PEHB series is used in various fields such as food & beverage, pharmaceuticals, petrochemicals, electronics & semiconductor and medicine

GSA’s desiccant air dryer is able to provide even super-dry compressed air according to user needs

PEHB Desiccant Air Dryer Series

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, air is sucked in from the outside, using a blower. Then, it is heated through a heater, heating the desiccant in the regeneration
tower. After moisture is removed, it is discharged to the outside through a muffler at the bottom of the regeneration tower. Once the heating process is complete, a cooling process begins. The heated descant is cooled down, using a part of the dry compressed air from the drying tower. Then, it is discharged to the outside through a muffler at the bottom of the regeneration tower. Once the cooling process is completed, the desiccant regeneration process from the regeneration tower is also finished. The purge valve from the regeneration tower is
closed. 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 according to specific time and sequence, producing dry air consecutively. In terms of an operating cycle, it is basically operated for 8 hours. Drying process is executed by two towers (4 hours each). Specifically, itis heated for 2 hours and 30 minutes and cooled for 1 hour and 27 minutes with 3-minute dynamic pressure.

Desiccant Air Dryer for Stable Dew Points

Desiccant Air Dryer with Diverse Features

PEHB num
  1. PAN/DUAL Check Valve

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

  2. Control Air Filter

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

  3. Minimization of Purge Air Loss

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

  4. SAFETY VALVE

    Ensures safety with KOSHA-certified safety valves

  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. Electric Heater

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

  9. High-quality Ring Blower

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

  10. High-quality Muffler

    Minimizes noise from the purge with an Allied Witan’s muffler

  11. Highly Reliable Auto Valve

    Proven angle sheet and butterfly valves used

  12. PARKER Pneumatic Solenoid Valve

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

  13. 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 biggerthan those stated in the specifications above are also customizable.
  • The specifications are subjectto changes without notice for productimprovement.
pehb size
*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
P
E
H
B
100 FLG. 20A 160 20 2.0 0.75 220V/380V
440V

1Ph/3Ph

50/60Hz
1000 420 1570 60 290
150 FLG. 25A 240 30 3.0 0.75 1400 510 1690 97 350
200 FLG. 40A 320 40 3.5 0.75 1600 850 1770 121 520
285 FLG. 40A 450 50 5.0 1.5 1600 850 1770 160 570
350 FLG. 40A 550 60 6.5 1.5 1900 880 2030 213 830
430 FLG. 40A 680 75 7.5 1.5 1900 900 2030 266 940
560 FLG. 50A 890 100 9.5 1.75 2100 1000 2230 324 1180
720 FLG. 50A 1140 130 12.5 2.55 2100 1000 2230 406 1430
900 FLG. 65A 1430 150 15.0 2.55 2600 1250 2400 500 1650
1100 FLG. 65A 1740 175 18.5 4.5 2600 1250 2400 593 1970
1350 FLG. 80A 2140 200 22.5 4.5 2600 1670 2330 754 2490
1550 FLG. 80A 2450 250 26.0 4.5 2600 1710 2330 943 2880
2100 FLG. 100A 3320 300 35.0 8.6 3100 1650 2445 1243 3750
2600 FLG. 100A 4120 400 43.0 8.6 3400 1970 2290 1442 4100
3000 FLG. 125A 4750 500 49.0 12.6 3550 1970 2290 1620 4700
3400 FLG. 125A 5380 600 56.0 12.6 3650 2140 2530 1883 5150
4100 FLG. 125A 6490 700 68.0 15.3 3650 2180 2530 2310 5450
4500 FLG. 150A 7120 800 75.0 15.3 5700 2100 2960 2494 5800
5400 FLG. 150A 8550 900 88.5 22.7 5700 2100 2690 3055 6450
6000 FLG. 150A 9500 1000 99.5 22.7 6000 2150 3000 3325 7250

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