When comparing forced draft versus induced draft industrial fans, the primary difference is boiled down to push versus pull. Forced-draft fans focus the pressure and volume at the outlet of the fan to push air through a system, creating positive air pressure. Industrial induced draft fans operate by focusing the pressure and volume at the inlet of the fan to pull air through a system.
It’s not always either-or. Forced draft and induced draft fans often work in concert to maintain efficient and steady air pressure and control the flow using VFDs, dampers, & other accessories.
Application Considerations for Forced Draft Versus Industrial Draft Fans
Your application will determine the ultimate performance of your industrial fan whether its job is to push or pull the air through the system.
The Push: Forced draft fans accommodate higher process inlet temperatures, often working to push ambient air through burners to preheat air for boiler system efficiency. They can require less structural support and may offer a longer mechanical life than many induced draft fans because the cleaner ambient air is not as hard on the fan as the air often pulled through using induced draft.
The Pull: Induced draft fans often operate in harsh conditions handling process air that may include high temperatures, acidic airstreams, and other extreme exhaust gases. They can operate at higher efficiencies relative to forced draft fans, but the extreme conditions can require special attention to imbalance, excessive vibration, temperature, maintenance, and operating costs.
Industrial Fan Designs Support Push or Pull
While materials and accessories may differ, the same basic fan designs support both forced draft and induced draft fans. Those designs include:
More Information on Forced Draft Versus Induced Draft Industrial Fans
As part of our continuous improvement efforts on our website, we have initiated updates to our application pages, starting with Forced Draft and Induced Draft applications. Watch for more soon.
In the food and beverage industry, contamination is always a high priority concern. Small mistakes in handling, preparation, and even in the cleaning of the environment where food comes into contact with surfaces can cause disastrous results that can potentially affect hundreds of thousands of people.
Often overlooked is the threat from another source of food contact: air.
Air is an Ingredient in Food
Outdoor air can naturally carry anywhere from 200 to 1500 bacteria per cubic meter. The natural defense...
At College of the Sequoias (COS), a California community college in Visalia, CA, indoor air quality is a high priority. “We have not had IAQ complaints, so when we discovered naturally occurring mold growth in the air conditioning coils, we decided to treat it proactively — before mold-related allergens circulated from the HVAC systems into the occupied space,” stated Eric Mittlestead, dean of facilities and facilities planning at the 11,000-student college.Since COS does not have staff resources...
The CCES Blog often contains tips to reduce your energy usage and therefore greenhouse gas (GHG) emissions as cost effectively as possible. Here’s another such tip. Take a hard look at your mechanical equipment, mainly pumps. If they are more than a decade old, they may well be oversized for its function, reducing energy efficiency and raising its costs rise.
There are certainly exceptions to the rule, but until recently most engineers oversize their design of pumps by 10-20% “just in case”....
Most of the air regulations promulgated by U.S. EPA are developed and implemented to achieve compliance with the National Ambient Air Quality Standards (NAAQS). The NAAQS represent ambient air concentration levels that are established by U.S. EPA to ensure that the general public and sensitive subgroups of the general public are not adversely affected by air pollution. The various NAAQS arguably represent the "backbone" of the air quality regulatory system in the United States.
Over the past 35 years the...
A major fresh pack operation of peaches and nectarines needed a screening system to remove the labels and peach fuzz from their wash water before it was pumped from the pond for irrigation use. Flow to the pond is a steady flow of 50 gpm, rising to 600 gpm during periodic draining of the peach coolers and washing systems. The water is a combination of wash water, labels and fuzz from the fruit, which clogged the irrigation pump intake, left dried fuzz in the fields which is a skin irritant to the field staff.
Inte...
About this booklet
This booklet deals with environmental noise − for example, noise from industrial
sites, road and rail traffic, airports and fairgrounds. It does not cover related issues
such as building acoustics, building vibration or domestic noise. Neither
does it cover human response to vibration nor industrial uses of sound and vibration
measurements. Please contact your Brüel&Kjær representative to receive
further information regarding these issues.
While we have made every...
Up to now, the recovery of precious metals used as catalysts in chemical processes has involved the use of incineration. Now, however, a British-Swedish joint venture has developed a process which uses supercritical water oxidation instead, which provides many economic and environmental advantages.
Precious metals are used extensively in catalysts in a wide range of industrial chemical processes. Sometimes they are used in a homogeneous form, but more often fixed to a solid support for ease of handling. In many...
ABSTRACTMore cost effective alternate technologies are needed to meet the demands of existing and upcoming Federal air regulations. Bio-Reaction Industries, Inc. (BRI) has developed a patented, modular, high-rate, vapor-phase biofilter that has provided such a solution for a major oil company for the past four years. This compact system has adsorbed and digested high VOC surge concentrations (over 90,000 PPMV) from a glycol dehydrator in a high CO2, corrosive environment. System design changes, operation/maintenanc...
According to the Environmental Protection Agency (EPA) journal, the average American spends about ninety percent of their time indoors. This is why the chances are overwhelming that most of the air you breathe either has entered via your building`s ventilation system... or filtered in through doors, windows, or porous wall materials.
Along the way, the air might have picked up any number of things, such as bacteria or paint dust, which you could be inhaling right now.
If you are exposed to contaminated air,...
Many of the Environmental Protection Agency`s (EPA`s) methods used to monitor air, water and soil for environmental contaminants prescribe step-by-step details on how the chemical analysis must be conducted and prohibit any deviations or variations. The EPA has recognized that monitoring equipment and technology have improved tremendously over the last few years; that environmental media do not always act the same way for each analysis; and that the matrix may affect the analysis and results. The EPA has been...
Introduction
This report provides the findings to a study commissioned by DGXI of the European Commission and undertaken by ECOTEC Research & Consulting Ltd. The study has been commissioned to provide an analysis of current export activity by the EU eco-industry, the employment effects of this export activity, future export opportunities and to develop appropriate policy recommendations for promoting EU eco-industry exports and employment in the future.
Objectives
Specific objectives of the study are...
On 12th March 1997, the European Commission adopted a proposal from the Environment Commissioner Ritt Bjerregaard on a European Union strategy to combat acidification. The strategy will, by 2010, reduce significantly the extent of the areas in the European Union where the tolerance of sensitive ecosystems to acidity is exceeded. Main elements of the strategy include establishment of national emission ceilings for each acid rain pollutant; ratification of the UN protocol on further reductions of sulphur emissions;...
Three technologies that are most commonly used to treat nonhalogenated VOCs in air emissions/off-gases are carbon adsorption, catalytic oxidation, and thermal oxidation.
Carbon adsorption is a remediation technology in which pollutants are removed from air by physical adsorption onto the carbon grain. Carbon is `activated` for this purpose by processing the carbon to create porous particles with a large internal surface area (300 to 2,500 square meters per gram of carbon) that attracts and adsorbs organic...
In general, no single technology can remediate an entire site. Several treatment technologies are usually combined at a single site to form what is known as a treatment train. A system diagram of a common treatment train for halogenated VOCs is illustrated below. A ground water pumping system is used to pull contaminated water from the subsurface. The VOC contaminated water is pumped to a liquid phase granulated activated carbon (GAC) adsorption system. The GAC system removes VOCs in the water and the effluent is...
It may be necessary to know other subsurface information to remediate inorganics in ground water, surface water, and leachate. Treatability studies are usually necessary to ensure that the contaminated ground water can be treated effectively at the design flow. A subsurface geologic characterization would be particularly important to characterize the effects of adsorption and other processes of attenuation. Ground water models are also often needed to predict flow characteristics, changes in contaminant mixes and...
STEP ONE: ASSESSMENT AND SURVEYThe first step of the Asbestos Management Program is to do an asbestos survey to assess the location, identify the type of asbestos, the condition of the asbestos and identify a maintenance record. This asbestos inventory or assessment is usually carried out by an independent consulting firm. This assessment or survey will include:
Identification and location of the Asbestos Containing Materials (ACM) Assessing the condition of asbestos and its accessibility. Preparing a long term...
Customer comments
No comments were found for Forced Draft Versus Induced Draft: The Push & Pull of Industrial Fans. Be the first to comment!