Glass Water Still for double distillation

Specifications and features

  • Glass Water Still (fully automatic) for double distillation, suitable for both bench and wall mounting.
  • Very good distillate quality; conductivity:
    single distillate: approx. 2.2 µs/cm at 25 °C
    double distillate: approx. 1.6 µs/cm at 25 °C (see "Technical Details").
  • Electronic level control during the whole distilling process.
  • Electronic impurity detector effects rinsing and cleaning of the evaporator by automatic water change.
  • Water level control in the boiler automatically switches off the power in case of water shortage.
  • Economical energy consumption by distillation of the heated cooling water.
  • Water saving through automatic water cut-off. Unnecessary water consumption will be avoided.
  • Sterillisation of the condensers by steam.
  • Visible distillation process due to the easily removable, unbreakable front screen which does not steam up.
  • Quartz sheathed heating elements.
  • Evaporators, condensers and overflows are made of DURAN® / Borosilicate glass 3.3. Condensers with dribble guard.
  • Distillate withdrawal through hose connection at the right-hand side.
  • CO2 degassing through outlet in the condenser.
  • Outer housing made of electrolytically galvanised sheet steel, electrostatically powder coated with epoxy resin.
  • Water supply through a built-in solenoid valve with connection for pressure hose 1/2" (inner ø approx. 12.7 mm).
  • Power supply through included mains cable (without plug). (2304 model)
  • Cooling water outlet with hose connection 1/2 inch (inner- ø approx. 12.7 mm).
  • Hoses for water in- and outlet are available as accessory.


GFL Water Stills are used in research and development e. g. for preparing bacteriological and medical samples, for cell and tissue cultures as well as for the production of reagents and unguents. Moreover, distillate is used for cleaning and sterilisation processes, for buffered solutions as well as microbiological and analytical applications and HPLC, too.

Technical details
Model 2302 2304
Capacity 2 l / h 4 l / h
Conductivity Single distillate:
approx. 2.2 µs / cm at 25 °C
Double distillate:
approx. 1.6 µs / cm at 25 °C *
Single distillate:
approx. 2.2 µs / cm at 25 °C
Double distillate:
approx. 1.6 µs / cm at 25 °C *
Distillation type double double
Material Duran glass Duran glass
Operation fully automatic fully automatic
Storage tank capacity without storage tank without storage tank
Additional features self-cleaning + sterilisation self-cleaning + sterilisation
Cooling water required approx. 96 l / h approx. 144 l / h
Minimum water pressure 3 bar to max. 7 bar 3 bar to max. 7 bar
Exterior dimensions
(W x D x H)
650 x 365 x 390 mm 650 x 365 x 390 mm
Electrical connection 230 V / 50...60 Hz / 2.9 kW ** 400 V / 50...60 Hz / 5.8 kW
3 PH/N/PE three-phase current **
Net weight approx. 24.0 kgs approx. 24.0 kgs
Gross weight
(cardboard box)
approx. 30.5 kgs approx. 31.5 kgs
Gross weight
(wooden case)
approx. 70.0 kgs approx. 70.0 kgs
Packing volume approx. 0.34 m3 approx. 0.34 m3

* Value averaged by Institut Fresenius for operation with tap water. The distillate quality depends on the quality of raw water.
** other voltages on request

(All designs are subject to change without notice)