PHL 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

PHL Desiccan 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. During the regeneration process, dry compressed air from the drying tower is partially used. The dry compressed air is discharged to the outside through a muffler at the bottom of the regeneration tower after moisture adsorbed into the desiccant is removed. Once the regeneration tower process is complete, 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 10 minutes. Drying process is executed by two towers (5 minutes each). Specifically, it is regenerated for 4 minutes with 1 minute dynamic pressure.

operating mechanism

Desiccant Air Dryer for Stable Dew Points

Desiccant Air Dryer with Diverse Features

PEH series
  1. Minimization of Purge Air Loss

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

  2. TEFLON CHECK Valve

    Noise minimized with TEFLON check valves

  3. SAFETY VALVE

    Ensures safety with KOSHA-certified safety valves

  4. High-quality Pressure Gauge

    High performances and low faults with highly reliable pressure gauges including WIKA products

  5. CONTROL AIR FILTER

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

  6. Precise Processing Time Control

    Able to set drying/dynamic pressure time to seconds; efficient operation enabled by controlling processing time depending on operating conditions

  7. PARKER Pneumatic Solenoid Valve

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

  8. High-quality Desiccant

    Stabledewpointswith high-quality active alumina including those with 0.42ml/g or higher porosity

  9. 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

  10. Highly Reliable Auto Valve

    Proven angle sheet and butterfly valves used

  11. High-quality Muffler

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

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 barg

References

  • Those with - 40℃ or below dew points are also customizable.
  • ASME specifications in addition to KS are also customizable.
  • A unit with 9.7barg or higher operating pressure is custom-made.
  • Special-purpose models in addition to the proposed specifications are also customizable.
  • The specifications are subject to changes without notice for product improvement.
peh size
*Note 1: Desiccant Amount of 2 Towers / *Note 2: Total Weight
Model Connection Flow Rate Power Consumption Power Supply Dimensions (mm) Desiccant Amount
*Note 1
Weight
*Note 2
A N㎥/hr W V / Ph / Hz A B C kg/2Tower kg
S
H
L
5 PT 15A 10 50 220 / 1 / 60 500 225 745 3 23
10 PT 15A 20 500 225 745 4 27
15 PT 15A 25 500 225 745 7 36
20 PT 15A 35 500 225 745 10 46
P
H
L
25 PT 20A 45 840 305 1010 15 102
50 PT 20A 85 840 305 1535 25 136
75 PT 20A 130 1150 435 1665 40 160
100 PT 25A 170 1150 435 1870 50 250
125 PT 25A 215 1150 435 1870 60 260
150 PT 25A 255 1150 435 1870 65 272
200 PT 40A 340 1150 485 1865 90 306
250 PT 40A 425 1270 550 1800 125 405
350 PT 40A 595 1270 585 1870 175 473
500 PT 50A 870 1400 670 2090 250 650
650 PT 50A 1110 1400 670 2350 325 720
800 PT 65A 1360 1500 1100 2600 400 900
1000 FLG. 80A 1700 1500 1100 2610 500 1125
1200 FLG. 80A 2040 1800 940 2390 595 1305
1400 FLG. 80A 2380 1800 940 2750 700 1575
1600 FLG. 100A 2720 2000 1000 2900 800 1755
1800 FLG. 100A 3060 2000 1000 2900 860 2205
2000 FLG. 100A 3400 2000 1110 2900 1000 2340

Correction Factors

Correction Factor by Inlet Air Temperature
Inlet Air Temperature (℃) 25 30 38 45 50 N/A N/A N/A N/A N/A N/A N/A
Correction Factor 1.12 1.05 1.00 0.7 0.55 N/A N/A N/A N/A N/A N/A N/A
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 0.72 0.87 1.00 1.1 1.15 N/A N/A N/A N/A N/A N/A
Certification mark