NQA

Mechanical Filtration

 

Aquaculture, Water & Wastewater Treatment

Environmental & sustainable water treatment by marine biologist

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filter home | on-line shop | backwash recovery | how to operate and install filters  (click here) DIN standard AFM® filters

Specifications for filters 1.2m m to 3m diameter  pdf leaflet

 Standard Equipment

  • The filters are manufactured in acco0rdance to  standards  DIN 19643 and DIN 19605

  • Construction if vessel is in accordance to British Standards BS4994 and German regulations AD-Merkblatt 2000 for wall thickness

    •

  • Pressure test conducted in accordance to British Standards at 1.5 times the maximum working pressure

  • The height of the funnel over the sand and the height from the funnel to the top is even higher than requested with DIN norms

  • CE certified by TUV Germany

  • Maximum working pressure 2.5 bar static test pressure 3.65 bar ( up to 8 bar available)

  • 5 years warranty on filter shell

 

Filter media  for our filters is AFM, a registered product that has been through a major research and development project  with the European Commission and the UK Government authorities and has been tested for almost 20 years. AFM is  certified under Regulation 31 of the the UK Drinking Water inspectorate, AFM is is compliance with European Water Directive (98/83/EC) & (80/778/EEC) and is manufactured under ISO9001-2008 quality  in accordance to and certified to BSEN12902 and BSEN 12904.
Recommended operation parameters

Run phase flow 1 to 15 m3m2hr-1 ( flow rate depends on water type and performance required, max flow for filter is 30 cubm/hr/sqm)

Air scour flow 95  m3m2hr-1 for 5 minutes

Back-wash 45 to 55  m3m2hr-1  back wash water fro 1.5 to 5  minutes

Sight glass DN200

Light to illuminated the water above the filter bed

1x manhole DN 600 on side above nozzle plate

1 x manhole DN 600 on top

2 x Flanges for inlet and outlet in GRP

1x drain, supplied with valve 50mm connection

1 x flange connection on base for air purge, fitted with blanking plate

1 x flanged air relief valve connection (valve included)

Nozzle bottom with nozzles

Conical diffuser

Equipped with lifting ears

Leg support

Colour is green to RAL 6007

Tank construction

Made from polyester resin and fiberglass.

Standard isopthalic acid with a chemical protection layer according DIN18820.

 

 

 

           

Diameter mm 800 1000 1200 1300 1400 1600 1800 2000 2200 2400 2600 2800 3000
Filter surface area m2 0.5 0.78 1.1. 1.43 1.54 2.01 2.54 3.14 3.8 4.52 5.31 6.15 7.07
Water flow @ 15 m/hr m3/hr 7.5 11.7 16.5 21.5 23 30 38 47 57 68 80 92 106
Filter bed depth mm 1200 1200 1200 1200 1200 1200 1200 1200 1200 1200 1200 1200 1200
No of nozzles 0.5mm   40 62 88 103 123 160 204 251 304 361 424 492 564
Total height mm 2650 2750 2850 2900 2950 3050 3150 3250 3350 3450 3550 3760 4020
Display window H5 mm 1400 1400 1400 1400 1400 1400 1400 1400 1400 1400 1400 1400 1400
Window diam mm 300 300 300 300 300 300 300 300 300 300 300 300 300
Manhole A1 mm 200 200 400 400 400 400 500 500 500 500 500 500 500
Manhole A2 mm 400 400 400 400 400 400 500 500 500 500 500 500 500
height H3 mm 230 250 325 350 350 400 400 450 450 475 525 600 600
height H4 mm 1645 1600 1650 1575 1575 1500 1500 1500 1500 1475 1475 1460 1450
Water in C1 DN 80 100 125 125 125 150 150 200 200 250 300 300 300
Water out C2 DN 80 100 125 125 125 150 150 200 200 250 300 300 300
air connection H9 DN 40 40 50 50 50 50 66 65 65 80 80 100 100
drain connection DN 40 40 40 40 50 50 50 50 65 65 65 80 80