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A PET high-pressure blow molding air compressor is a specialized high-pressure air supply unit for PET (polyethylene terephthalate) bottle production. It delivers stable, clean compressed air (typically 25–40 bar) to heat the preform and then blow it into its final shape.
Designed specifically for PET plastic bottle blow molding, this high-pressure air compressor supplies stable, clean air at 25–40 bar, which is used to heat the preform and then expand it into a bottle.
This high-pressure air compressor is engineered for PET blow molding applications. It provides a consistent supply of clean air (usually 25–40 bar) to heat the preform and subsequently blow it into shape.

Product Parameters
| Model | Air delivery (m³/min) | Working Pressure (Bar) | Motor Power (kW) | Speed (RPM) | Dimension (mm) | Weight (kg) | ||||||||||||||||||||||||
| RKL-20/40 | 20 | 40 | 200 | 470 | 4650*2200*2780 | 7800 | ||||||||||||||||||||||||
| RKL-22/40 | 22 | 40 | 220 | 500 | 4650×2200*2780 | 8000 | ||||||||||||||||||||||||
| RKL-25/40 | 25 | 40 | 250 | 390 | 4950*2690*2980 | 8500 | ||||||||||||||||||||||||
| RKL-28/40 | 28 | 40 | 280 | 440 | 4950*2690*2980 | 8800 | ||||||||||||||||||||||||
| RKL-30/40 | 30 | 40 | 315 | 470 | 4950*2690*2980 | 9000 | ||||||||||||||||||||||||
Key Advantages of Rocky Compressors over AF Models:
1. Comparable Operational Stability
Rocky delivers highly comparable operational stability to AF, ensuring reliable 24/7 performance in PET blow molding applications.
2. Lower Maintenance Costs
Optimized design results in noticeably lower accessory and spare parts maintenance costs.
3. Superior Energy Efficiency
Advanced variable frequency drive (VFD) technology significantly reduces energy consumption, typically saving 25–40% compared to conventional fixed-speed systems.
4. Better Overall Cost Competitiveness
Faster delivery, flexible OEM supply, and lower total cost of ownership (TCO) make Rocky a strong, cost-effective AF alternative.
Main Applications
1. PET Bottle Manufacturing:Blow molding and stretch-blow molding of PET bottles for beverages, food, cosmetics, and pharmaceuticals
2. Food & Beverage:Packaging lines, food-grade compressed air for blow molding
3. Pharmaceutical & Cosmetics:High-pressure air for bottle and container production, clean processes
4. Industrial Manufacturing:Plastic injection molding, glass industry, cable industry, metallurgy, electronics
5. Automotive Industry:Component testing, pneumatic systems for assembly lines, high-pressure cleaning
6. General Industrial Gas:Industrial gas boosting, natural gas grid boosting, nitrogen handling
7. Pressure & Leak Testing:Pressure vessel testing, pipeline integrity testing, leak detection, stress testing
8. CNG & Hydrogen Energy:CNG vehicle refueling stations, natural gas vehicle (NGV) refueling, hydrogen compression for various processes