Marshall Brewson offer a complete range of reciprocating type compressors from small automotive workshop compressors up to industrial booster units. With many specialised application options. The following options are some of the application we can provide:
- Dental air
- Low noise units
- Portable (Electrical/Petrol/Diesel)
- High pressure units
- Breathing air
- Oil free
- High pressure booster units
- Medical air
- Workshop automotive
For more information please contact us to discuss your requirements
What is the difference between FAD and Displacement?
To the uninitiated or first-time buyer of an air compressor, getting an understanding of the specification of each model can be tricky. For one thing, there are so many different terms and abbreviations involved.
Two terms that you’ll often see applied to a reciprocating air compressor are within the volume flow – Displacement & Free air Delivery (FAD). So, the inevitable questions are: what do these terms mean and what is the difference?
Displacement (Theoretical) measurements refer solely to the nominal capability of an air compressor’s pump – in other words, the actual volume of air the pump can displace (draw into the compressor) per minute. This figure is based upon the size of the pump’s cylinders and the speed at which the pump operates. Displacement should not be used as an indicator of an air compressors’ ability to run a particular air tool or its suitability to perform a certain task.
Free Air Delivery FAD (Actually Delivered) is a far more useful measurement when determining the ‘power’ of an air compressor i.e. it’s suitability for use with air tools etc. FAD stands for Free Air Delivery, and this is the volume of compressed air that an air compressor will actually discharge as a result of the compression process.
FAD is typically a third less than Displacement (but it can be more). In other words, the volume of compressed air actually delivered is approximately a third lower than the volume of atmospheric air that an air compressor is capable of displacing. For example if your compressor is 10 CFM (Displacement) then the CFM (FAD) in reality will be about 6.5 CFM