Protan Ventiflex Accessories

All Ventiflex accessories have been developed to optimize airflow in accordance with the laws of aerodynamics and are produced in the strongest duct quality to withstand high stress.

Protan’s fittings come in all diameters and for all coupling systems.

Ventiflex fittings can be customized to specification for more extreme ventilation duct installations to ensure optimum airflow, in example long duct installations.

Fan Connector

The Ventiflex Fan Connector is the optimum connection piece from the fan to the main duct. The dynamic pres- sure loss caused by the expanding angle will be regained as static pressure.


By using five segments for 900 turn and the ratio of R = 3D, the Ventiflex Bend gives the lowest static pressure and energy loss when using flexible ducting.

When the fan is running, this design allow the Ventiflex Bend to perform with an ideal shape from an air handling point of view, providing optimum flow efficiency when turning the air flow direction.


Branches are available in 30, 45, 60 and 90 degree angles.

The lowest static pressure loss and energy consumption will be achieved by using a Ventiflex Branch at the closest angle to the new direction of the air supply.

This ensures the least vibrations and mechanical stress and lowest energy consumption.

Y-T pieces

The lowest static pressure loss and energy consumption will be achieved by using a Ventiflex Y-T when splitting the air flow into two new directions.

The lowest pressure drop possible will occur when turning through angles by up to 90 degrees.


The Ventiflex Reducer has the optimum design for conversion from one diameter to another.

The reduction angle is set at six degrees, thereby causing an insignificant static pressure and energy loss. The Ventiflex Reducer may be used bi-directionally for conversions to reduced or increased diameters.


Minimize the operating costs

Protan Ventiflex helps to reduce the project’s cost by low friction, low shock loss and low leakage factors. The total pressure at the duct inlet and the air flow rate at the duct outlet are governed by these three factors.

To minimize the cost of operation and optimize the return on the investment, it is also essential to ensure that the system is properly installed and maintained. The importance of adequate planning for installation and maintenance cannot be underestimated.

The quality of the installation can minimize the risk of leakage and affect overall system performance. The better the installation of the duct, the better the fan’s performance and longevity, and the lower the long-term operating costs.

Ventiflex Couplings – Great Flexibility

Our range of couplings covers a variety of underground ventilation applications in mines and tunnels.

The couplings contribute to the ventilation system’s great flexibility and adaptability. All our coupling systems are high quality and feature industrial quality design.

  • Easy to install
  • Minimal leakage under high pressure
  • Reusable
  • Long life and good durability

Protan Ventiflex offers four standard coupling systems which are Zip – Velcro – VF-Coupling and Flex Joint.

Flame retardant and self-extinguishing

All Ventiflex systems are made to measure for every project and come in five different duct qualities.

All our duct qualities are flame retardant and self-extinguishing.

Two duct qualities also have antistatic properties and have been specially developed for environments where highly flammable gases may occur.