Purchase knowledge of cryogenic cooling circulation pumps

Researchers who do research work know that in the laboratory experiment, it is often necessary to use cooling and cryogenic liquids to cool down or thermostat instruments. Therefore, it is essential to provide a device for low-temperature circulating cooling water. The device is cooled or thermostated with a low temperature coolant circulation pump.

The difference between similar products:

1. The difference between the low temperature cooling circulation pump and the low temperature constant temperature reaction bath (low temperature constant temperature bath): the low temperature coolant circulation pump can only be cooled and cannot be heated, and the low temperature constant temperature reaction bath has heating function in addition to low temperature.

2. The difference between the low temperature coolant circulation pump and the universal water bath: the universal water bath does not have a low temperature, only the heating function, and the liquid is not taken out for circulation, and the low temperature cooling circulation pump can be used for low temperature.

3. The difference between the low temperature coolant circulating pump and the freeze dryer: the freeze dryer uses a cold trap to cool the fixed space environment, and the working principle of the low temperature refrigerator is similar, while the low temperature coolant circulation pump is through the cooling liquid. Continuous circulation to take away the heat, and then reduce the temperature by compressor cooling to achieve cooling.

Points to note when purchasing a cryogenic coolant circulation pump:

How to choose a low temperature coolant circulation pump? First of all, we must first determine the temperature range used. The temperature required for different test requirements is different. The lower the required temperature, the more expensive the price. The second is to determine the volume of the coolant. The larger the volume of the coolant, the larger the volume. The more the coolant, the greater the amount of cooling, and the price is very expensive; the last is to see if the environment used by the cooling pump is corrosive? If it is necessary to use a stainless steel casing, if you do not use engineering plastics.

Some manufacturers of cryogenic coolant circulation pumps do not have to be placed directly into the liquid cooling bath, only external circulation cooling. Some manufacturers produce both a bath that can be directly placed in the cooling of the coolant, and an external circulation cooling. The large size with the bath function, the small size without the bath, just like the size of the main computer box, customers should also pay attention when purchasing.

In general, the lower the temperature of the low-temperature coolant circulating pump, the more expensive it is. The larger the volume, the more expensive the price is. The price of the stainless steel casing is expensive, and the price is relatively cheaper. Therefore, be sure to pay attention when purchasing.

Coolant purchase and features:

Low-temperature cooling is also commonly used in circulating pumps: water, brine and alcohol. It is ok to use water at 0 degrees; if you want to use -5 degrees, you can use salt water; if the required temperature is lower, you can only use alcohol, because the freezing point of alcohol is very low to -117.3 degrees, so Temperatures above the freezing point of alcohol can be achieved. The structure of the low-temperature coolant circulating pump is also relatively simple. It has been debugged at the factory, so it can be used directly according to the instructions.