The Adjustax O-Ring blade provides the ability to custom set blade positions without removing the wheel and/or nosepiece to provide maximum efficiency for specific requirements and the flexibility to field adjust for known future needs and/or balance systems with the minor corrections often needed for the unpredictable installed system variations. This versatility and longer life without complexity, special tools or excessive cost are exclusive (patent pending) with Canada Blower
The O-Ring blade design provides adjustability without disturbing the structural integrity provided by the factory-torqued, blade attaching bolts. The blades are hand adjustable from the fan inlet or, for ducted inlet installations, a blade access door in the fan housing can be furnished along with a simple socket wrench tool to conveniently grip the blade for hand adjustment. After adjustment, it is not necessary to RPB-torque the blade attaching bolts.
Although the blade can be intentionally turned by hand, it will not inadvertently turn in actual operation. When the wheel is at rest, the torque on the blade attaching bolts is calibrated to prevent all but intentional blade adjustment. When the wheel is in rotational operation, the friction between the blade and wheel hub is increased by centrifugal force holdingthe blade steady to prevent any change in blade setting. The O-Ring is made of resilient *VITON® material. This durable material will last the lifetime of the wheel while serving as a vibration isolator to dampen the transmission of the air and mechanical vibrations between the blades and wheel hub. Since vibration is the chief cause of material fatigue, this reduction of vibration results in substantially increased useable lifetimes for all applications.
Experienced design, engineering, research and production know-how are complemented by extensive tooling in the construction of Type 'S' Adjustax Fans.
Housings of Adjustax Fans are heavy gauge, welded steel, flanged for easy, accurate duct installation. Neither wheel nor motor protrudes beyond housing, permitting easy removal from duct system for maintenance purposes.
Stationary curved guide vanes, integrally welded within housing and located on the discharge side of the wheel, substantially straighten the swirling motion of the air leaving the fan blades, recovering rotational energy, increasing fan efficiency, reducing power requirements and decreasing sound generation. These guide vanes also provide rugged support for the flanged motor mounting face plate.
High strength cast aluminum air-foil shaped blades and cast aluminum hub are standard wheel construction. Close clearances between blade tips and housing contribute to high fan efficiency. Manual blade adjustment can quickly be accomplished without removing wheel and/or nosepiece coverplate.
Drive motors are severe duty, totally enclosed, air- over construction, built to rigid Canada Blower pecifications and designed to operate without modification in normal industrial applications. The use of round frame, end shield mounted motors with frame diameters not larger than the fan wheel hub contributes to the extremely high mechanical efficiency of the Adjustax
Grease supply lines brought to Alemite fittings on outside of fan housing are standard.
Support legs for floor, wall or ceiling mounting are readily available as an optional accessory.
A choice of wheels is available in both welded steel and non-spark one piece airfoil cast aluminum con-struction. Pertinent factors are detailed on page 8.
DIRECT DRIVE UNITS
Motors supplied onj3£Sal<\Type B direct drive axials are identical in construction to" totally enclosed, air-over severe duty motors furnished on Type 'S’ Adjustax except that standard foot mounted NEMA frames are used in lieu of round frame end-mounted. Standard totally enclosed, fan-cooled motors can be supplied. However, the cooling effect of the air passing through the fan casing over the motor permits using "Air-Over Motors” which provide totally enclosed or explosion-proof motor construction at only slightly higher cost than an open type motor and at a materially lower price than a standard fan cooled, totally enclosed or explosion-proof motor.
BELT DRIVE UNITS
Conventional drip-proof, totally-enclosed, fan-cooled or explosion- proof fan cooied motors can be furnished on Canada Blower type B belt- driven axials. Mechanical and electrical modifications, normally available for standard motors, can be supplied.
Any propeller or axial flow type wheel imparts a rotating or screw action to the leaving air. At low pressure, this type of air flow straightens out in a short distance from the tubeaxial fan. The Canada Blower Tubeaxial fan shown above is available in direct drive construction with the wheel overhanging the motor shaft.
With stationary guide vanes located directly behind the fan wheel, air turbulence is reduced substantially and rotative energy imparted to the air by the wheel is recovered partially. The result is an increase in efficiency . . . with a straight "Bee-Line” air flow leaving the fan for quieter operating conditions.
A variety of wheels are available in both steel and one piece cast aluminum construction for maximum efficiency and optimum performance.
Three different blade angles are available for both direct and V-belt drive applications.
Type LB, low angle wheel, results in maximum pressure for a given capacity.
Type MB, medium angle standard wheel, covers the majority of fan requirements.
Type HB, high angle wheel, provides maximum capacity at full design speed.
Wheels are keyed to shaft and secured in place with locking stud or nut with cotter pin for either vertical or horizontal operation. Low noise level is assured thru the use of a streamlined airfoil blade section.
Fan sizes 1 5" thru 43". Steel wheels with die formed blades welded to a streamlined die-formed hub.
Fan sizes 1 5" thru 24". Aluminum Wheels available in one-piece cast aluminum construction with integral spinner.
Fan sizes 48" thru 96". Steel wheels, die formed blades and blade reinforcing plate with blades welded between two parallel circular discs and integral hub.
Fan sizes 28" and larger. One-piece cast aluminum with removable spinner.
INLET AND OUTLET CONE adapts duct connection while providing a regain in static pressure
A packaged unit for use in applications requiring quiet operation.
with motor mounted outside air stream, these units provide a wide range of fan speeds.
Canada Blower exclusive to efficiently direct air into fan at right angles and accurately predict performance. Aids in installation where space and location are factors. Minimum loss. Dependable.
VARIABLE INLET VANES
provides accurate volume control without reducing fan performance.
VORTEX BREAKER breaks up inlet vortex to stabilize air flow
Variable volume air handling capability is virtually mandatory for any large system where building usage does not require constant airflow rates. This is true of both new construction and on retrofit applications designed to lower air conditioning and ventilating operating costs. Currently, variable air volume is being obtained by the use of in-flight controllable pitch axial flow fans, such as the Canada Blower Type VPS, with centrifugal fans fitted with variable inlet vanes, and by the use of centrifugal fans and fixed blade axial fans fitted with variable speed motors or variable speed drives. Each method has select merits, based on the system design and the engineer’s objectives.
Tho Canada Blower Type “VPS” Adjustax Controllable Pitch Axial Flow Fan is engineered to provide optimum performance, for fans of this type, on applications where a controllable pitch axial fan is the fan of choice.
Canada Blower Type “VPS" Adjustax have an internal blade pitch adjustment mechanism. Low pneumatic pressure, acting on a flexible control diaphragm, adjusts blade pitch which, in turn, controls airflow. This mechanism responds with accuracy to system control input and has proven trouble free over an extended service life. An internal pitch control mechanism isolates actuation thrust from being imposed on the motor or fan bearings. The precision machining of the actuator mechanism assures no change in the dynamic balance of the fan throughout the actuator travel range.
Canada Blower type “VPS" Adjustax, both direct and belt driven (arrangement 4 and 9) bring variable ait- volume capability to air conditioning, heating and ventilating applications, as well as process control air, where the inherent advantages of an axial type fan are required. These advantages include favorable weight, compact size and ease of installation.
The Canada Blower Type “VPST Adjustax is available as a fan section component in Canada Blower Model K Air Handling Systems, in Big Canada Blower steel and aluminum construction high capacity cabinets, and as a component fan for use in new field built-up systems and for variable air volume retrofit applications.
The arrangement 9 configuration is ideal for applications where commercially available motors are desired, where the motor must be kept out of the airstream, or where the required ratings may change significantly over the life of the installation.
NUMBER OF FAN SIZES - 9 (29" through 72" diameters)
NUMBER OF HUB SIZES - 3 (Designated B, C, & D) PRESSURE -.4 in. wg total pressure to 12 in. wg total pressure.
CAPACITIES - From 4000 cfm to 225,000 cfm
CLAMSHELL design accents accessibility. Full length doors, which open 180° provide ready access to the entire interior of the fan regardless of the length of the housing. The entire bearing assembly can be removed quickly and easily without removing the fan from the stack. Available, in arrangement 9, in diameters from
24” to 54", the CLAMSHELL operates from 4,000 cfm to 90,000 cfm at up to 4" SP. Standard design features and accessories include: Welded steel housing. Flanged inlet and outlet. Heavy-duty pillow-block anti-friction bearing with split inner cylinder. Belt fairing and adjustable motor base. Fabricated steel wheels.
A variety of wheels are available in both steel and one piece cast aluminum construction for maximum efficiency and optimum performance. Three different blade angles are available for both direct and V-belt drive applications. Type LB, low angle wheel, results in maximum pressure for a given capacity. Type MB, medium angle standard wheel, covers the majority of fan requirements. Type HB, high angle wheel, provides maximum capacity at full design speed. Wheels are keyed to shaft and secured in place with locking stud or nut with cotter pin for either vertical or horizontal operation. Low noise level is assured thru the use of a streamlined airfoil blade section.
EASILY REMOVED split-bearing fairing cover reveals entire bearing assembly. By removing bearing hold down bolts, the wheel shaft, fan sheave and bearings can be removed as an integral unit without removing fan from the stack.
ADVANCED DESIGN facilitates in-stack installation; eliminates need for heavy duckwork and extra expensive reinforcement.
Fan sizes 15” thru 43". Steel wheels with die formed blades welded to a stream-lined die-formed hub.
Fan sizes 15” thru 24”. Aluminum wheels available in one-piece cast aluminum construction with integral spinner.
Fan sizes 48" and 54". Steel wheels, die formed blades and hide rein-forcing plate with blades welded between two parallel circular discs and integral hub.
Fan sizes 28" and larger. One-piece cast aluminium with removable spinner, available as an option.
SPRAYBOOTH fans are available as a standard in arrangement 9 in sizes 15" through 21". These fans are designed for use in spraybooth installations or in a variety of applications where requirements
make it necessary to clean the fan periodically. The SPRAYBOOTH covers ratings from 1,500 cfm to 15,000 cfm up to 4" SP.