Metally wired reinforced ventilation ducting for positive and negative airflow.
Smooth radius Elbows, Laterals, Wyes, Tees, adapters and transition accessories available.
Protan can deliver also a wide range of ventilation systems for underground and mines structures
Ventilation accounts for more than 40 % of each mine or tunnel overall energy costs and energy cost has increased over 44 % in past years making up 10 % of all operating costs, hence the big expense after labour.
Nordic duct manufacturing quality
Optimised strength
Minimum friction, reducing energy costs
Quick installation
Fire resistant
Transports air through low headroom passages or in tunnels with limited headroom
Two parallel ducts – up to 40 % more headroom
Lower energy consumption and more air to the tunnel face with the same fan output
Secure couplings
Fire resistant
Provides fresh air vertically through a shaft construction
Air-tight and durable transition from vertical to horizontal ventilation system
Custom-made suspension ribs for stability
Flexible solutions for excavation and static installations
Protan Easy to combine with dust collectors
To be used for both suction (negative pressure) and forced-air (positive pressure) ventilation.
Very high burst pressure
Can be used instead of bends if turbulence is accepted.
We develop and test all solutions and their quality at our laboratory in Drammen. The laboratory is approved by world-leading Norwegian certification society Det Norske Veritas (DNV) and follows strict testing and documentation routines.
All systems undergo in-depth monitoring and quality assurance before delivery.
Through innovation and continuous improvement, we always strive to offer the best duct quality that is:
Ventiflex ventilation ducts are designed to transport fresh air to the working face in tunnels and mines. The system helps remove dust, gases, and heat generated by excavation equipment and blasting.
Efficient ventilation is essential for maintaining safe working conditions underground and supporting continuous progress during tunneling and mining operations.
Tunnel ventilation plays a critical role in maintaining a safe working environment underground. By supplying fresh air and removing hazardous gases, dust, and diesel emissions, ventilation systems help maintain safe oxygen levels for workers and equipment. Protan Ventiflex ventilation systems are developed to deliver reliable airflow in demanding underground conditions.
Flexible ventilation ducts offer several advantages in tunneling projects. Protan Ventiflex ducts are lightweight, easy to transport, and quick to install as the tunnel advances. They enable efficient airflow over long distances and can be extended as excavation progresses, making them well suited for dynamic underground construction environments.
Ventilation ducts with low-friction inner surfaces reduce resistance to airflow inside the system. This allows air to travel more efficiently through the ducting. Ventiflex ducts are engineered to support efficient airflow, which can help improve ventilation performance and reduce energy demand from ventilation fans.
Ventilation ducts used in tunnels and mines must meet strict fire safety requirements due to the confined nature of underground environments.
Protan Ventiflex systems are manufactured with flame-retardant and self-extinguishing properties to help reduce fire risks and support safe tunnel operations.
Ventilation ducts are typically suspended along the tunnel wall or crown and connected in sections. As excavation moves forward, additional duct sections are installed to maintain airflow at the tunnel face. Ventiflex systems are designed for efficient installation and easy extension throughout the construction process.
Ventilation ducts are available in a range of diameters and lengths depending on the airflow requirements of the project. At Protan, Ventiflex solutions can be tailored to suit different tunnel dimensions, ventilation needs, and fan capacities.
Efficient ventilation systems reduce air leakage and minimize friction losses, allowing ventilation fans to operate more effectively. Ventiflex ducts are designed with high airtightness and optimized airflow performance, helping improve energy efficiency in tunnel and mining ventilation systems.
