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Here's the recent articles submitted by Oleg Tchetchel

Articles By Oleg Tchetchel

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Airfloil Fans By Northern Fan Co.   By: Oleg Tchetchel
Northern Fan Airfoil Air-Kits have the following characteristics: • Aerodynamic airfoil wheels feature hollow blades with weep holes to prevent moisture retention • Standard and RA design for lower pressures • Inlet Volume Controls are ideal for variable volume systems • Shafts and bearings also available(read entire article)
View : 85 Times
Category : Business

Blowers Performance Curve   By: Oleg Tchetchel
While multi-rating tables are convenient, fan 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 : 59 Times
Category : Others

Chemical Fans   By: Oleg Tchetchel
Northern Fans meet the challenge of moving gases continually, reliably, efficiently and safely. They are built to API, or equivalent industry standards and their performance has been proven over many years of operation; and the blowers can meet unusual requirements that include dual drive systems with automatic drive engagement / disengagement and special materials of construction.(read entire article)
View : 60 Times
Category : General

Commercial Explosion Proof Fan    Submitted in different name as: Oleg Cthetchel
The Air Movement and Control Association's (AMCA) Standard 99-0401, “Classification for Spark Resistant Construction.” has the following characteristics: 1) It identifies who is responsible for what. 2) It allows for three different levels of construction: Type A, B, and C. 3) It is general in nature to allow different fan manufacturers to comply using alternative methods. 4) It provides disclaimers and warnings to users concerning residual risks. 5) It does not require qualification testing.(read entire article)
View : 59 Times
Category : Others

Energy Recovery Ventilators Fans   By: Oleg Tchetchel
Combining exhaust air and outdoor air aventilation functions into a single unit help drive an important practice in good HVAC design-building ventilation balance. In layman's terms: What goes in must come out. Traditionally, the outdoor air needs and the exhaust air needs were calculated in separate thought processes. The designer would specify the minimum outdoor air and exhaust air volumes required by code, but would stop short of comparing the totals to check the ventilation balance.(read entire article)
View : 46 Times
Category : Business

Fan And Industrial Blower   By: Oleg Tchetchel
Axial flow fans or industrial axial fans move an air stream along the axis of the fan. The way these fans work is similar to the propeller on an airplane: the fan blades generate an aerodynamic lift that pressurizes the air. Axial Northern Fans use a propeller to draw the air into the fan then discharge it in the same axial direction. Typical types of industrial axial fans include: * Tube axial fans (also called duct fans), * Panel fans (also called wall fans), * Personnel coolers, * Roof Ventilators, * Air circulators, * Vaneaxial fans(read entire article)
View : 62 Times
Category : Service

Fan Blower Vibration    Submitted in different name as: Oleg Cthetchel
As a result of the development of the 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 : 142 Times
Category : Education

Frp Ventilator Blower Fan   By: Oleg Tchetchel
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 : 66 Times
Category : General

Heavy Duty Fan Blower   By: Oleg Tchetchel
Radial blade fan designs have high pressure characteristics and are the least efficient of all centrifugal type wheels. Northen Fan radial fan blades are perpendicular to the direction of the wheel's rotation, like a paddle wheel. They are used primarily for simple industrial applications, Material-handling and other standard industrial uses. The wheel is typically heavy duty construction and simple to repair in the field.(read entire article)
View : 52 Times
Category : General

High Temperature Exhaust Fan   By: Oleg Tchetchel
Generally speaking, emergency smoke evacuation fans may never be used, but they must be installed and be capable of exhausting high temperature air and smoke in the event of a fire. In contrast, high temperature process ventilation requires continuous duty exhaust of high temperature air, fumes or particulate. Both application types are uniquely different requiring special construction and system design considerations. In this article, we will examine both types of exhaust applications, looking first at the emergency smoke exhaust category. Since emergency smoke exhaust deals with lifesafety issues, there are governing bodies in place that identify and regulate specific design and performance standards. The administration and organization of the various governing bodies is subject to modification based on the needs of the industry. Currently, four such agencies are Industrial Risk Insurers (IRI), Southern Building Code Congress International, Inc (SBCCI), the National Fire Protection Association (NFPA), and Underwriters Laboratories, Inc. (UL). IRI insures properties all over the world based on an informational manual, which details the construction requirements that belt drive emergency heat and smoke exhausters must meet in order to be covered by IRI.(read entire article)
View : 85 Times
Category : General

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