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Mining & Industrial Fan Questions & Answers

Q&A on mining and industrial fans – types and application scenarios.

Q

Do mine or tunnel ventilation fans need to vent outside?

Mine and tunnel ventilation fans generally do need to vent outside or to another safe discharge point, because their primary function is to remove contaminated air from underground workings and enclos
Q

Which type of fan moves the most air?

When we ask “Which type of fan moves the most air?”, we usually mean which design can deliver the greatest air volume (flow rate), not just the strongest draft at one spot. In practical ventilation wo
Q

What does a centrifugal fan look like?

A centrifugal fan usually has a distinctive “snail shell” appearance. From the outside, you see a spiral, scroll-shaped steel housing with a circular inlet on one side and a rectangular or round outle
Q

What are those giant fans called?

When people point at a huge spinning unit on a factory ceiling or at the portal of a mine and ask, “What are those giant fans called?”, they are usually looking at a specialised type of industrial ven
Q

Which way should a centrifugal fan spin?

A centrifugal fan should spin in the direction specified by the manufacturer, usually marked by an arrow on the housing or motor. Correct rotation ensures that the impeller blades scoop air properly a
Q

What are huge fans called?

If you have ever walked into a warehouse, aircraft hangar or underground portal and seen a massive spinning unit overhead, you may wonder “What are those huge fans called?” In most modern buildings th
Q

How do you choose the right centrifugal fan?

Choosing the right centrifugal fan starts with understanding your ventilation duty and system conditions. A fan that is perfect for one industrial or mining application may be inefficient or unreliabl
Q

What are the disadvantages of an exhaust fan?

An exhaust fan is a simple and effective way to remove hot, humid or contaminated air from a room or process area, but it also has several disadvantages that need to be considered in ventilation desig
Q

Does an exhaust fan remove moisture?

Yes, an exhaust fan can help remove moisture, but it is important to understand how it works and what its limits are. An exhaust fan does not magically absorb water; instead, it removes humid air from
Q

What are centrifugal fans?

Centrifugal fans are industrial blowers that move air by means of a rotating impeller and a scroll-shaped housing, discharging the air radially at higher pressure than typical axial fans. They are wid
Q

What is the purpose of the exhaust fan?

The primary purpose of an exhaust fan is to remove unwanted air from a space and allow it to be replaced with fresher, cleaner air. Unwanted air may be hot, humid, dusty, smoky, odorous or contaminate
Q

Are centrifugal fans better?

Centrifugal fans are not always better than other fans, but they are better for certain types of ventilation duties. In industrial plants and mines, a centrifugal fan is often the best choice when the
Q

Why is it called an exhaust fan?

It is called an exhaust fan because its primary job is to exhaust air from a space. In ventilation engineering, “exhaust” means to remove used, stale, hot or contaminated air and discharge it to a saf
Q

How do you maintain a centrifugal fan?

Maintaining a centrifugal fan means looking after the fan, motor and connected duct system so that airflow, pressure and reliability stay within design limits. Good maintenance is critical in industri
Q

What is the price of underground ventilation fan?

There is no single fixed price for an underground ventilation fan, because cost depends on many technical and commercial factors. When mining companies ask, “How much does an underground ventilation f
Q

What does an intake fan do?

An intake fan is a fan whose main job is to draw fresh air into a space. While exhaust fans pull contaminated or hot air out, intake fans act as supply fans, bringing in outdoor air or air from a clea
Q

Is an axial or centrifugal fan better?

Neither axial nor centrifugal fans are universally better; each is better for specific types of ventilation duties. The right choice depends on airflow, pressure, air quality, layout and control requi
Q

How long can a tunnel be without ventilation?

There is no universal fixed length for how long a tunnel can be without ventilation. Instead, the need for mechanical ventilation is determined by traffic type, traffic volume, tunnel cross-section, g
Q

What does "intake" mean on a fan?

On a fan, the word “intake” refers to the side where air enters the fan before it passes through the impeller and is discharged. Manufacturers often label one end of the housing as “intake” and the op
Q

Why is ventilation needed in tunnels?

Ventilation is needed in tunnels because they are long, enclosed spaces where air cannot circulate freely. Whether the tunnel is used for road traffic, rail, metro, mining haulage, or service vehicles
Q

How to check if a fan is intake?

To check if a fan is intake—that is, to find out which side of the fan air is entering—you should use a combination of visual inspection and simple airflow tests, always keeping safety in mind. You ne
Q

What is the purpose of the auxiliary fan?

The purpose of an auxiliary fan is to provide local or secondary ventilation in areas that the main ventilation system cannot reach effectively. In everyday language, auxiliary means “helping” or “sup
Q

What are the types of vents?

When we talk about types of vents in ventilation, we are referring to the openings and components that allow air to enter and leave a building, duct system or mine. Vents can be simple passive grilles
Q

How do vents work?

Vents work by providing controlled openings for air to move into and out of a building, duct system or underground mine. On their own they are passive components, but when combined with wind, temperat
Q

Are centrifugal fans more efficient?

Centrifugal fans can be very efficient, especially for medium to high-pressure ducted systems, but they are not always more efficient than axial fans. The real answer depends on the duty point, fan ty
Q

What is a duct vs vent?

The terms duct and vent are related but not the same. In ventilation systems for buildings, factories and mines, a duct is the enclosed pathway that carries air, while a vent is the visible opening wh
Q

Are centrifugal fans quieter?

Centrifugal fans are not automatically quieter than other fan types, but they can be engineered to operate quietly, especially when sized correctly and run at moderate speeds. Whether a centrifugal fa
Q

What are the three types of duct systems?

There are many ways to classify ductwork, but a practical way to answer “What are the three types of duct systems?” is to look at their function in the ventilation network. In most buildings, factorie
Q

What are the advantages of axial fans?

Axial fans have several important advantages that make them the preferred choice for many high-volume, low-pressure ventilation applications. In tunnels, mines, power plants and large buildings, axial
Q

What is a ventilation duct?

A ventilation duct is an enclosed passage that carries air from one point of a ventilation system to another. Instead of letting air wander freely, ducts provide a controlled path between fans, air-ha

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