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Mining & Industrial Fan Questions & Answers

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

Q

What is the difference between HP and BHP fan motors?

HP and BHP are related but not identical concepts in fan applications. Understanding the difference between motor horsepower (HP) and fan brake horsepower (BHP) is essential for correct motor selectio
Q

What is the strongest type of fan?

When people ask about the strongest type of fan, they often think of a household fan that blows the hardest. In industrial and mining ventilation, “strongest” usually means the fan that can move the m
Q

What are the disadvantages of a fan regulator?

Fan regulators are simple devices used to control fan speed, but they have several disadvantages compared with modern electronic drives. In small ceiling fans and some light-duty industrial fans they

Q

Should fans be in series or parallel?

Whether fans should be in series or parallel depends on what you need from your ventilation system. Using multiple fans can be a good way to increase performance, but the arrangement must be chosen an
Q

How to make control fan speed?

To control fan speed effectively in industrial plants and mines, you should focus on methods that adjust the fan’s rotation speed rather than just throttling the airflow. True speed control improves e
Q

Do fans in series increase airflow?

Fans in series do not directly increase the free airflow of the fan; they mainly increase the available pressure. This distinction is important. When you place two identical fans one after another in

Q

What is the difference between centrifugal fan and normal fan?

When people ask about the difference between a centrifugal fan and a “normal” fan, they usually mean the difference between a radial centrifugal fan and a common axial or propeller fan. Both are norma
Q

How to maximize airflow with a fan?

Knowing how to maximize airflow with a fan is essential for getting the most out of your ventilation system. Whether you are dealing with a workshop, an industrial plant or an underground mine, the ai
Q

How to fix vibration or wobble in industrial ventilation fans?

Vibration or wobble in industrial ventilation fans is a warning sign that should never be ignored. In mining and plant ventilation systems, excessive vibration can damage equipment, shorten bearing li
Q

What style of fan moves the most air?

When people ask what style of fan moves the most air, they are usually thinking about total volume of air moved, or how strongly the airflow is felt in a room or tunnel. The answer depends on the envi
Q

Are centrifugal fans better than axial fans?

Centrifugal fans are not automatically better than axial fans, and axial fans are not automatically better than centrifugal fans. Each type has advantages and limitations, so the best choice depends o
Q

Are centrifugal fans reversible?

People often ask whether centrifugal fans are reversible, especially when they want a single fan to handle both supply and exhaust duties. In theory you can reverse the rotation of almost any electric
Q

What is the static pressure curve of a fan?

The static pressure curve of a fan is part of the fan performance chart that shows how static pressure varies with airflow at a given speed. It is one of the key tools engineers use to select and appl
Q

How many types of fans are available?

When people ask how many types of fans are available, they are usually surprised by how many variations exist beyond simple household fans. In engineering practice, especially for industrial and minin
Q

Is higher static pressure better for fans?

Higher static pressure is not automatically better for fans. What matters is that the fan can deliver the required airflow at the static pressure demanded by the system. Extra pressure beyond what the
Q

What are those huge fans called?

When someone points at a massive unit on a ceiling or at the mouth of a tunnel and asks, “What are those huge fans called?”, the answer depends on the setting. In large buildings and warehouses, they

Q

Do you want high or low static pressure?

You do not choose high or low static pressure in isolation; the “right” static pressure is the value your ventilation system actually needs at the required airflow. A well designed fan selection match
Q

Which fan type is best?

Asking which fan type is best is a bit like asking which vehicle is best—truck, car or bus. The answer depends entirely on what you are trying to do. In ventilation engineering, the main fan types are
Q

How to plot a fan curve?

To plot a fan curve you need measured or manufacturer data showing how airflow, pressure and power change at different operating points for a given fan speed. From these data you graph pressure versus
Q

Which is better centrifugal fan or ID fan?

When people ask whether a centrifugal fan or an ID fan is better, it is important to understand that an ID fan is not a completely different fan type. In most boiler houses, power plants and heavy ind
Q

What is the static pressure of a ventilation fan?

The static pressure of a ventilation fan is the pressure the fan can develop to overcome system resistance at a particular airflow. It is not a single fixed number for the fan; instead, it varies alon
Q

What is considered a high velocity fan?

A high velocity fan is generally understood to be a fan that produces a concentrated air stream with a relatively high outlet speed, rather than a gentle, broadly distributed flow. Instead of just mov
Q

What is the PQ curve of a fan?

The PQ curve of a fan is the graph that shows the relationship between pressure (P) and airflow (Q) for that fan at a given speed. It is the core part of the fan performance chart and is essential for
Q

What is fast fan speed?

Fast fan speed is a relative term that depends on the size and design of the fan. A small computer fan running at 3,000 rpm is normal, while a large mine ventilation fan running at the same rpm would

Q

How to increase fan airflow?

To increase fan airflow, you must either reduce the resistance of the system, increase the fan’s energy input or select a more suitable fan for the duty. In industrial plants and mines, the safest and
Q

What does a vortex fan do?

A vortex fan is a fan or blower designed to create a spiralling, vortex-like airflow rather than a simple straight jet. By shaping the housing and blades, the fan induces rotation in the air stream, f
Q

What are the 4 stages of mechanical ventilation?

In building, industrial and mining applications, mechanical ventilation can be described in four practical stages: intake, treatment, distribution and exhaust. Seeing the system as these stages helps

Q

What are the three fan laws?

The three fan laws, also known as the fan affinity laws, describe how airflow, pressure and power change when the speed or size of a geometrically similar fan is altered. These simple relationships ar
Q

How much does it cost to repair an industrial ventilation fan?

The cost to repair an industrial ventilation fan can vary widely, from a few hundred to several thousand dollars or more. The final price depends on fan size, what has failed, the cost of parts, labou
Q

What metal is used in fans?

Several metals are used in fans, depending on the size, duty and environment of the ventilation system. The choice of material affects strength, corrosion resistance, weight, cost and safety. In indus

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