The unique smooth ARC with the feedback and filter transducter choke to minimise the ripples and give quality welds and clear X-Rays. Stepless transducting controlled ARC Welding Rectifier. Especially for critical weldingusing low hydrogen and stainless steel electrodes. Perfect open circuit voltage gives goodstrike properties. Large reserve voltage permitting longer welding cables. Varitrans is provided for setting the current through out the entire range, settings can also be changed during welding. No Fuss striking due to start surge current.
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Decal, equipment, permanently adhesive
Roll of 50
Material: White gloss PVC with permanent adhesive, 0.1mm thickness, lifespan 2-3 years from date of delivery, Kraft liner 67 grams.
Base color: 100% Cyan blue. The logo are printed in white, and positioned in the middle of the decal, running 80% of the length.
Decal, rectangular, 205 x 105mm, roll of 50 decals
Size: Rectangular, length 205 mm x height 105 mm, with corners in a 90-degree angle.
Distillation is a separation process that includes the partial evaporation of a liquid phase and the condensation of the resulting gas phase. The rectification columns are used for the separation of liquid phases. They operate according to the principle of distillation. The substance mix recommended for the operation of the experimental plant is water-ethanol. The separation process of rectification is an energy-efficient distillation process with several stages.
Learning objectives/experiments:
Determination of the proportion of ethanol in the feed and in the products
Determination of the tray efficiency of the sieve trays
With different reflux ratios
With different feed levels
Investigation and comparison of a sieve tray column and a packed column
Evaluation using the McCabe-Thiele Diagram
In continuous operation
With different pressures.
The mixed vapour contains a higher concentration of the component with the lower boiling point (ethanol). It leaves the top of the column and is condensed using a condenser and a phase separation tank. Distillation is used to separate liquid mixtures made up of individual liquids that are soluble in one another. Rectification refers to distillation in a counterflow. Part of this condensate is collected in a tank as product while the rest is fed back into the column. The mixed vapour produced then moves upwards in the column. Here, on its way downwards, it undergoes further heating and material exchange with the rising mixed vapour. Ethanol/water is recommended as the liquid mixture for the. It is fed into the column. It partially evaporates on its way to the bottom of the column where it is heated to boiling. The liquid phase moves to the bottom and can be collected in two tanks. This exchange causes the vapour phase to become richer in ethanol and the liquid phase to become richer in water.
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Packed column with raschig rings
Vacuum mode possible with water jet pump
Discontinuous rectification with packed and sieve tray column
All tanks made of duran glass and stainless steel
Adjustment of reflux ratio using valves
Electrically heated evaporator
Tank for top product
Interchangeable columns
Sieve tray column with 8 trays
Condenser and phase separation tank for top product.
