To prevent the leakage of toxic gas during the operation of the rotary evaporator

Shanghai Haozhuang Instrument Co., Ltd. develops the Hao Zhuang (LNB) brand rotary evaporator, which is energy-saving and environmentally friendly, leading the country. Professional manufacturing is more secure and affordable. The company has first-class technical staff and a good team of technicians, with advanced technology and strong development strength. Since the establishment of the company, products and services have been recognized by customers and have a good reputation. The company upholds "integrity. Professionalism. Innovation. Growth "The business philosophy provides elaborate service to customers.



After turning on the vacuum pump, it was found that the vacuum could not be hit. Check whether each bottle mouth is well sealed, whether the vacuum pump itself leaks, whether the sealing ring at the shaft is intact, and a vacuum switch connected in series with the external vacuum tube can improve the recovery rate and evaporation speed.


Using the system vacuum negative pressure, the liquid material can be sucked into the rotating bottle through the hose at the feeding port, and the liquid material should not exceed half of the rotating bottle. The instrument can be fed continuously, please pay attention when feeding 1. Turn off the vacuum pump 2 / stop heating 3. After the evaporation stops, slowly open the tube cock to prevent backflow.


This instrument is equipped with a specially designed water bath. It must be filled with water and then powered on. The temperature control scale is 0-99 ° C for reference. Due to the existence of thermal inertia, the actual water temperature is about 2 degrees higher than the set temperature. The set value can be corrected during use, such as: you need the water temperature 1 / 3-1 / 2. Remove the power plug with a pull out.


Turn on the switch of the electric control box and adjust the knob to the best evaporation speed. Pay attention to avoid the vibration of the water bath and connect the cooling water.

Recovery of solvent

First turn on the feed switch to deflate, then turn off the vacuum pump, and remove the solvent in the collection bottle.


â—† Each equipment needs to be coated with a layer of vacuum grease before the installation of each grinding port, sealing surface seal ring and joint.

â—† Water must be added before the heating tank is energized, and dry burning without water is not allowed.

â—† RE-201D must be screwed (19) into the safety hole to prevent damage to the flask.

â—† If the vacuum cannot be pumped up, please check:

â‘  Whether each joint and interface are sealed

â‘¡ Is the sealing ring and sealing surface effective?

â‘¢Whether the vacuum grease is coated between the main shaft and the sealing ring

â‘£Whether the vacuum pump and its leather tube leak

⑤ Is there any crack, chipping or damage on the glass parts?

Maintenance instructions

1. Check the instrument carefully before use, whether the glass bottle is damaged, and whether the interfaces are consistent, pay attention to take it lightly.

2. Wipe each interface with a soft cloth (can be replaced with a napkin), then apply a little vacuum grease. The vacuum grease must be covered after use to prevent the ingress of lime sand.

3. Each interface should not be tightened too tightly, and it should be loosened regularly to avoid the connector biting due to long-term locking.

4. First turn on the power switch, and then let the machine run from slow to fast. When the machine is stopped, the machine should be in a stopped state before turning off the switch.

5. The PTFE switches everywhere can't be tightened excessively, which is easy to damage the glass.

6. Every time you use it, you must use a soft cloth to wipe off all the oil marks, stains and solvents left on the surface of the machine, and keep it clean.

7. Loosen the PTFE switches after shutdown, and the PTFE piston will be deformed when it is still in working condition for a long time.

8. Regularly clean the sealing ring by removing the sealing ring, checking whether there is dirt on the shaft, wiping it with a soft cloth, then applying a little vacuum grease, and reinstalling it to keep the shaft and the sealing ring smooth.

9. The electrical part must not enter the water, and it is strictly forbidden to get wet.

10. It is necessary to purchase the original genuine parts of the original factory, and the use of other parts at will will cause fatal damage to the machine.

11. When doing any repair or inspection on the machine, be sure to cut off the power supply and water source first. Note that this equipment is a fragile product, please be careful when using it. The damage of fragile products is not covered by our warranty.

Rotary evaporator maintenance

Leakage is a common failure phenomenon of the evaporator, and it should be checked frequently during use. The leak can be checked with phenolphthalein test paper. Because ammonia is alkaline, it turns red when exposed to phenolphthalein test paper. When you see it with your eyes, the leak point is usually somewhere in the evaporator. You can also use soapy water to find the leak. The inspection of Freon evaporator leaks can use halogen lamps and halogen leak detectors, or use soapy water to find leaks.

During the inspection, you can first use the eye to see if there is oil on the evaporation pipe, because Freon and oil can be miscible, and when Freon leaks, it may also leak out from the leakage point. When using a halogen lamp to detect leaks, if there is a Freon leak, the flame of the halogen lamp will turn blue, light green, grass green, purple green, purple and other colors to determine how much Freon leaks. If the flame is dark green or purple, the phosgene in the flame is poisonous and cannot be checked by this method for a long time.

Shanghai Haozhuang Instrument Co., Ltd. is a company specializing in the research, development, production and sales of cryogenic laboratory equipment and ultrasonic equipment. The company has professional temperature control technicians and advanced production equipment; perfect production technology; guarantee product quality; achieve safe production. Strive to make the products beautiful, practical, stable and cost-effective, and strive to save more experimental space for our customers. We will provide you with safe, stable and high-performance experimental equipment as always, making your experimental process easier. The company's main business and production scope include: testing instruments, laboratory equipment, cleaning equipment, environmental protection equipment and undertaking the design and customization of non-standard products and providing related technical services. First-class technology, first-class service.

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