THE MEMBRANE DIFFUSER DM-320A

  • The membrane is made of EPDM, uniquely compounded to provide:
    • Long service life.
    • The necessary stiffness and elasticity.
    • Resistance to tear.
    • Resistance to oils.
  • The membrane overlies the polypropylene base plate which is ribbed to ensure high strength.
  • The membrane is fastened to the base plate by means of a rim of stainless steel. This prevents air leakage along the periphery of the membrane.
  • The membrane has numerous small slits through which the air enters the fluid over the membrane in the form of fine bubbles. When air is turned off, the slits close onto the base plate and do not allow leakage of wastewater underneath the membrane.
  • The membrane diffuser DM-320A has a check valve that does not allow wastewater that could have leaked through the slits, to enter the air distribution network. The check valve is shaped as a thickening of the lower central part of the membrane.
  • The membrane diffuser has an outside diameter of 320mm and effective diameter of 285mm.

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TECHNICAL CHARACTERISTICS OF THE MEMBRANE DIFFUSER DM-320A

Air flow per diffuser
1 - 10 m3/h
Diffuser density
0,5 – 3 бр/m2 (max 5 бр/m2)
Standard oxygen transfer efficiency
14 – 28 gО2/m3.m
 
21 - 39% at 4,20 m. submergence
Head losses
10-40 cm. water column depending on air flow
Aeration efficiency
3,0 – 6,7 kgО2/ kWh

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