- Quantum Air Compressors® knows the importance of having a quality air compression and keeping your compressed air equipment in excellent running condition and at a cost effective price. That's why they are committed to providing the best compressed air tool services anywhere. Whether you require New Rotary Screw Air Compressors, Second hand compressors or a major overhaul of existing equipment, Quantum Air Compressors® Pty Ltd can meet your needs.