250 kW oil-free screw air compressor with water lubrication

Technical Advantages of the 250 kW Water-Lubricated Oil-Free Screw Air Compressor

The 250 kW high‑power water‑lubricated oil‑free screw compressor uses pure water as both the lubricant and the cooling medium, completely eliminating the risk of lubricating oil contaminating the compressed air. Compared with conventional dry‑type oil‑free compressors, water‑lubrication technology offers higher isothermal compression efficiency, significantly reducing energy consumption. Moreover, water’s high specific heat capacity delivers superior cooling performance, ensuring the unit’s stability and reliability even under prolonged, heavy‑load operation.

Core Product Specifications and Performance Reference

In the 250 kW power range, this type of air compressor is designed to meet the centralized compressed air supply needs of medium- and large-scale enterprises. The following are typical performance specifications for equipment in this category:

• Displacement rangeIt typically delivers a stable air flow of approximately 30 to 45 cubic meters per minute (under standard operating conditions), meeting the demands of large-scale continuous production.
• Work stressThe standard exhaust pressure is set between 0.7 and 0.8 MPa and can be adjusted as needed to match the actual pipeline network requirements.
• Cooling methodIt employs either water cooling or high-efficiency air-cooling design to ensure optimal heat dissipation and adapt to various workshop environments.
• Air qualityComplies with the ISO 8573-1 Class 0 oil-free standard, delivering pure compressed air.

Typical Application Scenarios

Thanks to its outstanding oil-free performance and high air delivery, the 250 kW water-lubricated compressor is widely used in industries with stringent air-quality requirements:

• Food and Beverage Processing: Used in material handling, mixing, packaging, and fermentation processes to prevent hydrocarbon contamination and ensure product safety.
• Biopharmaceuticals and Healthcare: Provides high-purity gas supplies for reactors, air-jet milling, and aseptic packaging, ensuring compliance with production standards.
• Electronics and Semiconductors: It meets the stringent requirements for ultraclean compressed air in processes such as chip manufacturing and printed circuit board cleaning.
• Fine chemicals: Provides safe, clean power for chemical reactions and pneumatic material conveying.

Key Considerations for Equipment Selection

To ensure that the 250 kW water-lubricated, oil-free screw compressor operates at peak efficiency, the following factors must be carefully evaluated during equipment selection:

• Accurate assessment of gas consumption: Conduct a comprehensive assessment of the air consumption of all pneumatic equipment in the workshop, and account for capacity expansion needs to prevent equipment redundancy or insufficient air supply.
• Pipeline network pressure lossCalculate the pressure drop in the piping from the compressor room to the farthest point of air consumption, and set the compressor discharge pressure appropriately to avoid unnecessary energy losses.
• Post-processing equipment matchingAlthough the compressor is oil-free, it still requires appropriate dryers and precision filters to remove moisture and particulate matter, ensuring that the dew point and cleanliness at the point of use meet the specified requirements.
• Installation Environment AssessmentConfirm the data center’s ventilation conditions, floor‑load capacity, and water quality. Water‑lubricated equipment has specific requirements for the conductivity and purity of the make‑up water; where necessary, a purified water generation system should be installed.