Researchers who do research work know that during the laboratory experiments, it is often necessary to use cooling and cryogenic liquids to cool down or thermostat the instrument. Therefore, a device capable of providing low-temperature circulating cooling water has become essential. In general, A low-temperature coolant circulation pump is used to cool or keep the equipment at a constant temperature.

 

 

1. Low-temperature cooling circulation pump and low-temperature constant temperature reaction bath (low-temperature constant-temperature bath) Difference: The low-temperature cooling liquid circulation pump can only cool and cannot be heated. The low-temperature constant-temperature reaction bath has a heating function in addition to low temperature.

 

2. The difference between the low temperature cooling liquid circulation pump and the general Xinye water bath: the general water bath does not have low temperature, only the heating function, and does not have the function of drawing liquid out for circulation.

 

3. The difference between a low-temperature coolant circulation pump and a Xinyu freeze dryer: A freeze dryer uses a cold trap to cool a fixed space environment. It works much like the cooling principle of a Xinye cryogenic refrigerator. The heat is removed by the continuous circulation of the cooling liquid, and the temperature is reduced by the compressor refrigeration to reduce the temperature.
 

 

 

How to choose a low-temperature coolant circulation pump? First of all, the temperature range to be used must be determined. The temperature required for different tests is different. The lower the required temperature, the more expensive it is. The second is to determine the volume of the cooling liquid. The more coolant there is, the larger the amount of cooling will be, and the more expensive it will be; the last thing is to see if the environment in which the cooling water pump is used is corrosive? If there is, use stainless steel shell, if not, use engineering plastics.

 

Some specifications of low-temperature coolant circulation pumps do not have a bath that can be directly placed in liquid cooling, only external circulation cooling. And some specifications are either a bath that can be directly placed in the cooling liquid cooling or an external circulation cooling. The larger volume with the bath function and the smaller volume without the bath are like the size of a computer mainframe. Customers should also pay attention when purchasing.

 

Generally speaking, the lower the temperature of the low-temperature coolant circulation pump, the more expensive it is, and the larger the volume, the more expensive it is. If you choose a stainless steel casing, the price will be more expensive; otherwise, the price will be relatively cheap;

 

 

Cryogenic cooling is also commonly used in circulating pumps: water, brine, and alcohol. Water can be used at 5 degrees; saltwater can be used if -5 degrees can be achieved; alcohol can only be used if the required temperature is lower, because the freezing point of alcohol can be as low as -117.3 degrees, so This can be done above the freezing point of alcohol.

Low-temperature chiller is often used with our company's glass reactor, short path distillation kit, and rotary evaporator.