Colt High Pressure Oil-Free Booster Air Compressors are engineered to deliver clean, oil-free high-pressure air for critical PET industry applications. Available with discharge pressures up to 42 bar (608 psi) and flow capacities from 120 to 1,059 CFM, and up to 2,000 CFM on request, these compressors ensure contamination-free air, making them ideal for PET bottle blowing processes. Designed for reliable, energy-efficient, and continuous operation, they deliver consistent performance and superior air quality for demanding industrial applications. See the full model tables on our PET bottling air compressor page. Not sure whether you need a reciprocating compressor or a screw-plus-booster package? Read 40 bar air for PET: reciprocating or screw-plus-booster.
Quieter Operation
For Decades
Design
Occupancy
Easy Operation
IE3 Motor
Cycle Cost
Compressing in two stages with an intercooler between them keeps the compression ratio of each stage low. The air leaves cooler, the valves, rings and packings last longer, and the booster draws about 15% less power than a single-stage booster delivering the same flow and pressure. Water cooling holds the discharge temperature down in Indian summers, and with no oil in the compression chamber there are no oil changes, no oil filters and no oil carry-over into the bottle. For PET lines this is the configuration we recommend first.
VFD ensures there will be no high current peak at startup, as the current increases gradually, eliminating the need for heavy equipment to withstand current peaks.
Because of the narrow pressure band, the consumption at the peaks is omitted in comparison with Star Delta controls. This reduces energy consumption and provides a stable pressure.
During low requirement, VFD reduces the speed of the motor, resulting in lower energy consumption. The compressor consumes only the energy required to produce the demanded air.
Due to VFD operation, the average RPM of the compressor is reduced, resulting in lower wear and tear and significantly reduced maintenance requirements.