At present, there are many brands of rotary steaming instruments on the market. Many users do not know how to buy them in the face of so many brands. In response to such a situation, the rotary evaporator manufacturer ZZKD has compiled the precautions for the purchase of rotary evaporators, hoping to help everyone. Make an purchase:

Precautions for purchasing a rotary evaporator

1. What are the most important performance indicators of the rotary evaporator?

The most important thing about the rotary evaporator is the air tightness of the instrument, which is related to the normal use and service life of the rotary evaporator. The air tightness is closely related to the design level, manufacturing level and materials used by different brands. It can be measured by "reaching vacuum" and "vacuum holding time".

2. Is there a way to save energy in large rotary evaporators?

50L rotary evaporator bath power 9KW, 20L rotary evaporator bath power 5KW, when multiple units are used together, power supply is often a problem. The optional steam heating device is an energy-saving and effective solution.

3. Does the power of the bath affect the evaporation speed?

The power level of the bath has a great influence on the evaporation rate, especially for substances with large latent heat (such as "water"). When vaporizing, it absorbs a lot of heat energy, and the rapid evaporation speed of Zui is almost proportional to the large heating power of Zui.

4. What is the difference between glass lifting and bath vortex lifting?

Relatively speaking, the bath is safer to lift and the glass is not easily damaged. Moreover, it is not necessary to lock after the lifting is completed, and the operation is more convenient than the glass lifting.

5. Is the electric lifting function important?

It is very important that the electric lift is a icing on the cake. From the aspects of cost performance, safety, and failure rate, there are still many manual lifters, and almost no electric lift is required for explosion protection.

6. When the tap water temperature is not low enough to condense, what should I do?

In summer, the tap water temperature is close to 30 degrees, and the solvent with a steam temperature of 30 degrees or less is almost impossible to recover. There are three solutions available. 1:zui in place is to choose a cooling capacity matching low temperature cooling water circulation pump. When selecting, pay attention to "cooling capacity" is more important than "zui low temperature". 2: Mini-machine (5L) can be cooled with the optional "cold trap", which costs less but requires ice by hand. 3 "Reducing the degree of vacuum and increasing the temperature of the steam in the case of constant bath temperature, at the expense of evaporation rate.

7. Which one is better for evaporating bottle grinding ports 29 and 24?

Small rotary evaporators Evaporation bottle grinding ISO29 and ISO24 are commonly used in laboratories. The domestic market is mostly ISO24, and the international market is mostly ISO29. The ISO29 has large diameter, high strength and convenient cleaning. At the same time, it is beneficial to upgrade the optional bottle-returning device.

8. What vacuum pump is suitable for the evaporator?

Vacuum pump is a must-match product of rotary evaporator. Evaporation of low-boiling organic solvent usually requires less vacuum (above 0.4KP), and optional water circulation vacuum pump or PTFE diaphragm pump (the latter price is high). Evaporation of high-boiling materials usually requires high vacuum (above 0.4KP). Mechanical rotary vane pumps can be selected. However, the disadvantages of non-corrosion resistance must be protected by cold traps or other methods, and intermittent pumping can be used in operation. Extend the oil change interval.

The above is the full content of "Notes on the Optional Rotary Evaporator". If you want to know more product information or you are interested in purchasing a rotary evaporator, you can contact Zhengzhou Keda Machinery Equipment Co., Ltd. at any time!