Industrial fan

Industrial fans and blowers are machines whose primary function is to provide and accommodate a large flow of air or gas to various parts of a building or other structures.

This is achieved by rotating a number of blades, connected to a hub and shaft, and driven by a motor or turbine.

There are many uses for the continuous flow of air or gas that industrial fans generate, including combustion, ventilation, aeration, particulate transport, exhaust, cooling, air-cleaning, and drying, to name a few.

The assembly of the hub, disk and blades is known as the fan wheel, and often includes other components with aerodynamic or structural functions.

The air or gas inside the spinning fan is thrown off the outside of the wheel, to an outlet at the housing's largest diameter.

[1] Inlet and outlet ducting are often attached to the fan's housing, to supply and/or exhaust the air or gas to the industry's requirements.

The axial fan is often contained within a short section of cylindrical ductwork, to which inlet and outlet ducting can be connected.

When the application involves more complex specifications or a larger fan, then a design based on an existing model configuration will often satisfy the requirements.

An appropriate model from the fan company's catalogue is selected, and the company's engineers apply design rules to calculate the dimensions and select options and material for the desired performance, strength and operating environment.

Some applications require a dedicated, custom configuration for a fan design to satisfy all specifications.

All industrial fan designs must be accurately engineered to meet performance specifications while maintaining structural integrity.

Depending on the application, the fan may be subject to high rotating speeds, an operating environment with corrosive chemicals or abrasive air streams, and extreme temperatures.

Larger fans and higher speeds produce greater forces on the rotating structures; for safety and reliability, the design must eliminate excessive stresses and excitable resonant frequencies.

Airfoil (Air foil) – Used for a wide range of applications in many industries, fans with hollow, airfoil-profiled blades are designed for use in airstreams where high efficiency and quiet operation are required.

They are used extensively for continuous service at ambient and elevated temperatures in forced and induced draft applications in the metals, chemical, power generation, paper, rock products, glass, resource recovery, incineration and other industries throughout the world.

This rugged design is used in high-volume flow rate applications when the pressure requirement is rather high and erosion resistance is necessary.

Forward-curve – This "squirrel cage" impeller generates the highest volume flow rate (for a given tip speed) of all the centrifugal fans.

However, these fans can only be used for conveying air with low dust loading because they are the most sensitive to particle build-up, but also due to the large number of blades that forward-curve wheels require.

Jet Fans are used for daily ventilation requirements and smoke extraction in case of fire (250 ® C/120 min) These Industrial fans have symmetrical impeller blades; 100% reversible with low noise emissions IP55 motors, insulation class H (smoke extraction version).