1.World-class Compression Structure - Z Screw:

The "Z Screw" consists of one active rotor and a pair of star wheels, achieving dynamic balance with low vibration, low noise, and long service life.

2.Air End:

High-Precision Rotor:
The core rotor is made of highly corrosion-resistant stainless steel. High precision mirror-smooth tooth surfaces finish significantly reduces internal leakage.
A unique thermal expansion control design ensures precise and stable rotor clearances during operation, increasing air output by 5~10%.

Stainless Steel Alloy Casing:
The casing is integrally forged with no welding, offering superior strength and hardness compared to traditional welded structures.
The uniquely designed screw profile ensures zero contact between the rotor and casing during operation, eliminating wear and significantly extending service life.
The inlet and outlet ports are symmetrically positioned on the top and bottom of air end, preventing axial negative pressure and prolonging bearing lifespan.
Only water for lubrication and sealing to achieving true oil-free and environmentally friendly compression.

 

3.Ceramic Bearings:

1. No physical contact inside; sliding is achieved through water flow without the need for lubricating oil, ensuring a longer service life.
2. Maintenance-free.
3. Excellent oxidation and corrosion resistance with good lubrication performance.

 

4.All Stainless Steel Piping:

1. Simple design, corrosion-free, pollution-free, and highly reliable.
2. All stainless steel for internal piping and joints, effectively preventing common leaks and premature aging seen in flexible pipes.
3. Optimized design reduces pipe friction losses, improving system efficiency

 

5.True Energy Saving:

Oil free air compressor is a kind of compressor that provides clean, pollution-free, 100% oil free screw air compressor, its zero emission can protect the environment efficiently.

 

6. Water - Lubrication, Sealing and Cooling:

Lubrication: Pure water replaces oil for lubrication, ensuring air quality.
Sealing: The floating meshing profile forms pure sliding friction between meshing pairs. Water film seals the gaps, creating a continuous and stable sealing zone. This enhances oil free compressor volumetric efficiency by 25% compared to lubrication-free compression.
Cooling (Isothermal Compression): The superior floating mesh and unique water spray structure atomises pure water into a mist and mixes it with the compressed gas. Extensive heat exchange surfaces rapidly absorb compression heat, effectively reducing the exhaust temperature of the oil free air compressor to 35-55°C. This achieves ideal isothermal compression while avoiding heat loss.

 

7. VSD Frequency Control:

Eliminates energy waste caused by unloading and idle operation.

 

 

9. Integrated Control Operation:

Intelligent and energy-saving industrial integration system enhances operational efficiency and reduces energy consumption.

 

10. Noise Reduction (Silent Technology):

Atomized pure water absorbs and dampens sound energy and waves, reducing noise by 10-20 dB. Combined with low-speed(3000 rpm) operation, optimized rotor profiles, and sealed noise-isolation design, the oil free air compressor operates quietly.

(Water-lubricated Oil-free Compressor)

 

11. Single Stage Compression ,High Efficiency ,and Energy Saving ,and Easy Maintenance:

Single stage compression makes the structure easy.
Compression efficiency is higher than the two stage dry oil free compressor.
No lubricant, oil separator, or oil filter replacement costs. Only air and water filters require periodic changes. Simplified structure allows easy disassembly and maintenance (completed within 60 minutes), minimizing downtime and ensuring rapid resumption of production.

 

 

12. Precision Engineering and Reliable Components

This oil free air compressor boasts a superior form factor, rigorous manufacturing process, and quality components to ensure precision and durability: stainless steel housing (corrosion-resistant), imported starwheel material (stronger performance), water-lubricated bearings (absolutely oil-free), copper-alloyed rotors (stable in water-lubricated environments), and stainless steel rotor shafts (corrosion-free). Elang's innovative floating engagement technology upgrades the traditional single-point contact between the screw and star wheel to a near-surface engagement, creating ideal hydrodynamic lubrication. This achieves a floating engagement that keeps the star wheel wear-free. A continuous sealing zone reduces internal leakage and noise while increasing volumetric efficiency. This results in higher displacement, lower energy consumption, longer service life and reliable continuous air supply for oil free compressors.

 

Oil free screw air compressor

 

This oil free screw air compressor is widely used in industries with high requirements on air source, such as: pharmaceutical, food, electronics, chemical, packaging, etc. 100% pure compressed air is not only a necessary procedure to ensure the qualified quality of the process and products, but also the most outstanding feature of this oil free air compressor to ensure the safe and risk-free production of high-end products.

 

The lubrication system of the oil free compressor is a separate fuel circulation unit. The compression chamber and bearings of an oil-free air compressor are separated by a sealed set of high-performance mechanical components. The lubricant can only flow within the enclosed area and cannot enter the compression chamber, which is filled with 100% pure oil-free compressed air. Users can obtain 100% pure compressed air from this oil free compressor by simply adding water and dusting the compressor after treatment.

 

Product News: Also presented at the Hannover Messe 2025 in Germany, this oil free compressor is not only known and appreciated inside and outside the industry, but also offers a wide range of economically sustainable air solutions for various industry sectors.

 

Why choose a water-lubricated oil free air compressor?

 

A water lubricated oil free compressor is characterised by the use of water. It uses water as the lubricant and seals to produce 100% oil-free compressed air. Due to the high cooling efficiency of the lubricating water sprayed into the compression chamber, the exhaust air temperature of an oil free air compressor can be as low as 40-50 degrees. With constant temperature compression, water-lubricated oil free compressors have a higher volumetric efficiency (typically 15 per cent higher than dry oil-free screw air compressors) and are less expensive.

(Water-lubricated Oil free Air Compressor)

’ Warm reminder: For your project combined with our oil free compressor, we will give you a reasonable and affordable air solution, contact us now!

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Extended Content:
Oil-free Screw Air Compressor Compared with Oil-free Piston Compressor