Oil-free Water lubricated Air Compressor

Yuzhen Oil-free Water lubricated Air Compressor, using water instead of oil, achieves truly oil-free compression from the source. With its stable structure and reliable operation, it is particularly suitable for industrial scenarios requiring high compressed air purity and relatively stable air demand, making it a reliable choice for the food, pharmaceutical, and electronics industries.

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Product Description

Features Introduction

1. The main unit utilizes "liquid-floating" technology

In theory, the screw and star wheel achieve a frictionless, non-contact design, which minimizes airflow decline. In practical use, this significantly reduces airflow reduction issues and improves volumetric compression efficiency

2. The main unit and system are constructed from corrosion-resistant materials such as stainless steel

This ensures maximum cleanliness and an extended service life.

3. Fully sealed technology and system simplification reduce failure rates

This minimizes airflow loss, extends the replacement intervals for maintenance consumables, and maintains a cleaner internal compressor system.

4. Standardization of components

Enables standardized production and enhances product reliability.

5. Patents related to Nairlee compression host

a) Patent 1: Liquid floating technology, surface contact "zero‑stress" profile technology

b) Patent 2: Special mechanical seal design, the machine itself provides excellent sealing performance without relying on external equipment, thereby avoiding additional risk points caused by external device failure.

6. Rotor high hardness

Screw rotor material selection of high strength stainless steel alloy steel (such as 42 crmo, 304316220 5, etc.), the quenching + nitriding treatment, acuity HRC58 hardness, resistance to fatigue strength increase of 40%.

7. High purity

Screw water lubrication technology, adopts screw mesh structure, realize seal between the rotor and through water film cooling, full seal cavity regardless of any form of oil pollution. When the speed is less than 3000 revolutions per minute, it is basically isothermal compression.

8. The profile technology of the contact surface between the gravel-resistant screw and the star wheel plate

The profile technology of the contact surface between the Nairlee screw and the star wheel plate has changed the meshing pair of the screw from the traditional line meshing to the current surface meshing, which greatly increases the meshing area and significantly reduces the contact stress of the meshing surface. At the same time, it adopts another patented technology of our company to greatly reduce the transmission resistance and achieve the balance of axial force, making the star wheel less prone to wear and having an extremely long service life. The simultaneous surface meshing technology reduces the leakage of heat-bearing compressed air during the compression process, solving the worldwide problem that screw compressors cannot perform high pressure.

9. Nairlee heavy-duty bearing resistance

The advantages of long service life, good stability, but the manufacturing cost is high.

10. Control system

(1) capacity of 40 ~ 100%.

(2) empty/heavy vehicle control. The vehicle will automatically stop if it has been empty for too long.

(3) start automatically. Load management is easy.

(4) according to the various air consumption, choose different control modes.

11. Piping system

(1) are all made of 304 stainless steel pipe and some special corrosion resistant materials connected

(2) due to the stainless steel screw host, stainless steel system, can use for a long time, the host after big maintenance efficiency unchanged can continue to use, life up to 25 years (160000 hours)

Why are more and more companies choosing "water-lubricated oil-free" compressors?

In many industries, "oil-free" is no longer a bonus, but a mandatory requirement.

Traditional oil-lubricated air compressors, even with multi-stage filtration, can hardly completely avoid the risk of oil mist; while water-lubricated oil-free technology directly changes the logic at the structural level – by not using lubricating oil, there is naturally no possibility of oil contamination.

This Yuzhen Oil-free Water lubricated Fixed Speed Screw Air Compressor uses water as the lubrication, sealing, and cooling medium, making the compression process cleaner and safer, and better meeting current requirements for environmental protection and product quality.

Fixed-frequency design, stability is the biggest advantage

Not all factories need a variable-frequency system.

For production lines with stable air consumption, long operating times, and minimal changes in working conditions, a fixed-frequency air compressor is a more reliable and worry-free choice.

This Oil-free Water lubricated Fixed Speed Screw Air Compressor has several outstanding advantages: it has a constant speed and simple operating logic, the system is very mature, ensuring long-term stable operation, and maintenance is straightforward with a low failure rate.

The water-lubricated structure has several inherent advantages:

Better cooling performance and lower operating temperature rise

Cleaner internal system, reducing carbon deposits and impurities

More gentle working environment for components, resulting in a longer service life

In actual operation, the equipment has lower noise and more stable performance, suitable for production workshops with specific requirements for the working environment.

Nairlee A series Energy Saving Oil Free Water Lubricated Screw Compressor-Technical Parameter

Model	Max. working pressure	FAD	Motor power	Noise	Cooling water outlet/inlet diameter	Quantity of cooling water Inlet water 32℃	Quantity of lubricating water	Dimension L×W×H	Weight	Air outlet
	Mpa	M³/min	KWHP	DB		T/H	L	mm	KG
NLW-06AW	0.8	0.72	5.5/7.5	57	3/4"	1.5	10	800×800×1200	430	3/4"
	1.0	0.65
NLW-08AW	0.8	1.05	7.5/10	57	3/4"	2	10	800×800×1200	470	3/4"
	1.0	0.8
NLW-11AW	0.8	1.72	11/15	60	1"	2.5	26	1200×855×1335	580	3/4"
	1.0	1.42
NLW-15A/W	0.8	2.25	15/20	60	1"	3.5	26	1200×855×1335	620	3/4"
	1.0	1.92
NLW-18AW	0.8	3.0	18.5/25	63	1"	4	30	1400×1010×1340	680	1"
	1.0	2.2
NLW-22AW	0.8	3.65	22/30	63	1"	5	30	1400×1010×1340	730	1"
	1.0	3.0
NLW-30AW	0.8	5.0	30/40	66	11/2"	7	40	1650×1180×1505(A)	1100	11/4"
	1.0	3.9						1500×1080×1300(W)
NLW-37AW	0.8	6.3	37/50	66	11/2"	9	40	1650×1180×1505(A)	1150	11/4"
	1.0	5.33						1500×1080×1300(W)
NLW-45AW	0.8	7.8	45/60	68	11/2"	10	90	2050×1300×1758(A)	1390	2"
	1.0	6.3						1800×1360×1670(W)
NLW-55AW	0.8	10.1	55/75	69	11/2"	12	100	2150×1300×1758(A)	1470	2"
	1.0	7.9						1800×1360×1670(W)