
1900 900 2030 324 1440
560 FLG. 50A 890 100 11.0 1.75 2100 1000 2230 406 1700
720 FLG. 50A 1140 130 14.0 2.55 2100 1000 2230 474 2060
900 FLG. 65A 1430 150 17.5 2.55 2600 1250 2400 592 2200
1100 FLG. 65A 1740 175 21.5 4.5 2600 1250 2400 755 2470
1350 FLG. 80A 2140 200 26.5 4.5 2600 1670 2330 943 2690
1550 FLG. 80A 2450 250 30.0 4.5 2600 1710 2330 1,022 3100
2100 FLG. 100A 3320 300 41.0 8.6 3100 1650 2445 1,384 4090
2600 FLG. 100A 4120 400 50.5 8.6 3400 1970 2290 1,848 4700
3000 FLG. 125A 4750 500 58.5 12.6 3550 1970 2290 1,980 5860
3400 FLG. 125A 5380 600 66.0 12.6 3650 2140 2530 2,272 7400
4100 FLG. 125A 6490 700 80.0 15.3 3650 2180 2530 2,707 8200
4500 FLG. 150A 7120 800 87.5 22.7 5700 2100 2960 3,055 9600
5400 FLG. 150A 8550 900 105.0 22.7 5700 2100 2960 3,566 11400
6000 FLG. 150A 9500 1000 117.0 22.7 6000 2150 3000 4,052 12300
7000 FLG. 200A 11080 1200 136.0 25.2 7000 2200 3500 4,621 13500
8000 FLG. 200A 12660 1300 155.5 30.6 7000 2500 3700 5,279 14700
9000 FLG. 200A 14520 1600 1750.0 37.0 7000 2500 3700 5,942 15600

Correction Factors

Correction Factor by Inlet Air Temperature
Inlet Air Temperature (℃) 27 32 38 43 49
Correction Factor 1.14 1.12 1.00 0.75 0.65
Correction Factor by Inlet Air Pressure
Inlet Air Pressure (barg) 4 5 6 7 8 9 N/A N/A N/A N/A N/A N/A
Correction Factor 0.6 0.75 0.87 1.00 1.16 1.24 N/A N/A N/A N/A N/A N/A
Certification mark
GSA_logo_Since_1993

Desiccant Air Dryer