Self Cleaning Filters
Allied Filter Systems Ltd is able to offer two types of self cleaning filters:
Wedge Wire Self Cleaning filters
The liquid flows from the outside to the inside of a wedge wire screen and leaves the filter housing through the higher placed outlet. A seal is located between the lower placed inlet and the upper outlet, limiting any cross contamination between lower (dirty) side and upper (clean) side
Particles are retained on the outside of the screen and are continuously removed from the filter element by a flexible scraper blade. The contaminants are directed to the sump by a laminar flow in the filter and collected in the bottom section of the filter housing.
This collection chamber may be purged either manually or automatically through a valve. An automatic purge system can be set up including an actuator and a time controller or pressure differential initiated valves. The installation of a manual by pass function is advised. Clogging of the filter is almost impossible, because of the special construction of the wedge shaped filter element wires. The filter fineness is established by the width between the wedge formed wires.
DSF (Disc Scraper filters)
The liquid or solids suspension enters through the inlet at the top of the filter, flows freely through the apertures in the cleaning disk and is filtered by the filter screen. Contaminants larger than the micron rating will be stopped on the inside of the filter screen surface, and cleaned liquid exits through the outlet in the lower part of the filter.
The collected contaminants are removed from the inside of the surface by a manually initiated, timer initiated or delta P initiated pneumatic actuated annular scraper. This results in a cleaned filter surface with limited pressure drop and no liquid loss. The continuing flow of product prevents contaminants from returning upwards.
Contaminants are physically and positively pushed into a bottom collection chamber where they accumulate, ready for elimination when the bottom mounted purge valve is actuated. This can be carried out manually or automatically. At pre set intervals the collected solids are purged, either manually or automatically, depending on the degree of automation required. This operation can be carried out without stopping the process.Read more
Filtration level 25– 3000 micron
Several models with Flow rates from 3.5m3/hr upto 130m3/hr
Multiple units can be supplied for higher capacities
Can be manufactured from a variety of materials to enable use in broad range of applications
80oc maximum working temperature
Upto 5 Bar differential pressure
Option to be skid mounted or supplied for wall or machine attachment
Bespoke Stainless Steel Mesh Filters
Allied Filter Systems Ltd manufactures bespoke filters from stainless steel woven wire mesh or perforated plate. Example products include stainless steel mesh panels, filter baskets and discs cut to size. All items are precision manufactured to be dimensionally accurate and can be produced in small volumes as well as in larger batches. Finished articles range in size from just a few centimetres to several metres.
IBF Series Strainers (Inline Basket Filters)
IBF series fabricated strainers are the ideal solution for removing solid particles from a liquid stream. Applications include protection from debris of pumps, meters, valves, nozzles and heat exchangers. The IBF series features inline connections, enabling easy pipeline installation. Standard connection sizes are 1” to 12” flanged (ANSI or DN), with bigger vessels available on request. Fabricated strainers have a bolted lid fitted with a lifting handle and ½” vent valve.
Self Cleaning Filters
The liquid flows from the outside to the inside of a wedge wire screen and leaves the filter housing through the higher placed outlet. A seal is located between the lower placed inlet and the upper outlet, limiting any cross contamination between lower (dirty) side and upper (clean) side. Particles are retained on the outside of the screen and are continuously removed from the filter element by a flexible scraper blade. The contaminants are directed to the sump by a laminar flow in the filter and collected in the bottom section of the filter housing.