Ventiflex system
The art of transporting fresh air
Ventilation systems are indispensable components of tunnel and mine constructions, serving multifaceted roles. Through meticulous design, implementation, and maintenance, these systems contribute to the overall safety, functionality, and sustainability of tunnels, enhancing the quality of life for users and workers alike.
TUNNELS AND MINES
During construction, various activities such as blasting, excavation, and machinery operation generate dust, fumes, and exhaust gases. Without proper ventilation, these pollutants can accumulate to dangerous levels, posing health risks to workers and reducing visibility. Moreover, stagnant air can lead to the buildup of harmful gases like carbon monoxide (CO) and nitrogen dioxide (NO2), which are byproducts of combustion engines and can cause asphyxiation and respiratory problem.
VENTILATION IS CRITICAL FOR A VARIETY OF REASONS
Air quality: Mine tunnels and station tunnels require adequate ventilation for physiological, cooling and smoke control requirements. Ventilation in tunnel constructions is paramount for ensuring the safety, functionality, and durability of such infrastructures. Tunnels, by their very nature, restrict natural airflow and can accumulate hazardous gases, pollutants, and heat, creating an inhospitable environment for workers and users alike. Therefore, a well-designed ventilation system is essential to address several critical aspects during the excavation.
Temperature Regulation: Tunnels can experience significant temperature variations due to factors like geological conditions.
Fire Safety: Effective ventilation plays a crucial role in managing fire events by controlling the spread of smoke, heat, and toxic gases, thereby facilitating safe evacuation routes and aiding firefighting operations. Smoke extraction systems, for instance, utilize ventilation shafts to remove smoke from the tunnel, improving visibility and enhancing the effectiveness of emergency response efforts.
Pressure Management: Changes in air pressure within tunnels can occur due to factors such as vehicle movement, cross-sectional area variations, and external atmospheric conditions. Inadequate ventilation can exacerbate pressure differentials, leading to discomfort for users, structural integrity issues, and increased energy consumption for ventilation systems. Properly designed ventilation systems help mitigate pressure differentials by maintaining optimal airflow rates and distribution throughout the tunnel network.
Ventilation system
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.
We can deliver also a wide range of ventilation systems for underground and mines structures.
Ventiflex Air
- Nordic duct manufacturing quality
- Optimised strength
- Minimum friction, reducing energy costs
- Quick instalation
- Fire resistant
Ventiflex Duo
- Transports air through low headroom passages or in tunnels with limited headroom
- Two paralell 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
Ventiflex Shaft
- 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
Ventiflex Spiral Duct
- 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.
Ventiflex accessories
The choice of duct quality is dictated by the working air pressure calculated for the ventilation system. We supply duct lengths to specification for all qualities and diameters. All ducts are supplied standard in yellow, apart from antistatic ducts, which are in light grey and white. All Ventiflex details have been developed to optimise air flow in accordance with the laws of aerodynamics and are produced in the strongest duct quality to withstand high stress.
Ventiflex Y-piece
Duct qualities:
- 6212 FR
- 6298 FR
- 6298 FR
- 7111 FRAS
- 7198 FRAS
FR = Fire Resistant
AS = Anti Static
Ventiflex T-piece
Our duct qualities are:
- Fire resistant – FR
- Self-extinguishing
- Diameter 400 - 3,200 mm
Ventiflex Bend
- Transition piece
- Trousers
- Way branch
- X-piece
- Radius branch piece
- Horn piece
Ventiflex Branch
Ventiflex Transition
Our details come in all diameters and for all coupling systems. Ventiflex details can be customised to specification for more extreme ventilation duct installations to ensure optimum airflow, in example long duct installations.
We offer all kinds of details and can also a combine several details in one project.
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
Our standard coupling systems :
VF / LP coupling
Flex joint
Zip coupling
Velcro coupling
VENTIFLEX SUSPENSION HOOKS – FOR MANY ENVIRONMENTS
The industrial design of our suspension hooks and the range we offer have been developed on the basis of many years of experience to cover a variety of environments and situations in underground ventilation systems. Our hooks are dimensioned to withstand high tensile stress caused by powerful external winds, internal turbulence and vibrations in the duct system.
Every Ventiflex hook system has its advantages :
Ventiflex VF hook
The Ventiflex VF hook has a 380 mm wire attached for alignment purposes in drill-and-blast (D&B) tunnels and mines. This hook is also essential in pur Duo-duct system.
Ventiflex snap hook
Ventiflex snap hooks are used for fast installation and dismantling. For many customers this is their preferred hook in TBM-driven tunnels.
LP hook
Ventiflex LP hooks are easy to attach straight to the suspension wire when there is no need to adjust the height
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