Dust Control

Allied designs custom dust extraction systems based on mill-specific requirements. A typical system includes fans, cyclones, baghouses, airlocks and feeders and ducting components. The major components are of standard design. Equipment is sized to meet the specifications based on plant size, raw material particle type, residue transfer and storage requirements.

Allied also offers Rotary Car Dump Systems for dust free unloading trucks and railway cars.

Centrifugal Fans

Allied manufactures a wide range of centrifugal fans (radial blade, radial tip and backward inclined). These fans have been developed for long, maintenance-free operation in demanding industrial material handling processes. Allied’s fans are selected from standard designs to fit specific process requirements.


Allied has built thousands of cyclones for various applications. Standard efficiency cyclones are used where baghouse filters are required to cope with emission standards. High efficiency cyclones are used as primary separators and air cleaning devices in many applications. High-pressure cyclones are used as receivers in pneumatic conveying systems. All cyclones have different design requirements and they are custom made for each application.

Baghouse Filters

Increasing demand for a cleaner environment and requirements for lower particulate emissions from the manufacturing processes, result in baghouse air filters being widely used in resource industries. In principle, baghouses are industrial-sized vacuum cleaners. The difference between a baghouse and a household vacuum is the need to continuously remove dust while the baghouse is in operation.

The cleaning mechanisms have been developed over the past 50 years. Early developments used shaker and reverse air systems, while newer baghouse designs use a PulseJet cleaning system (using compressed air) or a High-Energy PulseAir system (using a displacement blower) for cleaning air. Side-by-side comparisons prove baghouses using High-Energy PulseAir are more efficient, deliver the cleanest results and prolong bag life.

Allied manufactures two types of baghouses. ABL PulseJet baghouses are Allied’s own design. This rectangular body baghouse is primarily designed for smaller industrial plants with high demands for particulate emission control. The AC PulseAir baghouse design comes from Air-Cure Inc., an industrial baghouse specialist located in Minneapolis and Allied’s technology partner for the last 15 years. AC baghouses have High-Energy PulseAir cleaning and a round body. They are ideally suited in demanding applications with high airflows, heavy dust loads and 24 hour a day operation. In the forest industry, the AC baghouses are used in panel board plants and increasingly in sawmills. AC baghouses are also well suited to cold environment, to be used in northern mines for example. Allied has manufactured and installed more than 100 AC baghouses over the past years.

The baghouse systems come with Albarrie filter bags and are often equipped with GreCon Fire Protection.

Airlocks and Feeders

Allied’s rotary airlocks are designed for heavy-duty applications. Airlocks are equipped with rotors with rubber tips. Class 3 Airlocks are used for light and medium loading. Class 4 Airlocks are used for heavy loading applications, where ultimate reliability is required.

Hoods and Ducting Components

A dust extraction system includes a variety of custom made collection hoods and interconnecting ducting components. Depending on the process requirements, hoods and ducting components are made of different materials; painted or galvanized steel or stainless steel of various grades.

Rotary Car Dump Systems

Dust free unloading of trucks and railroad cars without visible emissions are essential for efficient and environmental friendly unloading of bulk materials like coal, iron ore, wood pellets and many other. Exclusive Rotary railroad car dump and truck unloader systems are designed for specific application in port terminals, power plants and processing applications.

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