Fiber Blowing Technology Explained

As fiber optic networks expand globally to meet the ever-growing demand for high-speed connectivity, the efficiency and reliability of installation methods become crucial. Among various techniques, air blown fiber installation stands out for its speed, safety, and minimal infrastructure disruption. This method not only accelerates deployment but also allows for flexible network expansion over time. Let’s explore how it works and why it's transforming modern network installations.

Understanding the Air Blown Fiber Installation Principle

Air blown fiber installation uses a combination of pulling force, compressed air propulsion, and the mechanical thrust of the cable blowing machine to efficiently insert fiber optic cables into microducts.

An air compressor generates compressed air, which flows through a hose into the sealed chamber of the blowing machine. The microduct’s outlet is connected to this chamber, and the pulling tool, together with the cable, is placed inside the duct. Rubber seals around the pulling tool ensure an airtight chamber, allowing air pressure to push the tool — and the cable — forward.

The consistent air pressure from the compressor maintains steady force on the cable, ensuring smooth, uninterrupted movement. Additionally, the airflow helps suspend the fiber cable within the duct, reducing friction and minimizing the risk of damage during installation. Conveyor belts inside the blowing machine further assist by physically propelling the cable forward.

Key Technical Considerations

To ensure efficient installation, attention to detail is essential. Here are the main technical points:

1. Choose the right equipment.

Compressor pressure should range between 0.6–1.5 MPa, with airflow exceeding 10 m³/min. Blowing machines must deliver adequate thrust for your project.

2. Duct preparation.

Test ducts for leaks or damage before installation. Make sure they are clear of debris.

3. Use appropriate lubrication.

Apply lubricant according to duct smoothness, route complexity, and expected cable length. This directly affects blowing speed and distance.

4. Adapt to different terrain.

For steep routes, use a piston blowing head for better traction. For flat routes with occasional curves, a non-piston head is sufficient.

5. Clean cables continuously.

Keep cables free of dirt and moisture to reduce friction during installation.

6. Control blowing speed.

Maintain a safe speed of 60–90 meters per minute, not exceeding 100 m/min to avoid cable twisting.

7. Monitor installation closely.

If progress slows significantly, stop to check for blockages and avoid damaging the cable or equipment.

8. Ensure safety at the duct exit.

Have trained personnel manage the duct exit to prevent accidents and properly manage the emerging cable.

9. Maintain safe bending radii.

Whether blowing or looping cables, follow manufacturer guidelines to prevent damage.

10. Operator training.

Proper operation is critical to ensure the safety of people, equipment, and cables.

Applications of Air Blown Microcable Technology

This technique is suitable for multiple scenarios:

1. Long-haul networks: Install microducts in advance, then blow in micro cables as capacity needs grow. This scalable approach future-proofs the network.

2. Access networks: Pre-lay microduct pathways and add outdoor-grade micro cables as user demand arises. This method eliminates the need for splicing at branching points, significantly improving network flexibility.

Advantages of Air Blown Microcable Installation

1. Faster installation speeds.

2. Wide applicability for outdoor networks, including both long-haul and access networks.

3. Flexible in-building wiring and network branching.

4. Fewer splice points, enabling route changes anytime.

5. Supports network expansion without excavation.

6. Meets growing commercial and residential network demands with ease.

7. Low initial costs with scalable investment based on demand.

In summary, air blown fiber installation is an advanced, flexible, and highly efficient method that keeps pace with the rapidly changing demands of modern communications networks. By adopting this technology, network operators can deploy robust infrastructure while remaining prepared for future growth.

FCST - Better FTTx, Better Life.

At FCST, we manufacture top-quality microduct connectors, microduct closure, telecom manhole chambers and fiber splice boxes since 2003. Our products boast superior resistance to failure, corrosion, and deposits, and are designed for high performance in extreme temperatures. We prioritize sustainability with mechanical couplers and long-lasting durabili-ty.

FCST aspires to a more connected world, believing everyone deserves access to high-speed broadband. We're dedicat-ed to expanding globally, evolving our products, and tackling modern challenges with innovative solutions. As technology advances and connects billions more devices, FCST helps developing regions leapfrog outdated technologies with

sustainable solutions, evolving from a small company to a global leader in future fiber cable needs.