Vapour-Liquid-Equilibrium Apparatus
The vapour-liquid phase equilibrium of mixtures with two or more components are an essential basis for the determination of the required number of theoretical separation stages and other distillation conditions. The model VLE 110 is designed for operation under vacuum (option A) or at over pressure up to 3 bar absolute (option B) with a charge volume of approx. 80 - 100 mL and temperatures of up to 250°C.
The glass apparatus features an electrical immersion heater, made of quartz-sand material is located in the central bottom part of the glass apparatus effecting evaporation. The reflux circulation streams are intensely stirred in
a mixing chamber which ensures a quick adjustment of the equilibrium.
Sample takeoff of both phases (liquid and vapour) can be realised either by automatically controlled valve plungers via solenoid valves or can alternatively be taken from the circulation streams via a gas-tight syringe.
An additional sampling port offers the possibility to take gaseous samples of the vapour phase which is particularly useful for mixtures with miscibility gaps.
The system is delivered with a micro processor based control device for precise and reliable work.
Our latest redesign includes improved software functions and an MC Excel data export option.
All materials that come into contact with the product are made of glass, PTFE, FEP, and Viton (FKM) or optionally Kalrez (FFKM).
Technical Data:
Operation Temperature: 250° C
Operation Pressure: -ATM,
-vacuum 1000 – 1,0 mbar
-overpressure up to max. 3000 mbar abs.
Charge Quantity per measurement: approx. 80 - 100 ml
Mains Supply: 230 V, 50/60 Hz
Dimensions (w x h x d): 0.65 x 0.97 x 0.55 m
The apparatus consists of:
1 mounting frame for all unit parts, including all holders
1 universal glass apparatus, complete with silvered vacuum mantle, cooler, evaporation and mixing chamber and
vacuum-tight screwing for sample takeoff by means of the syringe
2 valve plungers for liquid and vapour phase
2 solenoid coils for activation of sample takeoff valves
1 electrical immersion heater, made of quartz-sand material, for evaporation chamber
1 electrical stirrer drive for mixing chamber
10 final receivers with screw caps
1 filling funnel with Teflon cock
1 temperature sensor Pt100, diameter 6 mm, heating chamber, complete with connection cable and plug
1 temperature sensor Pt100, diameter 6 mm, vapour phase, complete with connection cable and plug
1 Phase-equilibrium control device DCD-VLE 110 with modern microelectronics, offers high operating comfort,
safety and reliability.
The control device offers the following functions:
o display of the set value and actual value
o input of the parameters via operation software
o control of the rotating temperature
o control of the heating mantle and line heating
o operation of the takeoff valve - manually -
o control of the vacuum (option vacuum equipment)
o control of the pressure (option pressure equipment)
1 PïloDist IP65 touch screen (15,6") panel controller with operation software