Sealed Ventilators and Blowers by gjjur4356


									?Buffalo Fan Co. has a lot of experince with gas tight and zero leakage construction
on fans and blowers, including: multistage lip shaft seals; Buna-N, Viton and Teflon
seals; mechanical shaft seals; special fan housing gasketings; single and double
carbon ring seals; hermetically sealed blowers; magnetofluidic and ferrofluidic seals;
and packed stuffing boxes with barrier liquids and purgeable seals.

Buffalo Fan Co. now offers zero-leakage and gas-tight blowers and fans for
containment of hazardous inorganic and organic compounds in industrial
manufacturing plants and other critical applications. Special alloy construction and
shaft sealing devices are available for blower service requiring zero or minimal gas
leakage into and out of casing.

Specific code welding processes and special fan design features are used too - to
ensure complete gas tight integrity.

Zero leakage and gas tight fans and blowers could be used in the following industries:

* Printing and Converting
* Chemical Plants
* Pollution Control
* Pulp and Paper Industry
* Food Processing
* Paint and Ink Industries
* Power Generation
* Research and Development
* Petroleum

Some special alloys and materials frequently used in gas tight fans, especially for
service in hazardous, abrasive, corrosive and high temperature environments, include:

Corten, ASTM A36 Carbon Steel, Hastelloy, Inconel, Stainless Steels of different
kinds, Titanium, Monel, Aluminum, Teflon, Rubber LIning. These materials are
typical for industrial applications requiring high strength alloys and super alloys too.

As an intermediate step between standrard fan design and air-tight design, Canad
Blower offers a few stages of low leakage construction on fans and blowers - for
industrial cusomers calling to minimize leakage fans due to the presence of toxic or
corrosive gases in the airstream. As some system requirements are more stringent than
others, and since some of the necessary modifications can be rather expensive, a few
levels of Low Leakage Fan Construction are offered to choose from:

1) Contiunuosly welded fan housings;
2) Gas-purged mechanical shaft seals in lieu of lip seals - for greater sealing capability
at the shaft hole opening;
3) Heavy gauge housing construction with solid housing drive side, Neoprene
Gasketing, and Viton, or Buna-N Rubber lip type shaft seal;
4) Full face sheet gasketing, Red Silicone or White Nitrile.

In order to achieve a proper sealing, the mechanical shaft seal should be purged. The
recommended purge pressure is 2 to 5 PSI above the process gas pressure.

Lip seals are furnished with two seal elements, each with a stainless steel spring for
maintaining surface contact. The seal assembly is lubricated with" never-seeze".
Mechanical seals are double or triple carbon ring seals mounted in a carbon steel
housing. The seal housing is furnished with two purge ports.

To ensure proper fan sealing, Soap Bubble or Chalk / Kerosene tesing of the blower
assembly is performed. This ensures that continuous weld has completely sealed the
housing seams (liquid tight).

Buffalo Fan 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. Buffalo Fan Co. also does existing fans and
blowers repairs, re-build, as well as dynamical wheels balancing.

For additional information please refer to /.

Oleg Tchetchel
Designer of Ventilation Equipment
Buffalo Fan Co.

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