With the increasing number of rotary evaporator mode,many customers are confused to choose the mode they needed when burying rotary evaporators.You can easily purchase a rotary evaporator by simply understanding the following questions.
What are the key performance indicators to pay attention to when purchasing a rotary evaporator?
The most important index of rotary evaporator is air tightness, which is the key factor of whether the instrument can be used normally and its service life.Different brands of design and manufacturing levels as well as the selection of sealing materials are different, customers should pay more attention to the purchase.This can be measured by reference to the vacuum achieved and the vacuum holding time.
Electric lift or handle lift,which one is better?
Electric lifting like icing on the cake.But there are explosion-proof requirements almost do not consider electric lifting.Considering cost performance, safety, failure rate and other factors, more customers buy manual lifting rotary evaporator.
How to choose a matching vacuum pump when purchasing a rotary evaporator?
Vacuum pump is one of the necessary products of rotary evaporation, users can choose according to the actual situation. Generally speaking,desk top vacuum pump is one of the hot products,for its light weight,anti-corrosion,polluted free as well as low cost,and it is suitable for under 5 L rotary evaporator. More than 5L rotary evaporator use vertical vacuum pump also with features of polluted free,anti-corrosion and pumping capacity is larger. The working medium of rotary vane vacuum pump is oil, with high speed, large pumping capacity, can be used alone or as a pre-stage pump and pre-pump for various high vacuum systems.The diaphragm vacuum pump is small in size, light in weight, and powerful in pumping work, but it is higher in cost than the above.Does the power of the bath pan affect the evaporation rate?
The power of the water bath greatly affects the evaporation speed. In particular, when vaporizing a substance with a large latent heat such as water, gasification absorbs a large amount of heat energy, and its fastest evaporation rate is almost proportional to the maximum heating power.
What if the temperature of the water is not low enough to condense?
In summer, the tap water temperature is close to 30 ° C, and the solvent with a steam temperature of 30 ° C or less is almost impossible to recover. At this point we can use the following methods:
1.choose a low temperature circulating water pump .Note that the refrigerating capacity is more important than the minimum temperature.
2. Small rotary evaporator below 5L can be equipped with cold traps for ice cooling, which costs less but requires ice to be applied by hand.
3. Reduce the vacuum degree and improve the steam temperature,At the expense of evaporation rate, the temperature of the bath is constant.
Is there any difference between glass lifting and bath pan lifting?
The bath pan is generally safer to lift, the glass is not easily damaged, and it does not have to be locked after the lift is completed. The operation is more convenient than the glass lifting.
I believe that the answers to these questions will help you purchase a rotary evaporator. If you have any other questions, please contact Lanphan Technology to answer your questions.