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PurAir single stage oil-free screw air compressor , the patented 4:6 tooth screw profile is adopted. The screws maintain a small gap between them, mesh with each other but do not contact , and there is no oil in the compression chamber 100% , providing customers with clean compressed air.

Name：Single stage oil-free series FAD 8~150 m³/min
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Single stage oil-free screw compressor


   Pressure range : 1.5 bar<p< 3.5 bar

        FAD 8-150 m³/min 


Energy saving design

The oil-free screw air end is specially designed for low pressure applications. Different pressure ratios are designed for different exhaust pressures to avoid over compression.


Environmental protection and maintenance concepts 

Single stage dry compression can effectively control the size of the whole machine, the advanced design concept gives it a fashionable appearance and compact internal structure, low noise, super purification, small footprint, easy to maintain.



High efficiency oil free compressor air end

  •  Advanced processing technology ensures high efficiency and stability of the air end

  •  Forged steel rotor has high strength and less expansion

  •  It is suitable for oil - and water-cooled jacket cooling

  •  It is allowed to be used at 45℃


Optimized bearing structure design

  • One pair of radial bearings and one pair of axial bearings are used for both male and female rotors

  • High quality bearings meet the requirements of 20,000-30,000 RPM

  • Robust bearing positioning ensures optimum rotor clearance

  • SKF bearings ensure the high efficiency and long service life of the air end


Top quality seal ensures no oil

  • Air seal adopts stainless steel floating ring, small clearance, no friction, low gas consumption

  • The inlet is designed to resist negative pressure, which further reduces the loss of compressed air

  • The oil seal adopts nickel-plated alloy reverse floating ring design, no friction, small clearance, to ensure no leakage


Food grade quality requirements

  • All stainless steel piping

  • Food grade high temperature and corrosion resistant coatings meet the requirements of various industries

  • The rotor and inner wall of two-stage compression are coated

  • Strict factory test


Series parameters

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Note： 

1.The above parameters are based on the inlet conditions at pressure 1.0Bar(A), temperature 20℃ and relative humidity 0%, tested   according to ISO 1217 4th Edition Annex E standard. 

2.The data in the table is applicable to 50Hz power supply. Please contact us for the parameters of 60Hz power supply. 

3.PurAir products continue to improve, please request the latest data sheet.




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