The RE-5003 Rotary Evaporator has a rotating flask and a receiving flask, whose maximum capacities are 50L and 20L respectively. The rotating speed is 0-90r.p.m., and the motor power is 250W. The RE-5003 Rotary Evaporator (The capacity of rotating flask is more than 10L.) is equipped with double condensers (main and vice condensers), with a better condensing effect and higher recovery rate. It's especially suitable for concentration, crystallization, separation and solvent recovery of the thermal sensitive material, corrosive material and metal material like the stainless steel, as it works under the vacuum condition and its parts exposed to materials all use the high borosilicate glass and PTFE material
that are heat resistant.

Features of RE-5003 Rotary Evaporator:

1. The rotating body consists of a reliable three-phase asynchrobous motor and a transducer control device;
2. The PTFE and fluorine rubber sealing ring are adopted as a double seal, keeping a high vacuum degree, separating gas and liquid as well as maintaining no backflow;

3. The high-efficiency main and auxiliary condensers are adopted. There is an automatic switching device between the vice condenser and the receiving flask. Below the receiving flask, there is a discharging valve, convenient to recycle solvents. The recovery rate can reach 100%;

4. The rotating flask is connected by a nut, easy to assemble and disassemble;

5. The continuous charging and recycling can be realized;

6. There is a vacuum gauge in the vacuum system so that the optimum vacuum degree can be chosen to low the boiling point of the material;

7. The heating kettle is applicable for both water and oil. It possesses the function of digital thermostat control and can be lifted and lowered manually. There is a closed resistance wire heater as well as a K type sensor controlling the temperature. And the heating grove can move left and right;

8. The dry burning prevention function and the safe temperature loop are available;
9. The equipment can start smoothly and realize positive and negative inversion operation;
10. It's excellently durable. The plate bursting disk glass componnet can be chosen according to customer needs.

1. The circulating water vacuum pump can equip with the rotary evaporator, providing a vacuum environment for reduced pressure distillation. They are applicable for vacuum filtration, vacuum evaporation, vacuum degassing and other operations.

2. The GDSZ series high and low temperature circulating pump, as an efficient equipment, can support the rotary evaporator for quickly cooling or warming.

3. The DLSB series low temperature cooling liquid circulating pump can match with the rotary evaporator as well, which can conduct chemical reaction and medicine storage which requires low temperature environment.

1. Q: What's the operating principle of a rotary evaporator?
   A: Under the condition of negative pressure, the evaporation flask rotates in the thermostat water bath. Then the material forms a large area of thin film on the inner surface of the flask. The solvent vapor is recycled in the receiving flask after being cooled by the high-efficiency glass condenser, which greatly improves the evaporation efficiency.
2. Q: What's the core technology of a rotary evaporator?
   A: The key is system's gas tightness. The system can keep high vacuum degree under all sorts of solvent's corrosion and movement state. Henan Lanphan' s R series instrument, which is sealed by PTFE and rubber as a composite seal, which can stand all sorts of solvent, has reliable gas tightness and can maintain a high vacuum degree above -0.096MPa.
3. Q: What factor decides the working efficiency of a rotary evaporator?
   A: For products of the same specification, the major factors include the steam temperature, the vacuum degree and the cooling water temperature. Restricted by bad heat resistance of some materials, the steam temperature cannot be improved indefinitely while working. Hence, the high vacuum degree and low cooling water temperature are two main factors to improve the working efficiency. (The cryopump can be selected to lower the temperature.)
4. Q: What's the difference between vertical and inclined condenser?
   A: There is no difference essentially. The vertical condenser is gradually well received because of its small occupation and it's generally adopted by large-capacity evaporators.
5. Q: What's the design basis of main engine and water bath kettle rising and falling?
   A: It's mainly based on the principles of convenience, security and economy. Generally, small-size rotary evaporators below 5L use main engine rising and falling and evaporators which are above 5L use water bath kettle rising and falling.
6. Q: How about the anti-explosion ability of R series Rotary Evaporator?
   A: The rotary evaporator manufactured in our factory adopts the AC motor and stepless-speed regulation (or frequency control), without the electric brush and spark in operation. The control of the matching water bath kettle adopts nitrogen-sealed relay, silicon-controlled non-contact tip switch and vacuum switch. The manual control switch adopts twice circuit control, which makes the electric current less than 3mA and the great anti-explosion performance is available.
7. Q: How to select all kinds of rotary evaporators?
   A: As for structure, our R series products all have excellent corrosion resistance ability and leakproofness ability. According to the solvent volume, 2L, 3L, 5L's machine is fit for lab and sample test; 5L, 10L, 20L's machine is fit for medium experiment; 20L, 50L's machine is fit for medium experiment and production, especially suitable for the extraction of metal ion-avoiding polluted material.
8. Q: What's the feature of the rotary evaporator comparing to other evaporators?
   A: Its main merits are compact, efficient and easy to observe, with no metal ion pollution. It's used for laboratory test, pilot production and the extraction of valuable materials. The sealing performance is comparable to those made in foreign countries. But the appearance and the humanization design still have some room for improvement.
9. Q: How to select the vacuum pump for the rotary evaporator?
   A: We recommend the water-circulating vacuum pump which can bear all sorts of solvent corrosion and can vacuumize to -0.095MPa(to satisfy using requirements). According to the solvent volume, we can offer various vacuum pump types.