Here's the recent articles submitted by oleg tchetchel
Articles By oleg tchetchel
Explosion Proof Blower Ventilator
By: oleg tchetchel
Smoke exhaust ventilatorss are designed to remove smoke and heat from buildings in the event of a fire. These fans play a crucial role in increasing occupant safety and allowing rescue personnel to safely enter burning buildings. CB Blower offers a full line of smoke and heat fans capable of withstanding a minimum temperature of 500°F for four hours or 1,000°F for 15 minutes. Our inline smoke and heat fans are also available in a vertical roof mount configuration featuring a discharge cap with butterfly dampers and an optional fusible link designed to stay open in the event of a fire.(read
entire article)
View : 444 Times
Category : Education
Explosion Proof Centrifugal Fans
Submitted as: Oleg Chechel
Industries such as chemical, pharmaceutical, and various industrial processes have explosive environments that require the equipment to be specially constructed to minimize the risk of gas or dust ignition. Fans are one of the items of industrial equipment that have potential to ignite either gas or dust from either sparks caused by contact of the fan wheel and housing, or because of fan motors with high temperatures, inadequate gas/dust ingress protection, or inadequate construction for prevent spark or flame propagation in to the surrounding atmosphere.(read
entire article)
View : 442 Times
Category : Business
Cb Blower / Canada
Submitted as: Oleg Chechel
CB Blower supplies fans, blowers and pumps to a wide range of industries and applications. When prolonged service wears fan wheel the logical replacement is a new fan wheel built to the original design. A technical support and sales agent will get a replacement wheel, shaft, bearings, accessories, etc. in the shortest time. She, or he may also recommend changes to extend service life and performance of your machinery, including special materials of construction, explosion-proof and spark-resistant design, variety of coatings and accessories, intended to meet practically any application needs.(read
entire article)
View : 563 Times
Category : Service
Fan Performance
Submitted as: Oleg Chechel
Fan curves are sometimes referred to as "test curves". A typical test curve will often define the performance parameters for a specific design and size of fan, operating at a given speed, moving a gas of a given density.(read
entire article)
View : 495 Times
Category : Hardware/Software
Fan Blower Performance Curves
Submitted as: Oleg Chechel
Fan performance curves are actually composed of four separate curves:
• Static Pressure vs. Volume Curve: This plot is the one often referred to as the "fan curve" or "characteristic curve" because it defines all the possible pressure-volume combinations the fan is capable of producing given stated conditions (i.e. rpm and gas density). Note that this curve has two regions - one marked by dashed lines and the other by a solid line. Fans must be selected so that the design point is located on a solid portion of the curve, preferably in an area of high operating efficiency. Operation on the dashed portion of the curve should be avoided as it is a zone of potentially unstable performance. For this reason it is wise to allow some reserve between the peak static pressure and the design pressure to compensate for a higher resistance to flow than anticipated by the design calculation.
• Static Efficiency vs. Volume Curve: In most instances it is desirable to have a fan perform as close to its peak efficiency as possible. The static efficiency vs. volume curve illustrates the efficiency of fan performance at a glance.
• Power vs. Volume Curve: This plot illustrates the power draw of the fan for any point on the characteristic curve.
• System Curve: The system curve defines the volume flow rate versus pressure characteristics of the system in which a fan will be installed.(read
entire article)
View : 480 Times
Category : General
Fan / Blower Vibrations
Submitted as: Oleg Chechel
Forces that are not constant in amplitude or direction over time can cause solids to move repetitiously. We call this vibration. The similar motion imparted to the air is called sound. These phenomena are somewhat interchangeable since sound can cause vibration and vibration can cause sound. One difference is that sound is only dealt with when it is audible while vibration must be addressed even when it is outside the range of human perception. All fans must generate some vibration.(read
entire article)
View : 418 Times
Category : Business
Fiberglass Frp Blower Fans
Submitted as: Oleg Chechel
CB Blower FRP Pressure Blowers are fabricated of polyester resin based FRP , while wheels are made of vinyl ester resin FRP to allow for more strength. 316 stainless steel, or Hastelloy C-276 alloy wheel and shaft assemblies are available. FRP ORB self-cleaning wheel design and FRP Pressure Blower wheel design are used depending on application. Standard shafts are made of C-1040/1045 steel covered with FRP sleeve. 316 stainless steel shafts are optional. Inlet/outlet flange drilling is according to ANSI 125/150 bolt pattern, or Voluntary Product Standard PS15-69. Neoprene gasketing with Teflon Shaft Seal, or Viton seal element in FRP casing is provided where low leakage is desired.(read
entire article)
View : 444 Times
Category : General
Fiberglass Fan For Chemical Industry
Submitted as: Oleg Chechel
CB Blower fans can be supplied to be gas tight and made of special materials to resist corrosion. Fans and turbo blowers are supplied to provide air for carbon black plants and for sulphuric acid plants.(read
entire article)
View : 405 Times
Category : General
High Temperature Industrial Exhaust Ventilator
Submitted as: Oleg Chechel
NFPA SBCI 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,Ó 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 : 538 Times
Category : Others
High Temperature Industrial Fan
Submitted as: Oleg Chechel
For industrial fans applications, 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. 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.(read
entire article)
View : 424 Times
Category : Others
