Nils & Abbas is a master CompAir Distributor for all their products including Reavell, BroomWade, Hydrovane and MAKO. With the broadest range of products on the market today, we can offer complete air packages ranging from 2 HP - 500 HP and pressures up to 6000 PSI built to suit the needs of any system. We also offer a complete line of Reciprocating 2 stage compressor which covers the volume range from 20 to 100 cfm at 60 to 250 psi
Compressed Air Explained

Compressed Air is cleansafesimple 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:


what happens when we compress air piston image

(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.

Rotary Screw

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.

Compression capabilities:
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 

Piston Compressor

The piston compressor is one of the earliest compressor designs, but it remains the most versatile and is still a very efficient compressor. The piston compressor moves a piston forward in a cylinder via a connecting rod and crankshaft. If only one side of the piston is used for compression, it is described as single acting. If both sides of the piston, top and underside are employed, it is double acting.

The versatility of the piston compressors knows virtually no limits. It compresses both air and gases with very little alterations. The piston compressor is the only design capable of compressing air and gas to high pressures, such as breathing air applications.

The configuration of a piston compressor can be a single cylinder for low pressure/low volume to a multi-stage configuration cable of compressing to very high pressure. In these compressors, air is compressed in stages, increasing the pressure before entering into the next stage to compress the air into even higher pressure.

Compression capabilities:
CompAir's Piston range operates between 0.75 kW to 420 kW (1hp to 563hp) producing working pressure at 1.5 bar to 414 bar (21 to 6004psi).

Typical types of applications:
Gas compression (CNG, Nitrogen, Inert gas, Landfill gas), High Pressure (Breathing air for SCUBA SCBA cylinders, Seismic surveying, Air blast circuit), P.E.T bottling, Engine start, Industrial

Rotary Vane

Based on traditional, tried and tested technology, the vane compressor is directly driven at very low speed (1450rpm), offering unrivalled reliability. The rotor, the only continually moving part, has a number of slots machined along its length into which fit sliding vanes that ride on a film of oil.

The rotor rotates within a cylindrical stator. During rotation, centrifugal force extends the vanes from their slots, forming individual compression cells. Rotation decreases the cell volume, increasing the air pressure.

The heat generated by compression is controlled by pressurised oil injection.

The high pressure air is discharged through the outlet port with the remaining traces of oil removed by the final oil separator.

Compression capabilities:
CompAir's Vane compressors operate between 1.1 kW to 75 kW (1.5 to 100hp), producing working pressures of 7 to 8 and 10 bar (101 to 145psi).

Typical applications:
OEM, Printing, Pneumatics, Laboratories, Dentistry, Instruments, Machine tools, Packaging, Robotics