Questions and Answers about Rotary Evaporator
1. Q: What is the working principle of the rotary evaporator?
A: Under negative pressure conditions, the evaporating flask is rotated in a constant temperature water bath, and the solution forms a thin film on the wall of the bottle to increase the evaporation area. Efficient evaporation at low temperature, condensation recovery, concentration and separation of materials.
2. Q: What is the core technology of rotary evaporator?
A: It is the airtightness of the system, that is, under the influence of various solvents, the system can maintain a high degree of vacuum under the motion conditions. R-Series Rotary Evaporator uses rubber PTFE composite material and glass seal. It is resistant to various solvents and has long-lasting and reliable air tightness. It can maintain a high vacuum of -0.096 MPa or more.
3. Q: What are the main factors affecting the efficiency of the rotary evaporator?
A: For the same specification machine, there are mainly: steam temperature, vacuum degree and cooling water temperature. Due to the heat resistance of certain materials, it is impossible to increase the steam temperature indefinitely during work. Therefore, high vacuum and low cooling water temperature are the two main factors for improving the efficiency (low temperature pumps can be used to reduce the water temperature).
4, Q: What is the difference between a vertical condenser and an inclined condenser?
A: There is no obvious difference in nature. Vertical condensers are becoming increasingly popular due to their small footprint. Large-capacity evaporators generally use vertical condensers.
5. Q: What is the basis for the design of the host lift and water bath lift?
Answer: With the principle of convenience, safety and economy, the international general small machine (below 5L) will lift the main engine and the lift water bath will be more than 5L.
6. Q: How about the explosion-proof property of R series evaporator?
Answer: The rotary evaporator produced by our factory adopts AC motor, stepless speed regulation (or frequency conversion speed regulation), no brush, no spark in operation. The matching water bath control adopts nitrogen-filled sealed relay, thyristor non-contact switch and vacuum switch, respectively. Manual control switch adopts secondary circuit control, control current is less than 3mA, and has good explosion-proof characteristics.
7, Q: How to buy various types of rotary evaporator?
A: The R series rotary evaporators produced by our factory have good corrosion resistance and tightness in terms of structure. The 2L, 3L and 5L machines are suitable for laboratory and small sample tests; 5L, 10L and 20L are suitable for pilot tests; 20L and 50L are suitable for pilot tests and production, especially for the extraction of metal ion contaminants.
8. Q: How does the rotary evaporator compare to other types of evaporators?
Answer: Its main advantages are its compact structure, compactness, high efficiency, intuitive work, and no metal ion pollution. Suitable for laboratory, production test and extraction of valuable materials. Its sealing performance can be comparable to foreign machines, but there is still room for improvement in appearance and human design.
9, Q: how to choose a rotary evaporator Vacuum Pump
A: We recommend the water circulation pump, which has the advantage of resistance to a variety of solvent corrosion, can be vacuumed to -0.093MPa (to meet the requirements of use). Vacuum pump can choose different models according to the size of the evaporator volume. Our factory can supply various types of vacuum pumps.