Compressed air solutions for cable blowing

Cable blowing operations require precise control of airflow and pressure to ensure smooth cable installation without overstressing the cable or the duct system. Atlas Copco portable air compressors are engineered to deliver the stability, flexibility, and efficiency needed for these sensitive applications.

Compressed air plays a key role in helping the cable move smoothly through the duct by reducing friction and supporting controlled, steady movement.

• Cleaning the duct: Before installation starts, compressed air can blow a sponge or carrier through the duct to remove dust, moisture or debris. 

• Helping the cable move forward: Airflow inside the duct supports the cable as it advances, reducing mechanical stress and enabling longer installation distances. 

• Reducing friction: The high‑velocity airflow lowers friction between the cable and duct walls, helping protect the cable and improve installation efficiency. 

• Keeping movement controlled: Stable pressure and airflow help maintain a consistent cable speed, reducing the risk of damage and ensuring accurate placement.

Clean, dry compressed air is essential for this process. Moisture or contaminants can increase friction, affect installation performance and potentially damage sensitive cable materials.

Selecting the right compressor is essential to achieving reliable and efficient cable blowing performance. Consider four key parameters: free air delivery, pressure, energy efficiency, and compressed air quality.

Understanding how these parameters interact helps ensure the compressor is correctly matched to the cable type, duct system, and installation conditions.

Free air delivery (FAD) determines the volume of air supplied to the duct during cable blowing. Compressor sizing should be based on the duct size, not the cable blowing machine. The longer the blowing distance, the higher the air flow required. 

If airflow is too low, installation distance and speed may be limited. Atlas Copco compressors with PACE technology allow airflow to be optimized by adjusting pressure settings, helping maintain stable performance even when conditions change.

Pressure plays a key role in cable blowing by influencing air velocity inside the duct. Different duct diameters, cable sizes, and installation lengths require different pressure levels. Maintain a constant pressure of 10 bar. For smaller tube diameters, you may need a pressure of 14 bar.

With adjustable working pressure enabled by Pressure Adjusted through Cognitive Electronics (PACE) technology, Atlas Copco compressors allow operators to set the appropriate pressure for each installation, ensuring controlled cable movement while reducing the risk of overstressing the cable.

Energy efficiency is an important factor in the total cost of ownership of a compressor, since fuel or electricity costs can significantly exceed the initial purchase price over the machine’s lifetime. 

Our diesel, electric and battery‑driven portable air compressors are engineered with in‑house developed compressor elements optimized for efficiency. This results in lower fuel or energy consumption while delivering the stable air performance required for cable blowing applications.

Clean, dry, aftercooled compressed air is essential for safe and efficient cable blowing. Moisture inside the duct increases friction, creates condensation, and can damage sensitive fiber optic cables. Using aftercooled air helps reduce duct humidity, protect the cable during installation, and maintain consistent blowing performance — especially on long‑distance jobs.