|The fan housing shall be constructed of stainless steel. The internal structural support and external mounting
material shall be 14 GA G90 galvanized steel minimum.
|The base shall be constructed of galvanized steel for improved rigidity. Bolt patterns shall be provided in
the base to allow connection to a pollution control unit.
|The fan wheel shall be centrifugal backward inclined and non-overloading. Wheels shall be balanced in two planes and
done in accordance with AMCA standard 204-96, Balance Quality and Vibration Levels for Fans. The wheel blades shall be
aerodynamically designed to minimize turbulence, increase efficiency and reduce noise. The wheel blades shall be welded to
the wheel inlet cone. In the event that balancing weights are required they shall be riveted to the blades or wheel. The wheel
inlet shall overlap the fan inlet for maximum performance and efficiency. The wheel shall be firmly attached to the motor shaft
with two set screws.
|Motor & Motor Compartment
|Motors shall be heavy duty ball bearing type, mounted on an adjustable base and furnished at the specified voltage,
phase and enclosure. Motor mounting plate shall be constructed of heavy gauge steel and isolated from the fan structure with
vibration isolators. The motor shall be Totally Enclosed and Fan Cooled and have high temp class F insulation. Motors shall be
washdown duty. The motor compartment shall be of a two-piece construction quick release clips to provide quick and easy access to
the motor compartment.
|Shaft & Bearings
|Shafts shall be precision ground and polished. Heavy duty, pre-lubricated bearings shall be selected for a minimum (L50) life in
excess of 200,000 hours of operation at maximum cataloged operating speed. They shall be designed for and individually tested specifically
for use in air handling applications.
|Belts & Drives
|Belts shall be oil and heat resistant, non-static type. Drives shall be cast type, precision machined and keyed and secured attached to
the fan and motor shafts. Drives shall be sized for a minimum of 150% of the installed motor horsepower. Fan operating speed shall be
factory set using adjustable pitch motor pulleys.
|Safety Disconnect Switch
|A safety disconnect switch shall be standard on all units. Switches shall be installed in a NEMA3R enclosure and mounted to
exterior of the fan for easy access.
| Product: Fan shall be model KB as manufactured by