The advantages of water-lubricated oil-free screw air compressors

Water-lubricated oil-free screw air compressors use pure water as the lubrication, cooling and sealing medium instead of lubricating oil, bringing multiple advantages such as 100% oil-free air supply, energy saving, low maintenance cost, environmental protection and long service life. The details are as follows:

1. 100% Oil-Free Compressed Air (ISO 8573-1 Class 0)

• No lubricating oil is used in the whole machine, and pure water is directly injected into the compression chamber for lubrication, ensuring that the output compressed air is absolutely oil-free with an oil content ≤0.01mg/m³.

• It meets the strict requirements of food, beverage, pharmaceutical, electronic manufacturing and other industries for air purity, and complies with HACCP, GMP and other certifications.

• There is no risk of oil pollution, avoiding product quality problems caused by oil contamination.

2. Significant Energy Saving & High Efficiency

• Isothermal compression: The host operating temperature is lower than 50°C (even ≤45°C), which reduces energy loss and improves volumetric efficiency.

• Compared with dry two-stage compression oil-free screw air compressors, it saves more than 15% energy on average; compared with dry single-stage compression, it saves more than 25% energy.

• Under the same power, the air delivery volume is increased by more than 10% compared with dry oil-free screw air compressors.

3. Low Maintenance Cost & Easy Operation

• Few consumables: Daily maintenance only requires replacing air filters and water filters, eliminating the need for oil filters, oil separators and other parts, reducing maintenance workload and cost by about 40%.

• Simple structure: The direct drive design without a gearbox reduces fault points; the PLC intelligent control system realizes automatic fault detection, early warning and maintenance reminder.

• Convenient maintenance: No oil circuit cleaning or oil replacement is required, and the daily operation threshold is low.

4. Environmental Protection & Health

• No oil mist or oil odor is discharged during operation, and there is no oil pollution risk, which is in line with the green production concept.

• No lubricating oil waste residue is generated, avoiding environmental pollution caused by waste oil treatment.

• The water-lubricated system reduces vibration and noise (low noise design), creating a quiet working environment.

5. High Reliability & Long Service Life

• Low wear: The water film forms a uniform lubricating layer on the rotor surface, reducing metal friction and extending the service life of the host (the design life is more than 20 years).

• Stable operation: The rotor is stressed evenly, with small vibration and pressure pulsation, ensuring stable exhaust pressure and flow.

• Wide adaptability: It can operate stably in high temperature, high humidity, explosion-proof and other special working conditions, and is suitable for chemical industry, new energy, marine engineering and other scenarios.

6. Safe & Compliant

• The oil-free design eliminates the hidden danger of oil combustion, and the water-lubricated cooling reduces the risk of high-temperature failure.

• The compressed air meets the oil-free standard, avoiding production shutdown or quality accidents caused by oil pollution, and ensuring production safety.

In summary, water-lubricated oil-free screw air compressors have become the preferred equipment for industries requiring high air purity with their core advantages of oil-free, energy-saving, low maintenance, environmental protection and durability.