Description Benefits Primary Applications - Howden

Description Benefits
The unique design of our Axivane ® Series 1000/2000
fans help provide low installation and maintenance
costs, space savings, system efficiency and high
reliability.
The design is simple and straightforward. It consists
of a rotor assembly which includes a nosepiece, hub
and blades. This rotor assembly is directly connected
to the motor, giving one axis of alignment for the
energy-building rotating components.
These in turn, are securely
mounted into a steel plate
housing which includes a
cambered air-diffusing
vane section to complete
the basic Axivane ® fan.
Primary Applications
The Axivane ® fans provide space and
energy savings. Their low installation costs
and high reliability make them ideal for uses
such as:
• navy or maritime applications,
• hospitals,
• stadium domes,
• microelectronic chip production,
• general building ventilation,
• and OEM applications.AGE)
The Axivane ® fan provides three cost-saving
methods of controlling air volume:
ADJUSTABLE PITCH DESIGN— The blade pitch
of the adjustable pitch design is easily changed
with the fan at rest. Pitch setting is accomplished
by loosening a stop-nut on each blade and rotating
the blade to a selected index setting number
stamped on the blade boss. The range of blade
adjustment is infinitely variable from low blade
angle/low volume to high blade angle/high volume.
CONTROLLABLE PITCH DESIGN— Blade pitch
can be adjusted while the fan is operating to compensate
for varying volume and/or pressure system
requirements. Adjustment can be manual or with
electric or pneumatic operators. It can be controlled
by temperature, gas analysis, humidity, volume or
pressure sensors. The blade pitch is changed by use
of an adjusting mechanism which is connected to a
lever bar and external control actuator. In response
to a control signal all the blade angles change instantaneously
while the fan is operating. Air volume flow
can be changed in seconds.
SIMULTANEOUS PITCH ADJUSTMENT
(SPA) DESIGN— With this fan, the blade pitch
control can be changed in minutes with one simple
operation. Release the blade pitch control nut-lock,
change the angle of all blades with a twist of the
wrist, then reset the nut-lock. It provides infinite air
volume control in a single, simple fan installation.
Also, the SPA fan is practically maintenance-free.

Axial Ventilating Fans
Advantages
QUIET OPERATION— The Axivane ® Series 1000/2000 is designed to effectively
control fan noise with less attentuation than comparable centrifugal fans providing
lower system cost and reduced space requirements.
Howden Buffalo uses the most advanced data on duct silencers and system
attenuators to provide fan systems with the lower noise levels required for
occupied spaces.
Additionally, the Axivane fans are built to minimize vibration. Through precision balancing of the rotor before
assembly, and final balance operating of the fan/motor combination prior to shipment, Howden Buffalo holds
vibration to levels generally below industry standards, which is normally less than 1 mil double amplitude.
LOW INSTALLATION COST— The simple straightforward design of the
Series 1000/2000 fans allows for fast, easy installation. Lightweight, compared to
centrifugals, Howden Buffalo fans can be mounted on the floor, wall or ceiling, as
well as in vertical, horizontal or inclined positions. Lighter weight fans in this series
help reduce handling, rigging and support costs. Heavy concrete foundations are
usually unnecessary and no assembly is required. Howden Buffalo fans are
shipped in one piece, preadjusted and assembled, ready for installation.
ENERGY SAVINGS— Energy conservation is now more important than ever before.
Howden Buffalo’s Controllable Pitch fan answers the challenge by taking advantage of
the inherent power savings in variable air volume (VAV) partial load operations better
than any other control method. The controllable pitch fan automatically supplies your
VAV system with just the right amount of air.
Here’s how it works:
In response to a control signal, the blade angle changes much like the pitch of
an airplane propeller during flight, air volume flow can be adjusted to meet changing system requirements in
seconds. Also, the inherent in-line air flow of the axial design eliminates the need for power-robbing turns and
duct offsets. In short, Axivane fans use less power and reduce operating costs. They are, in the truest sense, an
energy-efficient system.
RELIABILITY— An internal, direct-connected, heavy-duty motor in the air stream
eliminates downtime due to V-belt drive maintenance requirements. Sturdy fan
construction, heavy-gauge casing and flanges, rigid quality control standards and
advanced testing procedures provide long fan life.

Series 1000/2000
SERIES 1000/2000 (ARR. 4 OR ARR. 9)
Adjustable pitch blades
19 standard rotor diameters – 18” thru 84”
5 hub sizes – 14” to 30”
500 thru 250,000 CFM
Static pressures to 22” WG
SPA fans allow single point manual blade adjustment
SERIES 1000/2000 CONTROLLABLE PITCH (ARR. 4 OR ARR. 9)
Adjust pitch of blades while fan is in motion
19 standard rotor diameters – 18” thru 84”
4 hub sizes – 17” to 30”
500 thru 250,000 CFM
Static pressures to 22” WG
All Arrangement 4 Axivane ® fans can be furnished in two-stage construction for high pressure applications.
Series 1000/2000 Compax (Arr. 4)
40% shorter than conventional vaneaxial fans with outlet cones
Space requirement for equipment rooms significantly reduced
Combines the function of the fan and outlet cone
18” to 72” diameters
1,000 to 200,000 CFM
Static pressures up to 14” WG
Standard motors up to 200 hp
Available in adjustable pitch and controllable pitch
Custom Fans
Howden Buffalo manufactures an infinite number of axial fans of all sizes (50 to
3,000,000 CFM) for specialized applications. For example, tunnel and mine ventilation,
commercial marine, MIL specs, high pressure industrial applications, reverse flow,
microelectronic chip production, etc. All materials of construction available.
Axial Ventilating Fans

Axial Ventilating Fans
Specifications
• Designed and constructed to the most exacting quality standards of the industry
• Heavy-duty construction, precision castings and rigid assembly tolerances ensure repeatable performance,
low maintenance and long service life
• Adjustable pitch rotor assembly, pitch setting changes fan performance. Accomplished by loosening
self-locking nut on blade and rotate blade to desired performance index
• Structural tie between the motor mounting plate and the inner fairing-vane assembly produces a rigid
mounting platform needed to establish and control a single-axis of rotation concentric with the fan housing
• Motor leads encased in an air-tight metal conduit pipe in direct drive fan units. External grease leads
terminate near the external conduit box
• Bulkhead-type 3/4” thick motor mounting plate for C-face motor mounting
• Standard foot-mounted motors available on belt-driven units
• C-face mounted TEAO and ODP motors available on direct-drive units
• Internal and external actuator options
• CP mechanism allows in-flight control of blade pitch
• Aerodynamic ratings per AMCA Std. 210-85
• Sound ratings per AMCA Std. 300
ISO 9001-2000 registered
This 9th Edition of the Fan
Engineering Guide is the
definitive reference guide to
industrial or air conditioning
fan applications. Valued at $99.
Brief History
Howden Buffalo’s extensive knowledge of fan and
blower applications, combined with our more than 100
years of experience, makes us a leading manufacturer
of air movement equipment.We provide upgrades,
repairs, parts and service for boiler, hood and
ventilating fans originally manufactured by 25 different
companies. Our strong history, along with these
acquisitions, positions us as a company dedicated to
meeting the needs and demands of the fan market.
800.327.8885
2029 W. DeKalb Street x Camden, SC 29020
www.howdenbuffalo.com
Emergency Parts and Service 800.458.FANS