| General    Specifications: | 
  
    | Type : | Fine bubble tube    diffuser-vertical mounting design
 | 
  
    | Size : | 90 mm dia X 250 mm length | 
  
    | Connection    : | 3/4" BSP | 
  
    | Construction    : | •Robust support made of PVC +    ABS With ¾" BSP Male-Female thread
 • Diffusing tube with special perforation
 • Fixing element
 • Low buoyancy construction
 • Floodable
 | 
  
    | Bubble    size : | 1.0 - 2.0 mm | 
  
    | Perforation    size and no. : | 0.6/1 mm and 7380 no. of slits | 
  
    | Tube    material : | EPDM/SILICON | 
  
    | Tube    Description : | Tube Ø90 mm with staggered    horizontal special perforation, Aeration zone
 approx. 550 cm2/per piece
 Unperforated zone with valve effect allows
 intermittent operation
 | 
  
    | Tube    endurance : | Constant quality for many    years Operation times of 7 - 10 years are usual, up to
 12 years of operation
 have been reached, good resistance against
 ozone, weather influence, aging various
 acids and lye
 | 
  
    | Oxygen    transfer efficiency :
 | OTE valve up to 24g O2 / Nm3 X m    have been measured by an independent institute for the
 VMD diffusers
 OTE values depend on diffuser density, depth oair introduction and the air    flow rate
 | 
  
    | Air-flow    range per diffuser :
 | 0 - 10 m3  / h X m (excellent air    controllability) Suitable for intermittent operation
 Optimal fumigation range 2 - 6 m3  / hr. per
 diffuser
 | 
  
    | Head    loss : | 45 - 92 mbar +/- 10 mbar | 
  
    | Connection    : | Nipple 3/4" thread | 
  
    | Application    : | Ideal for SAFF System, for high    TDS, SS contained effluent
 |