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Buying Guide to Blowers & Industrial Fans - Types, Applications, Manufacturers and Suppliers

An Overview - Blowers and Industrial Fans

Industrial fans and blowers are majorly used for industrial process requirements and for ventilation. In a fan system, fans generate a pressure to move air (or gases) against a resistance caused by ducts, dampers or other components. Energy is received by a fan rotor from a rotating shaft and then it is transmitted it to the air.

Industrial Blowers are electro-mechanical or mechanical devices that are used to incite gas flow through process stacks, electronics chassis, ducting and so on. Gas flow can be induced wherever flow is needed for aspirating, cooling, ventilating, exhausting, and conveying etc.

While choosing the best industrial blower, the key specifications required to consider are the anticipated application, port design, blower type as well as the parameters of flow capacity, dimensions, electrical ratings and so on.

Blowers are used to cool electronic enclosures, increase airflow on engines, and they are configured in a variety of designs such as centrifugal flow or rotary lobe styles.

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Difference between Blowers, and Industrial Fans

Industrial fans and blowers are differentiated by

•    Method they are used to move the air, and
•    System pressure they must operate against

As per American Society of Mechanical Engineers (ASME) -  the specific ratio i.e. the ratio of the discharge pressure over the suction pressure is used for defining the industrial fans, blowers.


Equipment
 
Specific Ratio Pressure rise (mmWg)

Industrial Fans
 
Up to 1.11 1136

Blowers
 
1.11 to 1.20 1136 – 2066


Types of Blowers

a) Centrifugal Blowers

Centrifugal blowers are machines whose major function is to provide and accommodate a large flow of air or gas to various parts of other structures or buildings. They use high-speed impellers or blades to transmit velocity to air or other gases.

These type of blowers offer a number of blade orientations, including backward curved, forward curved, and radial. Some centrifugal blowers are directly coupled to drive motors.

Applications:

•    Centrifugal blowers are used for combustion air supplies, on cooling and drying systems, for fluid bed aerators, with air conveyor systems, for dust control, etc.
•    They are built as close-coupled units.

b) Positive Displacement Blowers

Positive Displacement blowers are alike positive displacement pumps. They use mechanical power to squeeze fluid and thereby increase pressure and/or velocity.

There are two types of positive displacement blowers. They are:

i) Rotary Vane

ii) Rotary Lobe

Positive displacement blowers are often driven by direct-coupled electric motors but they can be driven by gas engines, hydraulic motors, etc in unusual circumstances.

Applications: Positive displacement blowers are also used in pneumatic conveying, and for sewage aeration, filter flushing, and gas boosting, as well as for moving gases of all kinds in the petrochemical industries.

Types of Industrial Fans

Industrial fans fall into two general categories. They are:

a) Centrifugal flow

b) Axial flow

In centrifugal flow, the direction of the airflow is changed twice. i.e. firstly while entering and second while leaving (forward curved, backward curved or inclined, radial).

In axial flow, air enters and leaves the fan with no change in direction (propeller, tube axial, vane axial).

Types of Fans, Characteristics, and Typical Applications

Factors to be considered in the selection of Blowers

Blowers are specified on the basis of pressure and flow rate. Blowers can be picked based on the ratio of system inlet pressure and outlet pressure.

Here are some of the important attributes to be considered in the selection of blowers:

1) Blower Type

2) Blades

3) Flow Capacity

4) Maximum Operating pressure

5) Port Design

6) Additional Features

Key Players | Top Suppliers and Manufacturers of Industrial Fans & Blowers

Some of the prominent players operating in the global industrial fans and blowers market are:

1) Pacific HVAC Engineering Pty Ltd

For over 25 years, Pacific HVAC have been helping people just like you. Through an in-house ecosystem of dedicated engineers, collaboration with industry leaders and old fashioned innovation, we’ve become Australia’s leading providing of HVAC equipment. Fans, attenuators, air condition, chillers and more – whatever it is you need, we go bespoke to give you the best solutions possible.

2) Delta Electronics (Netherlands) BV

Since 1988, Delta has dedicated its engineering resources in to developing innovative and quality cooling fans and thermal management solutions for IT, telecom, automotive, industrial, and consumer electronic products and equipments. Our broad product range covers axial fans size ranging from 25mm-250mm, blowers from 30mm-250mm, and slim blowers. With patented blade design, innovative structure design, and "Sensflow" control, Delta has helped our customers greatly increase cooling performance and reduce system acoustic noise. To support customer's special requirements, we also make hot-swappable fans, fan trays with intelligent controller, and fan modules designed to fit customer system for first-rate efficiency.

3) Universal Blower Pac Inc

Universal Blower Pac, Inc. has been providing innovation for manufactured blower systems and engineered solutions since 1979. Our unique approach means engineers listen first and then match your needs to the most efficient and affordable solution.

Our worldwide clients receive more options, targeted solutions and quality services that go beyond standard expectations. Universal Blower Pac was founded on the principle that every proposed system faces unique problems, and that is why flexibility in manufactured blower solutions is the cornerstone of our approach.

4) Marsh Electronics, Inc

Since 1937, Marsh Electronics has proudly delivered extremely high-quality products, service, and value to our customers. This philosophy has helped us grow into a regional industry leader, distributing a wide range of electronic components and solutions throughout the north central United States.

As our many satisfied customers have come to know, Marsh Electronics offers not only products and services you can depend on, but also a convenient, cost-effective partnership that will help your business grow.

5) Howden American Fan Company

Howden American Fan Company is located in Fairfield, Ohio USA (Cincinnati area), and is part of Howden, an international company providing solutions for industry and infrastructure applications worldwide. The quality and reliability of our products are built upon a solid foundation of unrivaled application expertise and technical leadership.

Since our beginning in 1969, Howden American Fan Company has always put customer relationships first. We do this by providing the highest quality service to you, our valued customers. Experienced sales representatives are located throughout North America to provide you with local support and assistance. These representatives work closely with our own Sales Team, Customer Service and Aftermarket Department to insure the best possible service before, during, and after each sale.