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Welcome to Artic Driers

How to select your dryer  

 

To achieve maintenance and reliability  with compressed air, one is invariably drawn to the realisation that  a compressed air dryers is “the” solution. Compressed air without a dryer and filter bank will be wet, oily, contaminated and will cause hours of hectically costly downtime.

WHAT IS A DRYER? it’s a box that contains heat exchangers, a Freon cooling system and a pair of externally  mounted filters before and after the box..  Its function in life is to  reduce the incoming air temperature to 3°C.    At 3°C the compressed condenses out the water and oils from a water / oil vapour into a liquid condensate.  These are entrained from atmosphere and from the compressor itself. This liquid waste is drained out of the dryer by automatic drains. This waste is toxic to our river systems,  please acquire a proper waste separation system that will allow clean water in the drains legally and retains the oil for proper disposal

SO ANY DRYER WILL DO, RIGHT?  No, not quite.  Dryers and the filters are sized for the heat load that they are required totx dryer treat. Heat load is made up of the volume of compressed air, the pressure and temperature that it enters the dryer at, as well as the ambient air temperature in the workshop or compressor room, and finally the dew point targeted. In this case we assume 3°C

Look carefully at the potential suppliers brochure it will show a number of tables that relate to the items above and it will show you  how to  de-rate a dryer for our hot African climates. If the tables are not shown, run and find a new air dryer supplier!  The chances of getting a dryer to work in Africa with de-rating flow rates down from our cooler cousins catalogues in the northern hemisphere  are next  to  zero.

Failure to  de-rate the dryer, especially in the hotter areas of our warm African country will lead to  hours of fantastic frustration and downtime L.  The dryer will trip and will not work or it will break components within the air dryer.  That’s not why you wanted to  buy a dryer, now was it?

The hotter the workshop or compressor room is the bigger and more pricy  the drier will beL

The cooler the environment, the smaller  the dryer will be and the price will go down J

HOW DO I KNOW WHAT AIR VOLUME I HAVE?  There are three ways to  establish the air volume.

  1. Ask the supplier for the FAD volume from your compressor at the working pressure that you  plan to work at.
  2. Measure the flow with a thermal mass meter. This can be done, but you  need to  contact us for this, or perform a receiver pump up  test!  Call us for the formula!
  3. Calculate the air volume based on the kW’s fitted to the air compressors main motor

 See the table below, it shows that amount of c/air that is delivered from the two different  types of compressors based on the kW’s fitted. It is a general guide, but will suffice for 90% of the applications.

FILTERS, WHO NEEDS THEM? Well most people actually.  The elements will need periodically need changing, yes, it will cost money, but the improvement in c/air quality is immense.  Filters remove the contamination generated by the compressor and released by old pipe systems . The pre filter will remove oils and particles, draining liquids to  waste & retaining particles from  the incoming air before the automatic drain inside the dryer is jammed with this airborne rubbishJ

A dryer with a jammed drain is a water generator, not a water remover!  The final filter will remove the final trace of oil and filter down to at least 0,1 micron and 0,01 mg/m³ of oil.   If you  have really great eyes, you  can only  see 40 micron at best.   So this level of filtration is very fine.   If necessary,  for touchy applications, you can add an activated carbon filter to “collect” out the final traces of oil vapours. Activated carbon filter remove down to 0.003 mg/m³.  

Filters are also sized on air flow and pressure, again read the sales literature and select the correct filter for you flow and pressure ratings.

 

selection spread sheet

 LOW COST RULES, RIGHT??  Well on rare occasions,  sometimes, it normally  rules when a blue moon is up!, Like most things in life,  you will get what you pay for.  Buying cheap will probably  lead to  drama later.  It’s better to go to the leaders in the air treatment industry.  Air treatment, by the way, is not necessarily the compressor supply chain.

Strangely enough  treatment companies will have more in depth knowledge of the compressor air treatment, than the guys in the compressor industry. J   Its two different trades…   Would you  buy a smart swanky  new BMW from your local  caravan dealer ????   

SERIOUSLY  NOW, having wound up  half my friends and maybe some enemies  in the compressed air trade for the last 40  years, they may well  place a contract on my  head for this flippant rendition of air dryer selections.

 The truth is that many  companies get the de-rate / selections wrong, or fail to  apply  them.  Many  supply  chains, have no  clue what  a de-rate factor is!  Or know the impact of pressure on the refrigeration drying process.   The impact of getting it wrong is huge, and when its wrong its wrong, there is no magic trick to rectify  an undersized air dryer of filter. You have to  get it right the first time.

 Look at the selection guides below they refer to  our model numbers operating at  different sirte conditions.  See high the flow volume drops when you  increase the temperatures!  The second chart shows you to  see the m³/min capacity from various compressor motor sizes 

Talk to  us if you need help, it’s cheaper to  talk  and ask questions than make a wrong air dryer selection!!

 

Click here to download Unit Converter (1MB)

 

ARTIC DRIERS PRODUCT RANGE
  • Air Treatment Equipment
  • Refrigeration Air Dryers
  • Pyramid Refrigeration Air Dryers 
  • Chemical Adsorption Air Dryers 
  • Blower Purge Chemical Air Dryers 
  • Heat Of Compression Chemical Air Dryers 
  • Membrane Air Dryers
  • Coalescing Filters 
  • Retrofit Filter Elements 
  • Particle Filters 
  • Water Separators 
  • Compressor Condensate Separators – Sepura 
  • Condensate Drains - Timed 
  • Condensate Drains - Float 
  • Condensate Drains - Capacitance Type 
  • Condensate Drains - Rotary Ball Valve 
  • Condensate Drain - Timers 
  • Desiccant Adsorption Media – Activated Alumina 
  • Desiccant Adsorption Media – Molecular Sieve
  • Desiccant Adsorption Media – Silica Gel 
  • Desiccant Adsorption Media – Activated Carbon 
  • Desiccant Adsorption Media – Dry-O-Lite
  • Air Dryer Service Department 
  • Air Dryer Rebuilds & Refurbishment 
  • Compressed Air Audit Department 
  • Ultrasonic Compressed Air Leak Detection Service 
  • Compressed Air Measurement Instruments 
  • Mobile Compressed Air Measurement Instruments Ds 300 
  • Compressed Air Dew Point Measurement 
  • Compressed Air Flow Measurement
  • Compressed Air Oil Carryover Measurement
  • Compressed Air Velocity Measurement 
  • Air Compressor Power Measurement 
  • Compressed Air Pipeline Design 
  • Compressed Air System Design
  • Compressed Air Silencers
  • Compressed Air Mufflers
  • Exhaust Silencers
  • Relief Valve Silencer
  • Vacuum Exhaust Silencer
  • Steam Exhaust Silencer
  • Air Damper

Brand Names we supply:
  • Bry-Air
  • Jemaco Flair
  • Chaumeca Iberica
  • SPX Dehydration
  • Bea Filters
  • Allied Witan
  • Shaw Moisture Meters
  • Sepura
  • Twin Tower Engineering
  • Jorc
  • Alwitco
  • CS iTEC