Fast shipping Explosion Proof 20L Rotary Evaporator / rotavap system

Fast shipping Explosion Proof 20L Rotary Evaporator / rotavap system


The Industrial Rotary Evaporator is newest design, 50L big volume evaporation flask, high evaporation rate, and has beautiful appearance and compact size, electric and hand lifting water bath, more convenient.Floor type with brake casters, easy to move。


It is one of the necessary basic instruments in the chemical industry, pharmaceutical industry, universities and research laboratories and other units etc. Usually worked with low temperature circulating pump and vacuum pump.


How to use a rotovap (rotary evaporator) - YouTube

SKU: 20

    Model RE-1020
    Working temperature℃ 5~35
    Voltage(V) Three phase 220-240V/380v/60Hz
    Rotary speed control Digital direct current stepless speed
    Mine engine speed(RPM) 20-130
    Rotary Power(W) Brushless 250
    Temperature control(℃) Digital display temperature control,room temperature -99
    Maximum vacuum(Pa) 399.9(Below 3mmHg)
    Rotating bottle(L) 20
    Recovery bottle(L) 10
    Condenser tube Vertical main+sub condenser,high effeciency reflux condenser
    (Water)Evaporation rate(L/h) >5
    Lifting function Electric lift
    Whole power(KW) 4
    Outline dimension(mm) 1250×600×2100


    1. Advanced EL sealing system keeps high vacuum degree.
    2. Double condenser, collection rate over 95%.
    3. Continuous feed are available. (Inlet Valve)
    4. Reasonable structure, exquisite material.
    5. Mechanical parts are made of stainless steel and aluminum die casting.
    6. Adopt corrosion and high temperature resistance borosilicate glass.
    7. Rubber parts adopt new standard materials, easy to change for users.
    8. Built-in transmission system, frequency conversion speed regulation, stable speed.
    9. Note: Explosion-proof system is optional.
                 110 V/60HZ can be customized.



    Roto-evaporation requires mechanical rotation of a flask under vacuum. The rotation of the flask increases the surface area of the solvent to be removed, increasing the rate of evaporation, and reducing the risk of "bumping": when a large pocket of solvent vapor forms rapidly and displaces the surrounding liquid. The vacuum reduces the boiling point of the solvent, as well as providing a means to separate the solvent from the compound of interest.


    This video will explain the process of rotary evaporation, including the key components of a rotary evaporator, or "rotovap". Advice for the most common organic solvents and crucial safety considerations will be presented.




    • Pour the mixture of solvent and desired compound in a round bottom flask. Best results are achieved when the flask is filled less than half full of the solution.
    • Fill the rotovap cold traps with dry ice.
    • Attach a glass "bump trap" which prevents any solution from entering the main part of the rotovap. Secure with a Keck clip.
    • With a Keck clip attach the flask and bump trap to the adapter portion of the roto-evaporator.
    • Lower the flask into the water bath. This helps to prevent the flask from disconnection.

    2. Rotary Evaporator Operation

    • Start the rotation. Different speeds are preferable for different volumes.
    • Slowly start increasing the vacuum. The vacuum is at the proper strength when: 1) condensation of the solvent can be seen on the cold finger or in the receiving flask, or 2) the solvent begins to bubble.
    • Turn on the heat for the water bath. Recall from general chemistry that vacuum reduces the boiling point of the solvent, so significantly lower temperature is needed to evaporate the solvent using a rotovap than at STP.
    • Adjust the vacuum setting as needed.
    • When all solvent has been removed turn off the vacuum and return the flask to atmospheric pressure.
    • Stop the rotation.
    • Raise the flask from the bath.
    • Remove the flask from the adapter.
    • If there is more solvent to remove it can be added it to the same flask and the procedure is repeated. Remember to empty the receiving flask when the evaporation is complete.



    Rotary evaporation can be used to separate solvent from many organic, inorganic, and polymeric materials. It is crucial that the desired compound has a lower boiling point than the solvent and that the compound does not form an azeotrope with the solvent. If these conditions are true, rotary evaporation may be a very efficient technique to separate solvent from the compound of interest. Lower boiling solvents work best, however, rotary evaporation is commonly used to remove water. Higher boiling solvents such as DMF and DMSO are more easily removed using other techniques such as lyophilization, however, with a very good vacuum pump, they may be removed using rotary evaporation.


    The price is factory price, not include freight. Please tell us your address if you need reference freight.  Click here and send us email.