Pressurized Mechanical Filters with AFM (Activated Filter Media)

Pressurized Mechanical Filters with AFM (Activated Filter Media)
Pressurized mechanical filters filled with antibacterial AFM media which provide filtration below 5 microns. MAT AFM Pressurized vessels are vinylester coated for ozone oxidation protection & fabricated to last high salinity environments.They may come fully automated and equipped with PLC and SCADA interface.


Pressurized AFM are rapid, and pressurized multi layer filters which are filled in with Activated Filter Media (AFM) by Dryden Aqua instead of sand to double the process performance. The AFM media offers 300 times more surface area than the sand media, is electrostatically charged to absorb organic substances and small particles and finally the metal oxide catalysts located on its surface make the AFM self sterilizing, as well. The developed filtration speed varies between 20-25m/h at a pressure rate of 2.5 bar. The specific filter configuration offers extra resistance to bio-fouling, to bio-coagulation and does not permit any unfiltered water to escape due to transient wormhole water channeling.

Our AFM filters are specifically designed to provide backwash operation, by reversing the water delivery to flow from the lower to the higher media layers collecting and discharging the deposited particulate matter to the effluent waste line. AFM vessels are fabricated using Bobbin Wound and to provide ozone osmosis protection they are coated by venilester layer.

AFM filters work with 50% less water flow compared to traditional sand filters. The media used allow long lasting usage.


AFM media maybe used for any pressurized vessel. MAT AFM filters are specifically designed and fabricated pressurized vessels for fish hatcheries, fish farms and other aquaculture applications.


The wastewater is dispersed evenly over the Activated Filter Media by diffusers which are located on the upper part of the vessel. As the water permeates down through the media layers, the particulate material carried in the water is deposited to the Activated Filter Media (AFM). The AFM is manufactured from amorphous aluminosilicate glass, subjected to form a large nanostructure effective area. The metal oxide catalysts located on the media surface give a high redox potential making AFM media self-sterilizing, against undesirable microorganisms.


  • More than doubled performance over a conventional sand filtration system
  • Higher effective filtration surface than sand
  • Secures Biodynamic Stability
  • Limits untreated water escape
  • Substantially lower chlorine oxidation needs
  • 50% lower backwash water rate
  • AFM media do not require replacing
  • AFM is a Self-Sterilizing Media
  • No bacteria growth, thus no bio-fouling & no bio-coagulation

Pressurized Mechanical Filters with AFM (Activated Filter Media) - SPECIFICATIONS

Pressurized Media Filter TankBody Diameter (mm)Design Pressure (kg/cm²Media DepthFiltration Flowrate
Filtration Speed (m3/h/m2)Filtration Area (m2)Connection Flanged/UnionConnection Size (mm)Construction Type (Horizontal/Vertical / Stacked Dual Design)Total AFM Media Capacity (Kg)Total AFM Media Capacity (Kg)Height (mm)Sight GlassOptional Design Pressure (kg/cm²Nozzle PlateAir Backwash ConnectionOzone Protection
FT500500314 /5/620/25/300.19UNION50VERTICAL2852371880OPTION4.5OPTIONonly with nozzle plateOPTION
FT600600317/8/1020/25/300.33UNION50VERTICAL4954111880OPTION4.5OPTIONonly with nozzle plateOPTION
FT8008003110 /12/1520/25/300.5FLANGED63VERTICAL7506231950OPTION4.5OPTIONonly with nozzle plateOPTION
FT100010003117/21/2520/25/300.86FLANGED75VERTICAL129010711900OPTION4.5OPTIONonly with nozzle plateOPTION
FT120012003122/27/3320/25/301.13FLANGED90VERTICAL169514071950OPTION4.5OPTIONonly with nozzle plateOPTION
FT140014003130 /38/4620/25/301.54FLANGED110VERTICAL231019171950OPTION4.5OPTIONonly with nozzle plateOPTION
FT160016003140/50/6020/25/302.01FLANGED140VERTICAL301525022000OPTION4.5OPTIONonly with nozzle plateOPTION
FT180018003150/63/7620/25/302.54FLANGED140VERTICAL381031622050OPTION4.5OPTIONonly with nozzle plateOPTION
FT200020003162/78/9420/25/303.14FLANGED160VERTICAL471039092100OPTION4.5OPTIONonly with nozzle plateOPTION
FT220022003176/95/11420/25/303.8FLANGED160VERTICAL570047312200OPTION4.5OPTIONonly with nozzle plateOPTION
FT240024003186/108/13020/25/304.34FLANGED160VERTICAL651054032250OPTION4.5OPTIONonly with nozzle plateOPTION
FTH25002000x2500(L)31.282/102/12320/25/304.1FLANGED160HORIZONTAL73806125~2150OPTION4.5OPTIONonly with nozzle plateOPTION
FTH30002000x3000(L)31.2100/125/15020/25/305FLANGED160HORIZONTAL90007470~2150OPTION4.5OPTIONonly with nozzle plateOPTION
FTH40002000x4000(L)31.2140/170/21020/25/307FLANGED225HORIZONTAL1260010458~2150OPTION4.5OPTIONonly with nozzle plateOPTION
FTH5000DS2000x5000(L)31.2177/221/26520/25/308.8FLANGED225HORIZONTAL1584013147~2150OPTION4.5OPTIONonly with nozzle plateOPTION
FTH2500DS2000x2500(L)X231.2(82/102/123) X 220/25/304.1 X 2FLANGED2 X 140HORIZONTAL STACKED DUAL DESIGN1530012699~4300OPTION4.5OPTIONonly with nozzle plateOPTION
FTH3000DS2000x3000(L)X231.2(100/125/150) X 220/25/305 X 2FLANGED2 X 160HORIZONTAL STACKED DUAL DESIGN1800014940~4300OPTION4.5OPTIONonly with nozzle plateOPTION
FTH4000DS2000x4000(L)X231.2(140/170/210) X 220/25/307 X 2FLANGED2 X 200HORIZONTAL STACKED DUAL DESIGN2520020916~4300OPTION4.5OPTIONonly with nozzle plateOPTION
FTH5000DS2000x5000(L)X231.2(177/221/265) X 220/25/308.8 X 2FLANGED2 X 225HORIZONTAL STACKED DUAL DESIGN3168026294~4300OPTION4.5OPTIONonly with nozzle plateOPTION