Should the booster valve of the liquid nitrogen supply tank be kept open?

2024-04-22 09:54:00

Liquid nitrogen containers and liquid nitrogen, the combination of the two can give full play to the advantages of cryopreserved samples;

There is only liquid nitrogen, which will dissipate quickly and cannot be stored; there is only a container, and without the freezing medium, it is meaningless to use;

In addition, the low boiling point and easy volatilization properties of liquid nitrogen should be considered, and the liquid nitrogen tank should be replenished with liquid nitrogen regularly;

The first rehydration tool is a liquid nitrogen pump, and the second is a liquid nitrogen supply tank!

The former is suitable for small liquid nitrogen tanks, while the latter is a commonly used supplementary tank in laboratories. It is designed for large-volume liquid nitrogen tanks and is controlled by a booster valve to ensure stable delivery of liquid nitrogen at a low pressure within 0.1MPa. In addition, a vent valve + double safety valve are used to protect low pressure and prevent overpressure from causing safety problems.

So, regarding the question of whether the booster valve of the liquid nitrogen supply tank should be kept open?

The answer is: not really!

Whether the booster valve is open or not depends on the current state of the liquid nitrogen supply tank and what the container is being used for!

If it is only static storage without liquid nitrogen filling, there is no need to turn it on;

If you are filling other containers with liquid and the filling is not completed, you need to keep it open!

You should know that although the liquid nitrogen supply tank is a pressurized liquid nitrogen tank, it does not always need to be pressurized. Keeping the pressurization valve open = continuous pressurization. Even if it is a pressure vessel, it will not always maintain a pressure state. What’s more, the purpose of manufacturing a low-pressure container is actually to replenish liquid. The pressurization is only to replenish the container, not to keep the liquid nitrogen in a liquid state.

In this use, of course, the pressure increase can be stopped after the container is replenished, that is, the pressure increase valve is closed!

When storing liquid nitrogen daily, there is no need for rehydration, so there is no need to output liquid nitrogen pressure, and naturally there is no need to open a booster valve!

All in all, the boost valve of the liquid nitrogen supply tank does not need to be open all the time!

Should the booster valve of the liquid nitrogen supply tank be kept open