Compressor Pressure VS Airflow

 

I want to share with you a little bit about pressure and flow rate when it comes to the operation of the Super Dragin Pump.  Some of the most common questions we get asked about compressors are:

  • My Compressor is 120PSI… will that power a Super Dragin?
  • My Compressor has a 120 gallon (454L) tank…will that work?
  • Will the pump run on less air then shown in the specs?
  • If I have a larger compressor then required will I get more performance out of the Super Dragin Pump?
  • Does it need to be a special compressor?

To help answers these questions let me quickly say that while pressure is important air flow capacity is king when it comes to the performance of Super Dragin Pump.  Without the correct air flow supply to the Super Dragin Pump its performance will be reduced greatly. 

While most compressor will output at least 100PSI the amount of airflow it can output varies depending on the power and size of the compressor.  This air flow capacity  is commonly called the FREE AIR DELIVERY capacity. It pretty much just means how much air the compressor can constantly delivered without any drop in pressure. 

Here are five example of compressors. While all five of these compressors have the ability to output almost the same pressure there is quite a large difference between the free air delivery capacity.

12V Compressor

 FREE AIR DELIVERY is only 1.77 CFM @ 90PSI  

Will not run any Model

2.5HP compressor

Single Phase – 2.5HP Compressor with 50L Air Tank 

FREE AIR DELIVERY is  9 CFM @ 100PSI

Will run the Super Dragin mini with reduced vacuum performance.

Petrol – 9HP Compressor with 5L Air Tank

FREE AIR DELIVERY is  19.2 CFM @ 100PSI

Will run the Super Dragin Pump mini 

Three Phase – 10HP Compressor  with 160L Air Tank

FREE AIR DELIVERY is  30 CFM @ 100PSI

Will run any Model of Super Dragin

Air Compressor

Petrol – 14HP Compressor with 15L Air Tank

FREE AIR DELIVERY is  30 CFM @ 100PSI

Will run any Model of Super Dragin

 

Let me now get back to answering the questions we normally get asked about compressors.

1. My Compressor is 120PSI… will that power a Super Dragin?

Yes, but only if the FREE AIR DELIVERY of the compressor matches the requirement of the Super Dragin Models .

2. My Compressor has a 120 gallon (454L) tank…will that work?

 While tank size will play a part in the ability to delivery airflow it is only a temporary role.  Here is an example… The 12V compressor and the 10HP electric compressor (above) could both be connected to 454L tanks and would both be capable of pressuring the taken to the same pressure. However, once the Super Dragin Pump was activated only the 10HP compressor would be capable of filling the tank at the same rate as it emptied allowing constant airflow and pressure to be delivered to the Super Dragin. The tank that the 12V compressor was connected to would drain out quickly causing a reduction of airflow and pressure supply to the Super Dragin reducing its performance  significantly.

3. Will the pump run on less air then shown in the specs?

NO. Much like an aeroplane wing requires enough airflow to allow a plane to fly the Super Dragin Pump also requires enough airflow to allow it to create vacuum and perform correctly.

4. If I have a larger compressor then required will I get more performance out of the Super Dragin Pump?

The Super Dragin Pumps can only consume a specific amount of air (Mini = 17.5 CFM @ 100PSI, Plus = 30CFM @ 100PSI). If a Super Dragin Pump mini is connect to a 1000 CFM compressor it will still only consume 17.5 CFM @ 100PSI)

5. Does it need to be a special compressor?

No special compressor is required. As long as the compressor’s FREE AIR DELIVERY matches that of the Super Dragin Pump model then it can be used.