WFI Distillation Stills

WFI Distillation Stills

  • The units comply with international standards as cGMP, USP, ISPE, ASME BPE and other, international regulations.
  • Standard steam heated multi-effect units are available up to 7000 L/h WFI production with 7 or 8 columns
  • Aqua Zero Multi- and Single-effects are the most reliable units on the market with a distillate quality exceeding the specifications of USP, EP and JP for “Water For Injection”.


  • Low steam velocity to avoid dragging over of water droplets to the distillate side.
  • A multiple step droplet separation by low velocity in combination with a regulated Column water level and true cyclone.
  • Heat exchangers fully submerged in water giving a tensionless operation.
  • Proportional regulation of steam and water supplies for automatic adaption to Variating conditions.
  • High accessibility for easy service.
  • This design has proven to be extremely reliable and result in a very low Life Time Cost.
  • Also this design has had a number of followers over the years.


  • Droplet separation by Low steam velocity & cyclone:
    • An average low steam velocity of 1 m/sec is achieved as the width of the column diameters are related to the clean steam physical volume in the columns, allowing a droplet separation by gravity thus avoiding carryover of particles and pyrogens to the clean, distillate side.
    • In the final step cyclone separation takes place to ‘polish’ the quality of the pure steam.
  • Float type Heat Exchangers:
    • AQUA-ZERO ‘float type’ heat exchangers are fully submerged in the boiler water which ensures a tensionless operation with free expansion and contraction avoiding cracks, pin holes and/or exhaustion in welds or materials.
    • The thermo-siphon effect with natural circulation increases the efficiency.
    • The exchanger tubes are both expanded and welded to the tube sheet for long life time of the exchangers.
  • Proportional media regulation:
    • All media are regulated proportionally for a stable balance between the columns under variable conditions of WFI and/or PS production especially during COMBI operation.
  • Service and maintenance:
    • The units are designed for high accessibility and easy dismantling for service and maintenance. The use of internationally, proven valves and components ensures a good function and long life time.
    • By the column sight glasses internal inspection can be made without dismantling.
  • Flexible design and COMBI function:
    • The units are tailor made to meet the client’s individual, specific demands and the required WFI + PS production.
    • The units can be designed to produce almost any quantity of Pure Steam without affecting the WFI production.


There are no reviews yet.

Be the first to review “WFI Distillation Stills”