| Yardney Automatic Backwashing Multi-Media Filters are designed for enhanced water quality filtration. These permanent media automatic backwashing filters will remove organic and/or inorganic suspended solids down to 5 microns and below in size and will entrap greater amounts of suspended solids contaminants than sand media filters. Through the use of automatically controlled backwashing, the filter will operate "on-line" for extended periods of time prior to the short backwashing cycle. Automatic filter operation is monitored on both elapsed time as well as pressure differential. When the controller "calls" for a backwash as a result of pressure differential or elapsed time, the backwashing function utilizes a portion of the clean filtered water produced by the system to clean the media bed. Single tank systems utilize unfiltered water for backwashing. Optional external backwash water sourcing systems are available for both single and multiple tank systems.
The Yardney Multi-Media Filter utilizes a vertical side shell depth of 60" with layered graded beds of filtration media. Through the use of multiple layers of specially selected filter media, "progressive filtration" is achieved through the media layers. The first layer of filter media entraps and holds larger sized particles allowing smaller particles to be removed in subsequent media layers. The final media layer "polishes" the water removing suspended solids down to 5 microns in size and smaller.
Yardney Multi-Media Filters are ideally suited for use where stringent water quality standards are required or where higher levels of suspended solids are present. These applications can include water re-use applications, water pre-treatment applications for reverse osmosis and de-ionization systems, or as a pre-treatment system prior to disposable bag or cartridge filters. Yardney Multi-Media Filters are also widely used as primary filters for removal of suspended solids in incoming plant water or in waste water clean up applications. Air scour and surface wash options are available if required. |
