Phone: 1-866-A BLOWER
Fax: 1-866-BEST FAN
Blower Co. develops various types and sizes of gas-tight and zero
leakage fans and blowers for containment of hazardous organic and
inorganic compounds in
industrial process plants and other critical applications. Special
and shaft sealing devices are available for blower service requiring
or minimal gas leakage into and out of casing.
Northen Industrial 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
single and double carbon ring seals; hermetically sealed blowers;
and ferrofluidic seals; and packed stuffing boxes with barrier liquids
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
* Pollution Control
* Pulp and Paper Industry
* Printing and Converting
* Chemical Plants
* Power Generation
* Research and Development
* Food Processing
* Paint and Ink Industries
Some special materials and alloys 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
These materials are typical for industrial applications requiring high
alloys and super alloys too.
As an intermediate step between standrard fan design and air-tight
design, Northen Industrial 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
1) Heavy gauge housing construction with solid housing drive side,
Neoprene Gasketing, and Viton, or Buna-N Rubber lip type shaft seal.
2) Full face sheet gasketing, Red Silicone or White Nitrile.
3) Contiunuosly welded fan housings;
4) Gas-purged mechanical shaft seals in lieu of lip seals - for greater
sealing capability at the shaft hole opening.
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
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).
Northern Industrial 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. Northen Industrial also does existing fans and blowers
repairs, re-build, as well as dynamical wheels balancing.