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How to deal with some problem of desicant air dryer (heatless type)
How to deal with some problem of desicant air dryer (heatless type)
Problem | Probable cause | Remedy |
Exessive backpressure in regeneration tower (Above 0,5 barg) | Silencer is clogged | Clean or replace silencer |
Presure gauge malfuntion | Check or replace pressure gauge | |
Depressurization fail | De-press valve & purge valve doesn’t open. | Check the de-press &purge and check its solenoid valve |
Silencer is clogged | Clean or replace silencer | |
Low pressure | Check control air pressure (above 5 barg) | |
Re-press fail | De-press & purge valve doesn’t close | Check the de-press & purge valve and check its solenoid valve |
Excessive press. Drop | Excessive flow rate | Check working pressure |
Low inlet pressure | Check line pressure | |
Tower change failure | No control air low control press. | Check control air line & control filter. |
Controller failure | Check the PLC or PCB controller | |
Elevated dew point | Insufficient purge air | Check purge pressure (nor. 30-3.5 barg) |
Silencer is clogged | Check or replace silencer | |
Low pressure | Check pressure source | |
High inlet temp | Reduce inlet temp.Check after-cooler or ref.dryer | |
Desiccant contaminated by oil | Install suitable pre-filter and replace desiccant | |
Water entering | Check after-cooler or ref.dryer. If nescessary replace desiccant. |
Minh Phu provides maintenance and repair services for air compressors, in addition Minh Phu also provides spare parts for air compressors with high quality at reasonable prices. For further information, please contact (+84)919 23 28 26. Sincerely thank you for your interest and your trust of our service.

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