Industrial Fans for Cooling

Industrial cooling fans are useful for a number of businesses and industries. If you or your any family member operates a parking center, then you need these types of fans to keep the unit well ventilated. An industrial cooling fan has been considered as an efficient means of air circulation to thwart people being overcome by fumes from exhausts, etc. People involve in transporting livestock from one location to another must require these fans as heat can cause damage to your animals. It is your duty to keep your animals relaxed as they are completely dependent on you for their well-being.

People involve in operating a warehouse or a loading dock face a number of problems to keep the temperature in control. They must need to introduce a comfortable working environment so that their employees can work and live in with comfort and peace. Sometimes, normal air conditioning or heating systems can be proved as an expensive option so that people are advised to look for industrial cooling fans. Apart from circulating the air and moving the hot or cold air around the building, the expenditure of running fans combined with a heating and air conditioning system seems to be cheaper than a standalone HVAC system.

If you are an employer and working in a number of industries, then your first duty is to take care of your employees by providing comfortable working surroundings. It doesn’t signify you have to provide a lot of fancy couches and comfy seating, but it does exhibit that you cannot expect a person to work in overheated conditions. In fact, an employer needs to provide decent air quality and conditions for his/her employees to work in. These are the reasons for which the demand of industrial cooling fans has been increased to the great extent.

To purchase an industrial cooling fan, customers need to consult online stores. A simple search through the internet brings them a number of online stores selling the products and services at affordable rates. In addition to their products, their services are unique and exclusive in the market. So, it is advised to make search and see results.

The Various Applications Where Ventilation Fans Are Used:

•The Ventilation Fans are extensively used in various activities such as, fabricating, manufacturing, mining, etc. These Ventilation Fans are used for the removal of dust, fume, and smoke particles from the atmosphere and to make it free from suffocation. Some of the manufacturing units where the Ventilation Fans are used for the mass extraction of fumes and dust particles are, Textile Mills, Steel Mills, Wood product Mills, Ceramics and Aerospace material units. These units install huge turbines and impellers to move the extremely large volume of air.

•Crude Oil and Petrochemical Refineries have to deal with fuels and solvents which are extremely toxic, flammable, and unpredictable. Here, Ventilation Fans are required for the functioning of sophisticated Air Entrainment systems.

•The Mining and Quarrying industries are always immensely reliant on the Ventilation Fans. The Coal dust in these mines can be very explosive if it somehow catches fire. This risk is reduced by the dust removal, which is done by the Ventilation Fans. Very powerful blowers and bulky turbines are implemented to ventilate the mines and quarries.

•The workers in Biological, Chemical, and Pharmaceutical industries have to struggle with biological, chemical, and various other physical risks. In such environment, Ventilations Fans come to their rescue.

Industrial Fans

Industrial Fans will always act like the tough weapons to fight against the toxic and hazardous work area of every small and large industry. The various forms of Ventilation are performed by Air Fume collection system, Robotic welding hoods, Dust collection units, Air Filters, Chemical Scrubbers, Fume containment systems, etc. Ventilation Fans Manufacturers and Suppliers nowadays offer very efficient models for individual needs of industries. Any industrial buyer just has to go online and contact the Industrial Ventilation System Manufacturer in India who can meet the needs exactly and get installation assistance as well.

Additional information can be found at the Industrial Fan Blower company web site http://www.industrialfanblower.net

Oleg Tchechel
Developer of Industrial Air Make-Up Units
Industrial Fan Blower Co.
asap@buffalofan.com
http://www.industrialfanblower.net/cbd_products_std.htm
http://www.industrialfanblower.net/cbd_about_us.htm

Industrial Ventilation Fans

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asap@buffalofan.com

industrialfanbl

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Industrial Air Curtains

The idea of having an invisible barrier across the doorway to enable unimpeded access yet effectively prevent temperature flow, dust, odours and insects to cross, is appealing in itself but add to this the cost-saving in reducing energy use and the idea becomes more compelling, especially as air curtains are relatively inexpensive items.

Appropriate for industrial applications

Keeping warm air out of insulated cold stores or refrigerated facilities is the Number 1 objective yet a mockery is made of this premise when freezer of chiller doors are left wide open and, in some cases, chocked open to facilitate the movement or storage of perishables.

Self-generated pressure evolves from a non-circulatory type of air curtain as the jet induces ambient air into the stream. When the air curtain is installed on the outside of a cold room, the air spills back into the room and continues to do so until the pressure builds up to such a point that the air stream deflects to the outside.

Pressure Form Stack

The pressure-form-stack effect evolves when the cold air in the room is denser than the warmer outside air. The higher the ceiling, the higher the pressure becomes inside the cold room. The velocity of the air curtain should therefore be high enough to compensate for the outward pressure at the lower part of the cold room.

Wind pressures occur because of the conversion of the velocity pressure in the wind into static pressure. Of particular significance is the stability of the air curtain, which is directed by its outlet momentum. The curtain of air must be able to withstand pressure variations between the inside and the outside of the cold room. The outlet momentum should be sufficiently sustained and strong enough to stabilise the air at the floor. It is therefore essential to incorporate controls in the design of the air curtain to increase the strength of the velocity and ensure a stiff curtain of air and to decrease the velocity to prevent unnecessary heat and moisture transfer at the door.

Refrigeration Applications

In refrigeration applications, a high volume of turbulent air hitting the floor tens to form ice on the floor of freezers – this is not desirable or necessary so air flow needs to be adjusted so that it barely hits the floor. This can be accomplished by adjusting air louvers or fan speed to obtain the desired velocity. Drafts are eliminated by ensuring that air flow is vertical. The air curtain may be mounted on either the warm or cold side of the cooler with equal effectiveness.

The volume of air flow varies according to temperature difference between internal and external air and air exchange is therefore caused by thermal temperature differences. Using known values for the indoor and outdoor temperature difference, the densities, pressure differences and ultimately the air flow through the opening can be calculated.

Properly installed air curtains cut cold air loss and reduce humidity, thus reducing the load on refrigeration or air-conditioning plant and thereby saving energy by reducing compressor running time, maintenance, gas and recharging intervals. These units are an alternative to fast-acting roller doors and PVC slat curtains, and can be situated above or to the side of industrial doorways to create a powerful seal across the opening, keeping cold air in while providing complete visibility and access. This means that forklift drivers don’t have to get out of their cabs to open and close doors so that moving from one area to another is a lot easier and productive. Unlike plastic slat curtains, which quickly become opaque with use, an air curtain provides 100% visibility at all times. Units have been installed in loading bays, factories, hangars and production facilities, such as food processing and pharmaceuticals, where differential temperatures are encountered overseas.

Canadian Air Systems Co. is a well known designer and manufacturer of industrial and commercial air curatain systems and environmental air barriers.

For special applications Canadian Air Systems offer tangential air curtains to achieve high volume alminar air flow – to create permanent environmental air barriers.

For additional information please refer to http://nis-co.com/Index.html.

Oleg Tchetchel
Ventilation Engineer
Canadian Air Systems
http://www.nis-co.com
http://nis-co.com/aircurtain/Index.html

Air Curtains for Large Buildings Doors

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nis-co@nis-co.com

niscom

nisco@primus.ca

kuzmanestor

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Industrial Propeller Fans and Industrial Blowers

Electrical generators require the most reliable equipment for their air-cooling and ventilation needs. The fans used in these systems are mounted onto gas-turbine generator packages for use in power plants as well as on cruise ships, oil rig platforms, and mobile generators. These systems are loaded onto tractor-trailer rigs or barges and moved to a site to generate power for events like the Super Bowl and concerts. Manufacturers of these gas-turbine generators are realizing it pays to have the right fan for the job from the start and are turning to Buffalo Fan to provide these unique solutions.

Resilient Industrial Blowers

A key requirement for these applications is that the fans need to be exceptionally corrosion resistant to withstand these severe environmental factors.

Noise attenuation is a major issue for power generators, both to protect workers’ hearing and to keep operation at the quietest level for any surrounding residential or business communities.

High Performance Fans & Blowers

Power generation is a complex process. The power generation fan / blower equipment should be tough enough to avoid operational failure and to minimize installation and repair work. The rugged, high performance fans Buffalo Fan provided to a state-of-the-art hybrid energy center, were ideal for the task. Aerovent was chosen for this project because of their reputation for building large custom fans for extreme industrial applications. The energy center’s primary requirement was that its chosen vendor be able to design and build a set of the most rugged, efficient roof ventilators within budget. Most roof ventilator fans last between 10 and 20 years when properly maintained. Because of the permits and cost involved in performing maintenance work on the roof of a power plant, they wanted their fans to have a longer life span (up to 40 years). This lifespan requirement meant that the fans had to be constructed using industrial grade materials and components.

Propeller Fans

Northern Fan propellers provide equal airflow in both directions. Other companies’ fans have a standard-exhaust one-direction propeller and are run backwards for the supply mode, producing about 40 percent of exhaust-mode airflow. ABuffalo Fan blowers produce 100 percent airflow in either direction. Aerovent also produced an integrated electrical control system guaranteed to work with its fans instead of the power plant having to acquire a separate system from another source. The system features an onboard starterdisconnect switch, which boosts the motor’s start and can be easily disconnected.

Industrial Blower Safety

Fire safety is a challenge in any environment, and especially so in a power plant. In case of a fire, the first priority is to ensure the safety of employees. Another goal is to be able to salvage expensive equipment in the building. With ventilation fans, if the motor fails during a fire, it is more beneficial if the fan’s dampers automatically fail in the “open” position, and allow smoke to escape.

Custom Industrial Fan Design

Northern Fan’s expertise in custom-building fans for complex applications, like this energy center, allowed them to design and construct a special fire damper for the fans. When the motorized damper is activated, a metal linkage arm attached to the damper blades moves to open or close the damper.

Northern Fan Co. custom made damper features a fusible linkage arm with a “soft metal” section in the link. When temperatures reach 212 degrees (as in the case of a fire), the soft metal plate fails, breaking the linkage, and a heavy counter weight swings the damper into the “open” position.

Additional information can be found at the Northern Fan company web site http://northernindustrialsupplycompany.com/company.html

Oleg Tchetchel
Industrial Air Handling Systems Engineer
Northern Fan Co.
nis@primus.ca
http://www.northernindustrialsupplycompany.com/products/heat_exchangers.html
http://northernindustrialsupplycompany.com/products/humidifiers.html

Turbo Pressure Blower

nis@primus.ca

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buffalofancom

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Centrifugal Industrial Blowers and Centrifugal Fans

Centrifugal Industrial Fans and Blowers

The majority of industrial centrifugal fans and blowers can be grouped into three broad categories; custom engineered, pre-engineered and OEM. All are supplied to the same exacting standards.

Centrifugal blowers and fans

Canada centrifugal blowers and fans are found throughout the world operating in industrial processes where performance, reliability and maintainability are of paramount importance. Ranging in diameter from 12″ to over 96″, and with a variety of impeller designs, control systems and layout options, they form a comprehensive series of centrifugal fans to satisfy virtually all industrial applications.

Industrial Centrifugal Fans

Canada Blower pre-engineered centrifugal fans are selected aerodynamically from a range of standard sizes and configured mechanically to meet the customer’s requirements. This allows to provide a cost-effective solution to moving air or gas where the additional cost of a custom engineered fan is not justified either by higher efficiency or mechanical strength. Centrifugal fans store significant amounts of energy when running, and if the fan is not correctly matched with the operating conditions the consequences for the plant operator can include excessive power consumption, noise generation or mechanical failure, resulting in a significant loss of revenue.

Industrial Centrifugal Blowers

Each of Canada blower designs has been exhaustively tested, aerodynamically and acoustically. The mechanical design is supported by modern analysis techniques, such as finite element analysis. Many options are available in terms of drive arrangement, output control, layout and auxilliary equipment, to give flexibility to the plant designer. All major impeller configurations are supplied including aerofoil, backward curved, backward inclined and radial tipped blade designs.

Centrifugal Fans

Canada Blower custom engineered centrifugal fans are designed specifically for each contract which allows us to apply a combination of experience, advanced design techniques and a knowledge of the operating conditions to select the optimum fan in terms of capital cost, running cost, maintainability and reliability. Large centrifugal fan rotors store significant amounts of energy when running. If the fan is not designed and manufactured correctly, and matched with the operating conditions, the consequences for the plant operator can include excessive power consumption, noise generation, vibration and mechanical failure, resulting in a significant loss of revenue.

Centrifugal Blowers

Each of centrifugal blower or fan designs has been exhaustively tested, aerodynamically and acoustically. Empirical design formulae that have been validated over many years are backed up with modern analysis techniques, including finite element analysis, dynamic response analysis and computational fluid dynamics.

Heavy-duty Centrifugal Blowers & Fans for Industrial Applications

It is this combination of knowledge and experience that has resulted in Canada Blower becoming a global market leader in heavy-duty centrifugal blowers and fans.

Additional information can be found at the Canada Blower company web site http://www.canadablower.com

Susan Terlitski
Industrial Air Make-Up Systems Designer
canadablower@canadablower.com
Canada Blower Co.
http://www.canadablower.com/blowers/index.html
http://www.canadablower.com/fans/index.html

Preengineered and Custom Canada Blower Fans

canadablower@canadablower.com

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buffaloblower@buffaloblower.com

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Large Industrial Fans Supplier & Manufacturer

Large Industrial Fans

Based on the specific process, Northern Industrial Supply Fan products can be customized to meet the most demanding mining applications including underground ventilation, dust control systems, mineral processing, and for cooling major components in engines, braking systems and drilling equipment. Northern Fan designs its fans with a number of special features such as custom motors-flex connectors, C-Damper actuators, explosion proof motors and a wide range of abrasion resistant, spark resistant and high temperature construction features. Transportation tunnels and mining tunnels must be properly ventilated — both during their construction and in ongoing use. The aerodynamics involved in ventilating these tunnels can be very intricate and require special attention to detail, especially when lives are at stake.

Industrial Blowers and Fans Supplier

By leveraging its engineering experience and application expertise, Northern Fan Co has become a leading supplier of fans for all types of automobile and train tunnel ventilation. Wind tunnels are designed to model weather patterns and test wind resistance and noise suppression for all types of vehicles and aircraft. These sophisticated fans operate at low noise levels and deliver uniform velocity profiles to the test piece. Because of its engineering resources and testing capabilities, Northern Fan Co. is one of the only fan manufacturers that can design, build and validate the proper air moving equipment for wind tunnel applications.

As application experts in the field of air moving equipment, Buffalo Fan is a major supplier of fans to the power generation industry, and provides a full line of fans for boiler systems, Selective Catalytic Reduction and desulphurization processes, dust collection, turbine cooling and exhaust, bus cooling, combined cycle gas turbines , mist collection, and enclosure ventilation. Northern Fan can also repair and provide retrofit parts for fans from a variety of other manufacturers.

High Temperature & High Pressure Blowers and Fans

For day-to-day operations, nuclear power plants rely on numerous fans — all of which must be of superior quality in terms of durability, dependability, safety, and ease of maintenance. Northern Fans are designed for various applications in nuclear plants including motor / turbine cooling, material processing / refining, reactor vessel cooling, hot cell pressurization, battery room ventilation, general exhaust and make-up air, HVAC, and several safety-related systems. Our in-house Nuclear Quality Assurance (NQA) program ensures that all of our products and components are compliant with industry regulations. In addition, Northern Fan is one of the only fan manufacturers that can meet the nuclear industry’s stringent documentation, inspection and verification requirements.

Largest North American Industrial Fans & Blowers Supplier

Northern Fan is the largest North American supplier of fans to both Industrial and Commercial market OEMs. OEMs prefer these fans, as Northern Fan offers the most comprehensive fan line from heavy industrial to light commercial. Because of extensive expertise in mass customization, Northern Fan can tailor our products to meet the many needs of equipment manufacturers in any market.

Original Equipment Manufacturers require specially engineered products to meet specific demands for size, fit-up, efficiency, sound and durability. Northern Fan is able to provide the right fan for every application and modify as needed for the specific installation.

Large Industrial Fans & Blowers Uses and Applications

Thus, Northern Fan products are used in a wide variety of original equipment, including:

– HVAC & Air Handling Units
– Custom Air Handling
– Packaged Units
– Make-Up Air
– Energy Recovery Units
– Lab Exhaust

Equipment for Process and Manufacturing:

* Dryers
* Ovens
* Freezers
* Welding Exhaust
* Spray Booths
* Dust Collection
* Environmental Pollution Control

Additional information can be found at the Northern Fan company web site http://www.northernindustrialsupplycompany.com/company.html

Oleg Cthetchel
Air Process Systems Engineer / Designer
Northern Fan Co.
nis@primus.ca
http://www.northernindustrialsupplycompany.com/burlington/index.html
http://www.northernindustrialsupplycompany.com/burlington/request4.html

Ventilating Fan

nis@primus.ca

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Industrial Centrifugal Blower Fans & Axial Fans

Backward Inclined Blowers

Backward Inclined Fans – Simple flat blades, but backwardly inclined to match the velocity pattern of the air passing through the fan wheel, which results in high-efficiency operation. These fans are typically used in high-volume, relatively low-pressure, clean air applications.

Centrifugal Blower Fans

Airfoil Centrifugal Fans are used for a wide range of applications in many industries, hollow-bladed airfoil fans are designed, engineered and tested 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.

Backward Inclined Blower Fans

Backward Curved Fans – Efficiencies nearly as high as the airfoil design. However, single-thickness metal blades prevent the possibility of dust particle buildup inside the blade. These fans can be built with long-lasting erosion-resistant liners. The robust design allows high tip-speed operation, and therefore this fan is often used in high-pressure applications. This design frequently offers the best compromise for long life and high efficiency.

Radial Blade Blowers

Radial Blade Blowers – Flat blades oriented in a radial pattern. These rugged fans offer high pressure capability with average efficiency. They are often fitted with erosion-resistant liners to extend the rotor life. The housing design is compact to minimize the floor space requirement.

Forward Curve Blower Fans

Forward-Curved Radial Tip Fans – This rugged design is used in high-volume flow rate applications when the pressure requirement is rather high and erosion resistance is necessary. It offers medium range efficiencies. A common application is the dirty side of a baghouse or precipitator. The design is more compact than airfoil, backward curved or backward inclined fans.

Industrial Blowers

Paddle-Wheel Blowers – This is an open impeller design without shrouds. Although the efficiency is not high, this fan is well suited for applications with extremely high dust loading. It can even be offered with field-replaceable blade liners from ceramic tiles or tungsten-carbide. This fan may also be used in high-temperature applications.

Forward Curve Blowers

Forward-Curve Fans – This “squirrel cage” impeller generates the highest volume flow rate (for a given tip speed) of all the centrifugal fans. Therefore, it is often the smallest physical package available. It is commonly used in high-temperature furnaces.

Industrial Exhaust Fans

Industrial Exhausters – Relatively inexpensive, medium-duty, steeply inclined flat-bladed fan for exhausting gases, conveying chips, etc.

Pre-Engineered Blade Blower Fans

Pre-engineered Fans – are series of fans of varying blade shapes that are usually available in only standard sizes. Because they are pre-engineered these fans may be available with relatively short delivery times. Often, pre-engineered rotors with various blade shapes may be installed into a common housing. These are often available in a wide range of volume and pressure requirements to meet the needs of many applications.

Industrial Pressure Blowers

Pressure Blowers – High-pressure, low-volume blowers used in combustion air applications in furnaces or to provide “blow-off” air for clearing and / or drying applications.

High Pressure Blowers – Surgeless

Surgeless Blowers – High-pressure, low-volume blowers with a reduced tendency for “surging” even at severely reduced flowrates. This allows extreme turndown (low-flow) without significant pulsation.

The main types of Axial Flow Fans include:

Axial Fans – High Temperature

High-Temperature Axial Fans – High-volume fans designed to operate against low flow resistance in industrial convection furnaces. These are found in either single-direction or bi-directional designs. Extremely rugged, they are most often used in high-temperature furnace (up to 1800 degF) applications.

Tube Axial Fans

Tube Axial Fans – Cataloged high-volume low-pressure fan line with a wide range of available sizes. Suitable for temperatures up to 250 degF.

Vaneaxial Fans

Vaneaxial Fans – Axial flow fans with higher pressure capability due to the presence of static vanes.

Variable Pitch Axial fans

Variable Pitch Axial fans – Axial fans with manually adjustable blade angles. This allows operation over a much wider range of volume/pressure relationships. The blades are adjusted periodically to optimize efficiency by matching the blade pitch to the varying conditions for the application. (Often used in mining applications).

Variable Pitch on-the-fly Axial Fans

Variable Pitch on-the-fly Axial Fans – These are similar to “Variable Pitch Axial Fans” except these include an internal mechanism that allows the blade pitch to be adjusted while the fan rotor is in motion. These versatile fans offer high-efficiency operation at many different points of operation.

Variable Speed Fans

Variable Speed Fans – All of the fans described above can be used in conjunction with a variable speed driver. This might be an adjustable frequency AC controller, a DC motor and drive, a steam turbine driver, etc. Flow control by means of variable speed is typically smoother and more efficient than by means of damper control. Significant power savings (with reduced cost of operation) are possible if variable speed fan drives are used for applications that require reduced flow operation for a significant portion of the system operating life.

For additional information please refer to http://www.northernindustrialsupplycompany.com/burlington/request5.html

Oleg Tchetchel
Industrial Ventilating Designer
Northern Industrial Co.
http://www.northernindustrialsupplycompany.com/burlington/request7.html
http://www.northernindustrialsupplycompany.com/burlington/request2.html

Centrifugal Fans and Axial Fans by Northern Industrial Blower

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fan@cogeco.ca

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Industrial Blowers in Ventilation

In case of temperatures above 220 degrees and metal and if pressure is above 10 wg (water gage), typical recommendations in the construction of industrial blowers are generally fiber glass.

Industrial Blowers in the Environment

By the size of the environment in which it is to be operated the size of the blower may be regulated. For example, to house both the fan and its power supply, some units are big enough. Mainly used for cleanups and in spaces that require temporary circulation or air transfer, there are smaller and portable blowers.

To circulate the movement of air and gas in ventilation applications, industrial blowers are mainly used. To replace impure or contaminated air with fresh air by swirling it around is their main function. Medical, agricultural, chemical, oil and gas, mining and construction, automotive, food processing, almost every industry uses blowers for different purposes such as drying, reducing the levels of heat, reducing smoke and odors, processing and controlling gaseous fumes.

For industrial area, air conditioning can often become too large of an expense but now with technological advancements, these days industrial fans are being that bring some much needed relief. Industrial electric fans manufacturers are coming up with fans that are quite helpful and advantageous for places where dampness, heat stratification, and stagnant air are common and recurring problems. Also, these fans can be used for high static pressure. These units replace air as well by blowing out the old and stagnant air for a wide area that otherwise would collect this air without replenishing it in entirety which is also referred to as an industrial electric blower.

Industrial Blowers for Ventilation

In the removal of pollutants like carbon monoxide, dust and metal particles, sulphur dioxide, nitrous oxides, sulphuric acid, and hydrocarbon solvents, the industrial fans are very helpful. In comparison to an air conditioner, industrial electric fans do not use as much electricity. They also circulate air and cool it at a fast rate for a large space. The larger motor of an industrial fan is actually guaranteed to save energy costs on any industrial ventilation solution with high-powered, energy-efficient motors.

Able to generate a substantial volume of air with minimal vibration in a limited space, like the ones used in air conditioning, heating, ventilation and vacuum cleaners, a centrifugal blower is a common device. Through its center, a centrifugal blower intake air and directs it through a perpendicular opening in the housing. Thus blowers are necessary in various industrial places.

Additional information can be found at the Industrial Fan Blower company web site http://industrialfanblower.net

Oleg Tchechel
Developer of Industrial Air Make-Up Units
Industrial Fan Blower Co.
asap@buffalofan.com
http://www.industrialfanblower.net/cbd_about_us.htm
http://www.industrialfanblower.net/cbd_links.htm

Blowers In Industrial Ventilation

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Industrial Propeller Fans

Industrial Propeller Fans – Belt Drive & Direct Drive

Northern Fan Canada Axial Filtered Air Vents are designed for low pressure building ventilation, room ventilation, industrial ventilation, commercial ventilation and industrial process application. Typical applications include heat, smoke, and fume removal; process ventilation and process air handling; proces drying with ambient or preheated air; comfort process cooling and general ventilation of buildngs. Available in direct drive arrangement 4 and corresponding belt drive arrangement 9. Sizes from 6 thru 96. Capacities: to 350,000 CFM. Static pressure to 2.5 inches water gauge.

Spark Resistant X-proof construction: wall fan for non-sparking x-proof applications is supplied in AMCA A (all aluminum or monel airsteram), AMCA B (aluminum wheel, or monel wheel), or AMCA C (buffer type) spark resistant construction. For AMCA A applications wheel is made of non-ferous material with monel shaft and special x-proof motor.

Propeller Fans – Wall Fans

High temperature construction: wall fan is avaialble in high temeparture construction with high temperature motor and steel prop, or stainless steel prop.

Corrosion resistant construction and chemical duty construction: for corrosive environment wall fans are avaialble in 304 SS, 316 SS, or 316 L stainless steel construction. For chemical process applications wall fans are available in fiber reinforced plastic (FRP) construction, or in polypropylene construction, or in plastic.

Propeller Fans – Wall Fan Accessories

Wall fan accessories: wall housing, wall cabinet, heavy gauge housing, extended wall housing, wall housing access door, inlet guard, outlet guard, caged guard, fixed louver, shutter, manual shutter with pull chain and quadrant lock, gravity automatic shutter, motorized shutter, back draft damper, shutter motor, BELIMO motor, NEP motor, Multiproducts motor, Delay switch, Speed controller, VFD, intake hood, discharge hood, weather hood, hood bird guard, hood bird screen, insect screen.

Controls and drives: pressure switch, end switch, electrical damper motor, delay switch, pneumatic actuator, speed control, vfd control, motor starter, carbon monoxide sensor, oxygen sensor, electronic gas sensors and others.

Propeller Fans – Wall Fan Speeds

At this juncture it is prudent to reiterate that a fan running at a particular speed can have an infinite number of operating points all along its characteristic curve. The fan will interact with the system to produce an operating point at the intersection of the system curve and the fan curve. Note that it is the system in which the fan is installed that will determine the operating point on the fan curve. Thus it is vitally important that the system designer accurately determine the system losses in order to ensure that the actual air flow rate is as close as possible to the design air flow rate.

Additional information can be found at the Northern Fan web site http://northernindustrialsupplycompany.com/

Oleg Cthetchel
Canadian Industrial Ventilating Engineer

Northern Fan Co.
http://northernindustrialsupplycompany.com/

Propeller Wall and Roof Ventilators – Northern Fan

Oleg Tchetchel

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Roof Exhaust Fans and Roof Ventilators

Roof Exhaust Fans & Ventilators

Proper ventilation requires that there be a movement or circulation of the air within the space and that the temperature and humidity be maintained within a range that allows adequate evaporation of perspiration from the skin. It was formerly believed that the discomfort, headache, and lethargy commonly associated with poor ventilation were caused entirely by the increase in the amount of carbon dioxide and the decrease in the oxygen content of the air. There is evidence to show, however, that the deleterious effects result largely from interference with the heat-regulating mechanism of the body. Lack of air currents and the increase in relative humidity and temperature (especially noticeable in crowded, poorly ventilated places) prevent normal evaporation of perspiration and loss of heat from the surface of the skin.

A simple roof ventilator is essentially an opening in the roof with a cover to keep out rain and to prevent winds from interfering with its functioning. Natural convection is an appreciable aid to ventilation in a large building only if it contains sources of large amounts of heat. A further useful adjunct is a fan fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain, to remove dust, cuttings, or other waste, or to provide draft for a fire. The addition of distribution ducts to the fan and a system for forcing air into the building provides greater efficiency. Outlets are designed to attain maximum mixing of air and to move large amounts of air at low velocity so that temperature layers are eliminated. Factories have special suction hoods and enclosures to draw away localized dust, fumes, and heat. Incoming air may be cleaned of dust by filters or electrostatic precipitators.

Roof Exhaust Fan Ventilation

Natural ventilation depends on winds outside and convection currents inside a building. Winds raise air pressure slightly on the windward side of a building and lower it slightly on the lee side. The pressure difference promotes circulation into the building on the windward side and out of it on the lee side. Convection currents are caused by the sinking of colder and therefore heavier air, which displaces the warmer air. A building may have a roof ventilator to allow the rising warm air to escape. If there is an opening to the outside at the bottom of the building, fresh, cool air will be drawn in.

Deep mines, underwater tunnels, and other subterranean and submarine environments require elaborate mechanically operated systems for maintaining the air supply in a healthful condition. The lives of those working in, or traveling through, such areas depend upon a constant supply of fresh air; not only must the systems used be highly efficient, but there should be provision for emergencies in case of failure of the apparatus in operation. An outgrowth of studies of problems of ventilation is the development of methods of air conditioning heat pump is a reversible device that does mechanical work to extract heat from a cooler place and deliver heat to a warmer place. The heat delivered to the warmer place is, approximately, the sum of the original heat and the work done.

Such systems, unlike ordinary methods of ventilation, are independent of outdoor atmospheric conditions and can, therefore, maintain the indoor atmosphere at the most healthful temperature and humidity and can free the air of dust and other undesirable materials. They accomplish this, however, at a considerable cost in energy.

Roof Exhaust Fan Ventilator Uses

Roof ventilators are another option. They work in both summer and winter. In summer, roof ventilators reduce the build up of heat in the ceiling spaces, reducing the heat load on your insulation, meaning that the insulation works more effectively. In turn, you will save on your electricity bills as the air-conditioning systems will not have to work as hard. In winter, it reduces the amount of condensation that forms when warm, moist air from exhaust fans meets cold surfaces. Roof ventilators will also reduce the amount of corrosion and timber that occurs because of condensation. Roof ventilators should be installed where there is sarking underneath tiled roofs, when metal deck roofing is used, and when there is evidence of condensation in the roof spaces or ceilings.

A reliable ventilation system that can operate during a fire is both vital and essential. It prevents smoke logging, allows people to escape quickly, minimizes damages to property and contents and enables firemen to attack the fire without hindrance. Such power roof ventilators have the added advantage of providing normal day to day ventilation and in many cases can also be fitted with duct work for use in multi storey buildings.

Additional information can be found at the Northern Industrial web site http://northernindustrialsupplycompany.com/products/ilg.html.

Oleg Cthetchel
Canadian Industrial Ventilating Engineer

Roof Exhaust Fan Ventilators

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Radial Blowers

Radial Blowers and Radial Fans

Radial Blower fans are used for many purposes these days whether that be for items found in most households or in cars or factories. They play an integral part in our everyday lives and will do so for many years to come.

Northern Industrial Co. is a world wide distributor of industrial process ans OEM fans and blowers, as well as fan components; including high pressure blowers, high temperature fans, spark resistant and explosion proof ventilators, tubeaxial and vaneaxial high pressure ventilators. Canada Blower also does existing fans and blowers repairs, re-build, as well as dynamical wheels balancing.

Radial Blower Applications

A radial Blower fan is used in a large number of different industries, whether that be for the fan in your car or a fan in your computer to keep it from heating up too much. The word Radial Blower means spreading out of a common centre which is how most fans work. They can also be used in large industrial type settings where there is a need to push either cooling air or just making sure there is air flow through a certain area.

Radial Blower fans can also be known as a centrifugal fan, which is made up of three different types of blade settings. They are the straight steel plate paddle wheel, the forward multi-vane multi-blade and the backward turbo vane. They are also used in Industrial type situations such as factories, large underground carparks and gymnasiums. They can be used in lots of different situations where there are large enclosed open spaces which need some type of circulation, whether that be blowing cold air through the premises or to just have some sort of air movement. There are different types of fans, which can be put in an industrial factory such as a mounted fan or a freestanding fan. Obviously to do a large area you need a large fan so having it mounted can be a benefit whilst having it freestanding can also be a benefit because it can be moved if need be. There are also different noise levels of these fans but most fans these days are relatively quiet especially in an area such as a factory.

A radial Blower fan is used in so many different ways and usually run by using electricity although a radial Blower fan can also run off a generator. Most households have a radial Blower fan, there is generally some sort of fan found in most houses. A radial Blower fan can be just your normal portable fan or a ceiling fan is normal is most humid areas. When you do have a ceiling fan it’s important to note that most of them must be put in by an experienced electrician otherwise you could have some serious problems with them. They are certainly a lot more economical than running an air conditioner, which is why they are so popular in humid areas where having some air flow cools down the place. Radial Blower fans are also found in most air conditioning units now, they are used to blow cooled air out of the unit and into the room.

Automobiles also have radial Blower fans placed in them to keep them from overheating, this is probably the most popular use for radial fans in this day and age. They’re placed under the hood of the car to keep the motor cool and stop it from overheating. Another use for radial Blower fans is also the home computer, obviously these are a lot smaller than most radial Blower fans but they get the job done, by stopping the computer from overheating also.

Oleg Cthetchel
Canadian air systems designer
Northern Industrial Co.

Industrial Radial Blower Fan

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