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Uni-Dust, Powder Recovery Cyclones

Leading the way in the control of excess dust from powder filling machines, the pioneering technology behind the Hanningfield filter-less Uni-Dust powder recovery cyclone offers the ultimate in powder containment solutions.

Manufactured in 316l stainless steel, the Uni-Dust cyclone is a hygienic method of capturing excess dust in the controlled environment of the process room. The equipment is designed to be retrofitted to any dust generating plant; process validation is not effected, making it ideal for both new and existing processes. In-line with cGMP the Uni-Dust makes loss reconciliation a simple matter.

Traditionally, waste material from powder filling equipment such as tablet presses and capsule filling machines is piped away to a central dust collector located in a plant room. This process results in a cocktail of various powders being stored in an uncontrolled area causing potential environmental damage and operator exposure.

The cyclone separates the solids from the clean air, typically capturing 95-99% of excess powder in a collection pot, the air is then passed through an optional “police” HEPA filter which increases system efficiency to 99.99% before the clean rather than contaminated air flows to the normal dust extraction unit. Both the collection pot and the HEPA filter can be supplied as a safe change design offering a total containment solution.

The Hanningfield Uni-Dust cyclone allows collection of these waste materials to be kept within the controlled environment of the process room. A further benefit of collecting these excess materials in the process room is batch loss reconciliation, hence offering vast efficiency improvement.

Batch losses can be verified and recorded by removing the powder collection container at the base of the cyclone and weighing the contents. If required, the powder collector can have a 'safe-change' facility.

The filter-less cyclone design offers extremely high collection efficiency, in some cases to almost 100%. However, to maintain total integrity, a HEPA filter with safe-storage filters should be installed on the dust extraction line from the cyclone chamber.

A number of configurations are possible, allowing the cyclone to be integrated into various system applications.

The Uni-Dust cyclone is designed and manufactured by Hanningfield Process Systems at our UK Headquarters.

Features and Benefits


  • Hygienic stainless steel construction
  • Filter-less design
  • No moving parts
  • "Easy clean" hygienic design
  • Complete "safe change" facility available
  • External HEPA police filter
  • Compact, space-saving design
  • Designed & Manufactured in the UK


  • Keep waste material in the process room
  • Improve the working environment by creating safer and more hygienic conditions
  • Reconcile batch losses
  • Improve GMP and site safety standards

Technical Specification

Material of Construction: Stainless steel (304 or 316)
Powder Capture Rate: Typically 95-99%
Height: Ranges from 475 to 1240mm.
Body diameter: Ranges from 100 to 300mm.
Version: Mobile or stationary version available
Explosion Protection: ATEX or Non-ATEX version available

Typical Applications

Capture excess powder from tablet presses
Capture excess powder from capsule filling machines
Capture excess powder from sachet filling machines
Capture excess powder from inhaler filling machines
Capture excess powder from tablet drills
Capture excess powder from pharmaceutical processing applications
Capture excess powder from food processing applications
Capture excess powder from chemical processing applications