How to deal with some problem of desicant air dryer (heatless type)

Tuesday - 30/07/2019 04:26

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.


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