Help

Help to Choose a Compressed Air Refrigeration Dryer
Compressed air refrigeration dryers are selected according to the flow rate of your compressed air system. If you’re not sure what size Compressed Air Refrigeration Dryer you need, here is some help…

1 – To Replace an Existing Compressed Air Dryer
Have a look on the back of your existing refrigeration dryer. There you should see an identification plate showing the model number and other information. This often gives you the flow rate capability and operating pressures.

2 – To Select a New Compressed Air Dryer
If there is no existing compressed air refrigeration dryer installed, the size required should match the outlet flow rate of your compressor.

If you know the flow rate of your compressor, use this figure to select the required dryer.

If you don’t know the flow rate of your compressor, have a look on the back it. There you should see an Identification plate showing the model number and other information. This often gives you the outlet flow rate, power and operating pressures.

Flow rates may be in:

Nm3/Hr (normal cubic meters per minute)
L/min or L/hr (Litres per minute/hour)
or
SCFM (Standard Cubic Feet per Minute)

Pressure may be in:

Barg (Bar Guage)
PSIG (Pounds per Square Inch)

Please note:
The flow rates shown for IATT Compressed Air Refrigeration Dryers are at the following Standard Reference Conditions:

Working pressure: 7 barg (101 psig) *
Ambient temperature: 25°C (45° max)
Inlet air temperature: 35°C (55° max)
Dew point: 3°

* If your compressor operates at a higher pressure, please contact us for advice:

Telephone: 0191 477 0060 or email us at: info@iatt.co.uk

Outlet Pipe Connections

Often the pipe connection on a compressor outlet, the pipework and/or the compressed air dryer is sized optimally to accommodate the outlet flow rate. The larger the pipe diameter, the higher the flow rate.

The following BSP (British Standard Pipe) pipes sizes will help in generally selecting which Compressed Air Refrigeration Dryer to select from our range.

bsp-pipe-diameters-diagram