Oil-Free Screw Electricr Textile Chemical Industry Sewage Wastewater Treatment Pneumatic Converying Pump Compressor Air Blowe for Fermentation. 100% Oil-Free Air Supply: Class 0 certified oil-free air supply for wastewater, conveying, and fermentation. Energy Efficiency Savings: Saves up to 35-40% energy costs compared to lobe or roots technology. Permanent Magnet VSD Technology: Adopts interior permanent magnet motor VSD for flexible and reliable operation. Steady Non-Pulsating Flow: Internal compression process minimizes vibration and ensures steady air flow. Low Maintenance Design: Optimized internal compression reduces heat transfer and extends machine lifetime. Wide Application Range: Suitable for wastewater treatment, pneumatic conveying, fermentation, and textile. ISO Certified Quality: Product meets ISO certification standards for reliability and safety. Carbon Steel Construction: Durable carbon steel material ensures long-term performance in industrial use.