CompAir strives to provide its customers with more than just great compressed air products. We work hard to provide our customers with the resources they need to understand the solution that best fits their compressed air needs. Click on the links below to find out more about the compressed air industry.
Compressed Air is often described as the fourth utility, although not as ubiquitous as electricity, petrol and gas,
it plays a fundamental part in the modern world. The main difference is
that users generate their own air and so have a choice in the way that
air is generated.
The importance of compressed air is often over looked, but in reality it plays a vital part in most modern manufacturing processes and modern civilisation. Although we may not realize it most products we use today could simply not be made without compressed air. Compressed air accounts for about 10% of the global energy used in industry today.
With so many applications in different environments being dependant on compressed air, the compressors not only have to compress the air to a specific pressure, at a certain flow, it has to deliver air of the right quality. To most people, a compressor is all that is required to compress air, but to obtain the right quality of the compressed air, more equipment is often needed. Filters and dryers are often needed to remove oil and water before it reaches the application. CompAir has a range of completely oil-less compressors where air comes into contact with the process it serves and so the quality is critical, for example in where a compressor may be used in a food packaging role.
Compressed Air is clean, safe, simple and efficient. There are no dangerous exhaust fumes or other harmful by products when compressed air is used as a utility. It is a non-combustible, non-polluting utility.
When air at atmospheric pressure is mechanically compressed by a compressor, the transformation of air at 1 bar (atmospheric pressure) into air at higher pressure (up to 414 bar) is determined by the laws of thermodynamics. They state that an increase in pressure equals a rise in heat and compressing air creates a proportional increase in heat. Boyle's law explains that if a volume of a gas (air) halves during compression, then the pressure is doubled. Charles' law states that the volume of a gas changes in direct proportion to the temperature. These laws explain that pressure, volume and temperature are proportional, change one variable and one or two of the others will also change, according to this equation:
|(P1 V1)/ T1 = (P2 V2)/T2 Where P=Pressure V=Volume and T=Temperature of the gas, 1 being an initial state before a change, 2 being final state after a change.|
When applying this to a compressor, air volume (or flow) and air pressure can be controlled and increased to a level that suits the way it is being used. Compressed air is normally used in pressure ranges from 1 to 414 bar (14 to 6004 PSI) at various flow rates from as little as 0.1m3 (3.5 CFM - cubic feet per minute) and up.
The screw compressor is a displacement compressor with pistons in a screw format; this is the predominant compressor type in use today. The screw compression element main parts comprise male and female rotors that move towards each other while the volume between them and the housing decreases. The pressure ratio of a screw is dependent on the length and profile of the screw and of the form of the discharge port.
The screw element is not equipped with any valves and there are no mechanical forces to create any imbalance. It can therefore work at high shaft speed and combine a large flow rate with small exterior dimensions.
CompAir's Rotary Screw range operates between 4kw to 250 kW (5 to 335hp), producing working pressure at 5 bar to 13 bar (72 to 188psi).
Typical types of applications:
Food Beverage, Brewing, Military, Aerospace, Automotive, Industrial, Electronic, Manufacturing, Petrochemical, Medical, Hospital, Pharmaceutical, Instrument air
Air is a colorless, odorless, tasteless mixture of many gases, primarily nitrogen and oxygen. Air is naturally contaminated with solid particles, such as dust, sand, soot and salt crystals. This contamination varies with differing environments and altitude.
Water vapor is another natural ingredient which can be found in variable amounts in the air. The amount of water vapor and contamination of the air plays a vital role in the compression process and in the quality of the air delivered by the compressor.
The damaging and corrosive properties of water are well known. Untreated air at atmospheric pressure contains large amounts of water and other contaminants such as oil droplets and dirt particles.
When the air is compressed the concentration of moisture and other contaminants increases. If allowed to remain in the system this corrosive mixture has a detrimental effect on pneumatic equipment, causing unnecessary production downtime, product spoilage and reduced equipment life.
Compressed air filters remove the oil and dirt content while compressed air dryers remove water vapor before air reaches the point of use.