AJAX Screw Feeders
Screw Feeders are constant displacement devices that employ a variable speed drive to provide volumetric control of powder flow. This type of feeder is usually flood fed from hoppers, silos or bins. The feeder, depending on the application, may have one or more screws. Multiple screws are employed for materials that resist flow and have potential to arch over narrow inlet slots. A screw feeder may also have an agitated hopper section above the inlet in which case the sweep of a blade is used to encourage material into the screw and to disturb consolidated material above the screw.
AJAX produce a range of screw feeders for handling powders and bulk solids. The feeders are usually designed to suit specific applications. Materials of construction are also selected to suit the application and include mild steel, all grades of stainless steel, and high specification alloys. AJAX feeders may be single or multiple screw and can be supplied in conjunction with an appropriate hopper which may, if required, have an agitated section above the inlet. Equipment intended for use within the European Community is supplied with a Declaration of Incorporation or a CE mark as appropriate and can be certified in compliance with EC directives such as ATEX and PED if required. Ajax also produce equipment in compliance with international regulations outside the EU. Special features often incorporated in Ajax screw feeders include the following:
- Retractable Screw and Drive for Easy Cleaning.
- SIP/CIP steam and clean in place facilities.
- Agitated Inlet Hoppers for Cohesive Materials.
- Anti Flushing Valves at the Outlet.
- Plug Sections for Thermal or Environmental Barriers
- Multiple Screws to Facilitate large Hopper Outlets
AJAX screw feeders are used across a wide range of industries from pharmaceutical production to waste handling. Ajax take an integrated approach to hopper and feeder interfacing including flow property assessment for hopper design and screw geometry selection ensuring reliable performance even with the most demanding applications. The feeders we produce range in size from single 20mm diameter screw feeders dispensing a few millilitres per minute to quadruple 750mm diameter screw feeders feeding hundreds of thousands of cubic metres per hour.
Please follow the links below for more information and case studies relating to feeder design and applications.
Agitated Screw Feeders
Plug Feeders for Handling Ash From Biomass Plant
Interfacing Hoppers and Screw Feeders
Atex Compliant Screw Feeder
Equipment for spice and seasoning powder
Agitated Screw Feeders for the Pharmaceutical Industry
Plug Screw Feeders For the Bulk Solids Industry
Please call AJAX on 44 (0)1204 386723 if you have a potential screw feeder application or if you would like more information about screw feeders.