Here's the recent articles submitted by oleg tchetchel
Articles By oleg tchetchel
Heavy Duty Blowers
By: oleg tchetchel
The NIS-CO Fan HPPB line is used by industry to meet high pressure requirements and medium to high volume. Capacities are available up to 100,000 cfm and pressure to 4 1/2 PSI Equivalent Static Pressure (SPE). Applications include: pneumatic conveying, air compression, furnace blowers, gas boosters, chemical processing, cooling applications, drying applications, gas exhausting and cryogenics.(read
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View : 363 Times
Category : Service
High Temperature Ventilator And Fans
By: oleg tchetchel
A common variation to the standard fan design is the addition of insulation. The bearing mounting plate, bearing cover and belt tube are the most likely components to be insulated for a high temperature application. NIS-CO Fan automatically includes insulation for these components on all fans specified with either HT Option III or HT Option IV.(read
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View : 323 Times
Category : General
High Temperature Fans Blowers
By: oleg tchetchel
When fans are exposed to elevated temperatures, many aspects of the fan design must be reviewed to make sure the fan will withstand the extreme temperatures and that the fan is appropriately designed for the application. The fan engineer must understand the limitations of materials and various failure mechanisms, such as high stress, stress to rupture, and creep. Sometimes, it is necessary to consider high cycle fatigue, low cycle fatigue in cyclical operation with speed changes, and numerous start-stop cycles. If rapid temperature changes are encountered, transient analysis may be required due to thermal stresses. Depending on the exposed temperature levels, the following are to be considered:
• Materials of construction for the wheel, shaft, and hub
• Wheel to hub attachment
• Materials of construction for the housing including insulation
• Bearings and lubrication
• Shaft seals
• Shaft cooling (air-cooled, water-cooled, etc.)(read
entire article)
View : 523 Times
Category : General
High Temperature Exhaust Ventilators
By: oleg tchetchel
SBCCI is a not-for-profit organization of government officials from the United States and several foreign governments, which serves a strong leadership role in the delivery of model building codes. The purpose of the NFPA can be summarized into three main categories. First, NFPA promotes the science and improves the methods of fire protection and prevention, electrical safety, and other related safety goals. Secondly, it obtains and circulates information on these subjects. And thirdly, it secures the cooperation of its members and the public in establishing proper safeguards against loss of life and property. The fourth organization is Underwriters Laboratories, Inc.. UL is a non-profit, independent organization that maintains and operates laboratories for examination and testing of devices, systems and materials to determine their relation to life, casualty hazards and crime prevention. UL has three safety standards that apply to emergency smoke exhaust products. UL705 is concerned with the mechanical and electrical construction to insure safe operation. All electrical components (motor, wiring, switches, enclosures, etc.) must be ULlisted. UL793 is concerned with the lifting mechanism for the butterfly dampers and the fusible link. In order for a product to be listed in the UL Directory under ÒPower Ventilators for Smoke Control Systems, it must meet the requirements of both UL705 and UL793. Additionally, UL must witness a full-scale test of a fan operating for the required time at the specified elevated and temperature.(read
entire article)
View : 326 Times
Category : Others
Industrial Air Gas Scrubber
By: oleg tchetchel
To assure the safety of employees and to achieve the utmost plant efficiency, industrial facilities must implement measures to contain the solid or liquid aerosols and / or vapors that occur as a result of many manufacturing operations. Buffalo Fan provides wet scrubbers for the effective collection of wet and dry fumes and particulate. SysTech professionals have the experience to assist in selecting the wet scrubber to best suit the applications and budget.(read
entire article)
View : 350 Times
Category : Shopping/Product Reviews
Frp Blower Fan Ventilator
By: oleg tchetchel
Fumes are the dry vapors evolved from acids, solvents, etc. An example is the dry acid vapor scavenged from a process using acid. As a generalization, fumes are not as corrosive as aerosols. Aerosols are suspensions of liquids or solids in a gas stream. For the purpose of this discussion, aerosols are considered as quite dilutebeing wet. Water as fog is an example of an aerosol. Another example is the mist of acid present in air scavenged from a process where acid is being used as a spray wash. As a generalization for the purpose of estimating corrosiveness, aerosols in fan driven systems can be considered as being dilute concentrations of the chemicals composing the aerosols. An example of the distinction between fumes and aerosols is a system where sulfuric acid fumes are collected by hoods and scrubbed. The dry fumes entering the scrubber could be quite concentrated but have a relatively mild corrosive effect on the hood and duct material. On the other hand, the wet gas down streamfrom the scrubber could be quite dilute but more corrosive because of the scrubber's converting the fumes to an aerosol.(read
entire article)
View : 323 Times
Category : Business
Fans For Chemical Process
By: oleg tchetchel
Petrochemicals industry provides the widest range of challenges for rotating equipment. NIS-CO Fan (New York) fans and blowers operate in conditions encompassing extreme pressure and temperature, and handle a wide range of gases containing aggressive and toxic components. Demanding specifications and strict safety requirements must be met and above all is the need for dependable operation over long periods.(read
entire article)
View : 293 Times
Category : Shopping/Product Reviews
Fiberglass Blower Ventilators
By: oleg tchetchel
When fiberglass is the selected material for an air-handling system, it is logical that the fan also be made of FRP. For example, the acids used in the pickling of stainless steel are necessarily those that attack stainless steel. In such a system, the acid resistant tanks, fume control hoods, ducts, air and gas scubbers, and fans are often made of FRP because FRP resists acid corrosion and costs less than metal alloys having comparable resistance.(read
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View : 306 Times
Category : Technology, Gadget and Science
Fan Blower Vibration
Submitted as: Oleg Tchechel
There is am issue in the fan industry that is causing significant changes in fan design and in the manner in which fans are marketed. As a result of the maturing vibration measuring instrumentation market, computer software and maintenance training programs have been adapted which equate “low vibration” with long life, igher quality, and lower maintenance costs. The fan manufacturers used to be the “vibration experts” and set the tolerance for acceptable levels of vibration.(read
entire article)
View : 443 Times
Category : General
Fan Performance Chart
By: oleg tchetchel
The fan chart is a table presentation of fan performance. It is one of the most useful tools available during the fan selection process. While multi-rating tables are convenient (see page 12), performance curves offer additional information such as - how much reserve pressure head exists between the design pressure and the peak static pressure, the maximum power the fan might draw, and the efficiency of operation.(read
entire article)
View : 407 Times
Category : Technology, Gadget and Science
