There are many problems that need to be paid attention to during the use of the rotary evaporator. If it is used improperly, it is easy to cause damage to the rotary evaporator. Therefore, the user needs to master the precautions for use. Today we will introduce the use of rotary evaporators, I hope to help everyone. 1. The glass parts should be handled gently and gently, and should be washed, dried or dried before loading. 2. Each grinding port, sealing surface sealing ring and joints need to be coated with a layer of vacuum grease before installation. 3. The heating tank must be filled with water before it is energized. It is not allowed to dry without water. 4RE-52B must be screwed into the fuse hole (19) to avoid damage to the flask. 5. If the vacuum cannot be pumped up, check it. (1) Each joint, whether the interface is sealed (2) Sealing ring, whether the sealing surface is effective (3) Is the vacuum grease between the main shaft and the seal ring coated? (4) Whether the vacuum pump and its hose are leaking (5) Whether the glass piece has cracks, chipping or damage 6. About the degree of vacuum Vacuum is the most important process parameter of a rotary evaporator, and users often encounter vacuum problems. This is often related to the nature of the solvent used. Biochemical and pharmaceutical industries often use water, ethanol, acetic acid, petroleum ether, chloroform, etc. as a solvent. Generally, vacuum pumps cannot withstand strong organic solvents, and special vacuum pumps with strong corrosion resistance can be selected. (Recommended to use water circulation vacuum pump, available from the company) The method of checking whether the instrument leaks: one by one pinch off the external vacuum tube, observe the vacuum gauge on the instrument, can keep it for five minutes without leaking. In the event of a leak, check that the seals on each seal joint and the rotating shaft are valid (see Maintenance). Conversely, the instrument is normally checked for vacuum pumps and vacuum lines. 7. About motor temperature rise The motor of the instrument adopts three-phase, 220V special motor, E-class insulation, and the winding adopts polyester high-strength enameled wire. When the altitude is less than 1000m and the ambient temperature does not exceed 40°C, the surface temperature rise of the motor is continuously used (motor surface temperature and ambient temperature). The difference is not more than 45 ° C is normal, if the temperature rise exceeds 45 ° C to check the relevant transmission lubrication system. Shanghai Jiapeng Technology Co., Ltd. specializes in: UV analyzer, three-use UV analyzer, dark box UV analyzer, black box UV analyzer, black box UV analyzer, portable UV analyzer, three-use UV analyzer, dark box , UV detectors, partial collectors, constant current pumps, peristaltic pumps, gel imaging systems, gel imaging analysis systems, chemiluminescence imaging analysis systems, photochemical reactors, vortex mixers, vortex mixers, glass chromatography columns, Gradient mixer, gradient mixer, nucleic acid protein detector, glass chromatography column, fluorescent whitening agent analyzer, fraction collector, rubber cutting instrument, blue gel cutting instrument, chromatography system and other products. Welcome to inquire. Shanghai Jiapeng Technology Co., Ltd. The knife is a must for erver kitchen .And we have great quality awesome product.It is precision forged from single piece of high-carbon German stainless steel; laser-controlled and tested cutting edge.The utility knife is perfect for peeling and paring fruits and vegetables.The chopper is sharp for cutting the food. We have chopper,chef knife, bread knife, caving knife,boning knife,utility knife . Kitchen Knife,Chef Knife,Kitchen Knife Set,Sharp Kitchen Knives MEO DEMO CO., LTD. , https://www.meodemo.com