Class 0 Oil-Free Air Compressor 40 Bar Water-Injected Screw for PET Bottle Blow Molding

Oil free screw compressor features

1. 100% Oil‑Free – ISO 8573‑1 Class 0 Certified

The compression chamber uses water as the sole medium for sealing and cooling, eliminating any oil contamination risk. 

Output air meets the strictest purity standards (ISO 8573‑1 Class 0), with oil content below 0.01 mg/m³. This makes it an 

ideal choice for food‑grade PET preform production, beverage filling lines, and pharmaceutical environments.

2. Steady 40 Bar High‑Pressure Output

The unit maintains a stable 40 bar discharge with minimal fluctuation, ensuring consistent preform expansion and uniform 

wall thickness. It supplies high‑pressure air directly to blow molding equipment, removing the need for an additional booster.

3. Significant Energy Savings

By using water injection for near‑isothermal compression, this system consumes 15–25% less energy than single‑stage 

alternatives, while delivering up to 20% greater airflow at the same motor rating. With PM VFD technology, partial‑load 

energy use is reduced by another 15–25%.

4. Cooler Running – Longer Life

Water’s superior heat absorption keeps operating temperatures lower than oil‑based designs, boosting equipment reliability 

and extending service life.

5. Minimal Maintenance Requirements

No oil filters, separators, or oil changes — and zero waste oil disposal. Service tasks are limited to periodic water filter 

replacements and standard inspections. The absence of carbon or sludge deposits prolongs air end life, and consumables 

are few and easy to replace.

6. Quiet, Low‑Vibration Performance

Water effectively dampens noise and vibration, making the unit noticeably quieter than dry‑running or piston compressors. 

Smooth, pulse‑free airflow improves the working environment and reduces wear on downstream components.

7. Designed for Continuous 24/7 Operation

Built for non‑stop duty with food‑grade stainless steel and premium bearings. The automatic water exchange function permits 

maintenance without interrupting production.

8. Intelligent Controls & Remote Access

A PLC with HMI touchscreen enables full digital automation. Cloud‑based monitoring and predictive diagnostics minimize 

unplanned downtime, while IoT connectivity supports seamless Industry 4.0 integration.