The Air Compressor Buyer's Guide for UAE

Start by determining the maximum pressure you need to operate your tools or machines, or to run your processes. Depending on the pressure you might need a single-stage (9 bar max) or multi-stage compressor (400 bar max).

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Find out the flow rate you will require. The flow rate is the maximum volume of air that must move through your entire system per minute or per second. This will be measured in cubic feet per minute, liters per second, or cubic meters per hour. Include a safety margin of about 30%.

So for example for applications that require pressures of up to 10 bar with flow rates up to 4000 m3/h, screw compressors are the best fit. For larger flow rates requirements centrifugal compressors would be more economical. For high pressure requirements, say 14 bar to about 300 bar, reciprocating air compressors or piston compressors will be best because of their energy efficiency.

Intermittent duty-cycles require a compressor that is energy efficient in that scenario. You might even want a compressor that will adapt to an increased workload because you plan to expand your facility soon. Knowing if your compressed air demand is continuous or intermittent, or a mix between, will help you decide. You could benefit from a fixed speed or variable speed drive compressor. Identifying the correct compressor air regulation will save you a huge amount of energy over the lifetime of your compressor.

And finally consider the usage, configuration, and space limitations you might have. You might want something that is easily moveable, or fully portable. You might have ample room to spare and be fine with something that is stationary but prefer it to be as quiet as possible.

Once you’ve become clear on your requirements then it’s a matter of reviewing the spec sheets of air compressors and finding one that meets the criteria. This is where you will benefit from the knowledge of experts who can review your facility and guide your decision. Some air compressor manufacturers offer free audits to help customers make the right choice.

Do your prep: good planning

Before purchasing an air compressor, a range of figures and facts need to be established for the entire compressed air network. These include the compressed air demand (current and in the foreseeable future), the required compressed air quality and whether the waste heat from the compressor is used for another operational process, like heating the factory. If the compressor is being added to an existing station, then you also need to consider integration into the control technology.

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It is generally advisable to measure the compressed air demand over a period of time to determine a requirement profile for which the compressor or compressors can be selected.

Air Audit

Compressed air audits are an effective way to identify your current energy use and to assess your compressed air needs.

How do I audit my compressed air?

Air audits can be as simple or as comprehensive as you require. A data-logging unit is attached to each compressor in your network for a fixed period of time. The results from the audit can then be used to analyse your air pressure requirements, power consumption and flow rate.

Our engineers can then provide recommendations that will help you to select the right size and mix of fixed and regulated-speed compressors. The compressed air audit may also identify if you need to switch to a new, more efficient machine, carry out further network improvements or pipework upgrades or if your compressor requires better control. We can then advise on any improvements that you can make to your network to help reduce leaks and save money.

As well as carrying out an audit of your compressed air system, you should also include regular checks for air leaks in your maintenance routines too.

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