In Australian industry, centrifugal fans are commonly referred to as centrifugal blowers, blower fans, or industrial blowers, all referring to the same class of product. Fanquip’s centrifugal fan range covers the same product described by all these terms: a fan that uses a rotating impeller to move air radially outward, generating higher pressure than axial fans at the same volume. Where axial fans move large volumes of air at low pressure and suit open extraction applications, centrifugal fans suit ducted systems with significant resistance, material conveying, spray booth extraction, and any application where the fan must work against back-pressure to deliver airflow. This article maps the key industrial applications and helps buyers identify which of Fanquip’s three centrifugal variants suits their situation.
When centrifugal fans outperform axial fans
Axial fans are the default specification for most open extraction and ventilation applications. Centrifugal fans become the correct choice when the system imposes significant resistance on the fan. Ductwork, filters, process equipment, or material being conveyed all create static pressure that an axial fan cannot efficiently work against. Centrifugal fans maintain their airflow performance under high resistance conditions that would cause an axial fan to stall or deliver substantially reduced volume.
The practical test is straightforward. If the fan is pushing air through a duct run longer than a few metres, through filter media, or into equipment with internal resistance, such as a spray booth with filter banks, a grain dryer, or a cyclone separator, a centrifugal fan is likely the correct specification.
For a full mechanical comparison of the two fan types, see how axial and centrifugal fans compare mechanically, and for the operating principle in more detail, see how centrifugal fans work.
Spray booth and paint coating applications
Spray booths require a fan that can push air through filter banks, typically a primary filter capturing overspray and a secondary filter for fine particulate, and exhaust it through ductwork to the atmosphere. The filter media creates significant static pressure that an axial fan cannot efficiently overcome. A backward inclined centrifugal fan suits this application. Its self-limiting power characteristic prevents motor overload if filter loading increases over time, and its higher efficiency at elevated pressures reduces running costs compared with a forward curved model.
Paint and powder coating production lines use centrifugal fans for both exhaust of solvent vapour and supply of make-up air through filtration. The backward inclined variant’s clean air suitability makes it the standard choice for coating applications where the fan must not contaminate the airstream with lubricant carryover. This is a common requirement in manufacturing paint shops and in spray booth extraction at construction equipment depots, where painted plant and machinery pass through a coating line before dispatch.
See ventilation for paint and coating production facilities for further detail.
Grain handling and agricultural material conveying
Grain, seed, and cereal handling facilities use centrifugal fans as the motive force in pneumatic conveying systems, where grain is suspended in the airstream and conveyed through pipes from receival pits to storage bins. This application involves contact between the impeller and the conveyed material, which requires the materials handling centrifugal fan with a robust impeller designed to tolerate abrasive particulate contact. Forward curved and backward inclined fans are not suitable for this duty. Their impeller design is not intended for material-laden airstreams and would be damaged by abrasive particulates.
Grain dryers also use centrifugal fans to force heated air through grain beds at the pressures required to penetrate the grain depth. The high static pressure capability of centrifugal fans suits this application, where the grain column presents significant resistance to airflow.
See fans used in grain storage and handling and fans for agricultural grain drying for broader context on grain facility ventilation.
For general materials handling applications beyond grain, see material handling fans and blowers.
Ducted industrial ventilation systems
Long duct runs in underground mining operations, tunnels, and large industrial facilities can accumulate enough static pressure to make axial fans inefficient in that specific run. Centrifugal fans are the better choice for these higher-resistance sections, and are commonly specified as auxiliary or booster units alongside the axial fans that handle the primary bulk air movement in mine ventilation systems. The belt drive configuration allows the motor to be positioned outside the airstream, which is relevant in mining environments where the air may contain methane or other flammable gases.
See ducted ventilation in mining operations for the broader mining ventilation picture.
In manufacturing facilities with multiple extraction points connected to a central exhaust plenum, a forward curved or backward inclined centrifugal fan at the plenum handles the combined resistance of all branch ducts simultaneously. This centralised approach suits paint shops, wood machining facilities, and food processing plants where individual machine extraction feeds into a common duct system.
Chemical processing and fume exhaust
Chemical processing facilities exhaust corrosive gases and vapours that would degrade a standard axial fan’s casing and impeller. Centrifugal fans can be manufactured from corrosion-resistant materials, including stainless steel or fibreglass reinforced polymer, making them suitable for acids, alkalis, and solvent vapour exhaust in chemical and pharmaceutical manufacturing. The backward inclined centrifugal fan’s clean air design suits pharmaceutical grade exhaust where contamination of the airstream from the fan itself must be prevented.
Oil and gas processing plants use centrifugal fans for ventilation of enclosed processing modules, where the combination of high static pressure requirements, from long duct runs through the module structure, and the need for hazardous zone rated construction rules out standard axial fans.
See ventilation requirements in oil and gas processing facilities for related considerations.
Food processing and material handling
Food processing facilities use centrifugal fans for pneumatic conveying of flour, sugar, starch, and other food powders, applications where the materials handling centrifugal fan’s robust impeller suits particulate-laden airstreams. They also use backward inclined centrifugal fans for positive pressure supply of filtered air into sensitive production areas, where the fan must maintain pressure against filter resistance while keeping the food production area free from contamination.
The backward inclined centrifugal fan’s quiet operation is relevant in food processing environments where machinery noise is already high and additional fan noise must be minimised.
See ventilation design for food processing facilities for a fuller treatment of food facility ventilation.
Matching the Fanquip centrifugal fan variant to your application
Materials handling centrifugal fan. Specify this variant when the airstream contains particulate material, such as grain, wood chips, dust, aggregate, or food powders. The impeller is designed to tolerate abrasive contact. Do not specify the forward curved or backward inclined variants for material-laden airstreams.
Forward curved centrifugal fan. Specify this variant for general ventilation applications where low noise and moderate pressure are the priorities, including supply air systems, low-pressure exhaust through short duct runs, and general industrial supply applications. Forward curved fans generate higher volume at lower pressure than backward inclined and are the standard general ventilation centrifugal.
Backward inclined centrifugal fan. Specify this variant for clean air applications requiring higher pressure, including spray booth extraction, pharmaceutical exhaust, long duct runs, and any application where self-limiting power is important. The backward inclined is more energy efficient than forward curved at higher pressures and will not overload the motor as filter resistance increases.
All three variants are custom built to specification. Fanquip does not hold these as fixed stock items, so the correct configuration is confirmed through consultation rather than selected off a shelf.
Buying centrifugal fans in Australia
Fanquip designs and manufactures centrifugal fans in Australia for Australian industrial conditions. All three variants are custom built to the buyer’s specification, including fan diameter, motor power, shaft speed, casing material, and motor rating, rather than selected from a fixed catalogue. This means the correct fan for a specific application is specified through a consultation, not selected off a shelf.
Australian buyers benefit from local manufacturing lead times, local aftermarket support for impeller replacement and motor servicing, and the ability to specify fans that meet Australian electrical standards without importing and re-certifying overseas equipment.
Contact Fanquip’s team with your application requirements, including duct dimensions, static pressure estimate, volumetric flow requirement, and any special material or atmosphere conditions, to receive a centrifugal fan specification and pricing.
Frequently Asked Questions
What is the difference between a centrifugal fan and a centrifugal blower?
In industrial applications, the terms centrifugal fan and centrifugal blower refer to the same product, a fan that moves air radially outward using a rotating impeller. Both terms appear in Fanquip’s product descriptions and in the Australian industrial market. Buyers searching for either term will find the same Fanquip centrifugal fan range.
When should I use a centrifugal fan instead of an axial fan?
Centrifugal fans suit applications with significant system resistance, including long duct runs, filter banks, material conveying, or process equipment with internal resistance. Axial fans suit open extraction and general ventilation with low resistance. If the fan must push air through more than a few metres of ductwork or through filter media, centrifugal is typically the correct choice.
Which centrifugal fan suits a spray booth?
The backward inclined centrifugal fan suits spray booth extraction. Its self-limiting power characteristic prevents motor overload as filter loading increases over time, and its clean air design is appropriate for paint and solvent vapour exhaust.
Can Fanquip centrifugal fans handle grain and agricultural materials?
Yes. Fanquip’s materials handling centrifugal fan is specifically designed for particulate-laden airstreams including grain, seed, flour, wood chips, and aggregate. It should be specified for any application where the airstream contains abrasive material in contact with the impeller.
Are Fanquip centrifugal fans Australian-made?
Yes. All three Fanquip centrifugal fan variants are custom built in Australia to the buyer’s specification. Australian manufacture means local lead times, local servicing, and compliance with Australian electrical standards without requiring overseas certification.
Get a custom centrifugal fan specification
Browse Fanquip’s centrifugal fan range to see all three variants, or contact Fanquip’s team to enquire about a custom specification for your application.