Common Faults And Solutions Of Rotating Evaporator

Rotating evaporator is common laboratory equipment consisting of a motor, distillation flask, heating pot, condenser, etc. Before buy rotary evaporator, understanding the principle is an important factor. It is to heat the rotating bottle at a constant temperature under vacuum conditions so that the rotating bottle rotates at a uniform speed, and the material forms a large-area film on the bottle wall to effectively evaporate. The solvent vapor is cooled by the glass condenser and recovered into the collection bottle, which greatly improves the evaporation efficiency.

Rotating evaporator is mainly used for continuous distillation of volatile solvents under reduced pressure, and is often used in chemistry, chemical, biological medicine, and other fields. Rotating evaporator is mainly controlled electronically, and it may malfunction during use, which will affect the performance of the product and the results of the experiment. Therefore, the operator needs to master the solutions to common failures of the rotating rotary evaporator

To buy rotary evaporator for use, the following are some common faults and solutions you should know.

1. Power indicator does not light up
After the instrument is connected to the power switch, the power indicator does not light up: if the power cord is not connected or connected incorrectly, just connect the power cord; if the power switch or circuit board fails, stop using it immediately and contact the manufacturer or contact professional maintenance personnel.

2. Motor does not turn
The motor does not turn: if the indicator light of the electric control box is on, check whether the connection of the external plugin the electric box is loose or disconnected, and then unplug and connect the broken wire; if the indicator or digital display of the electric control box does not light up, update the fuse or confirm that the power supply is not abnormal; if the inverter displays “OU” due to high-frequency interference, just troubleshoot the fault according to the inverter manual.

3. The bath does not heat
The bath does not heat: the green indicator light in the temperature controller is on but does not heat, and the temperature controller displays “over” or “000”, which can be solved by changing the heating ring, solid state relay, or relay board, and temperature controller. Wire the probe or update the probe to solve it.

4. Vacuum can’t be tested
It may be that there is a solvent in the container and is restricted by the saturated ejector pressure. The solvent needs to be emptied and the bottle is empty and tries again; the capacity of the vacuum oil pump is reduced, and the oil (water) needs to be changed.

Carry out cleaning and maintenance; the vacuum hose joint is loose and the vacuum meter leaks, it needs to be tested and eliminated along the vacuum pipeline section by section; if there is debris in the discharge valve and pressure control valve, clean it; the glass wool sandwich panel is damaged and updated or fix it.

5. Abnormal sound
Abnormal sound from the instrument: It may be the seal ring is worn out, just replace it with a new seal ring; it may also be the internal gear worn out, the drive part lacks oil, or the motor fails. In this case, stop using it immediately and contact the manufacturer or repair it. master.

6. The pressure leak and the vacuum is not good
It may be the glass rotating shaft is worn, the sealing ring is worn, the sealing ring is not installed properly, the sealing gasket of the decompression nozzle is aging, the vacuum hose is aging, just update the problem part.

7. Abnormal lifting
It may be the circuit board or motor failure, or the sliding bearing wear or rust. For this, the operator should stop the operation of the instrument immediately and contact professional maintenance personnel.