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What is the use of a self-pressurizing liquid nitrogen tank that can only be used to hold liquid nitrogen?
It is mainly used for liquid nitrogen transfer.
Generally speaking, it is to fill other liquid nitrogen containers with liquid nitrogen, which is similar to the function of a liquid nitrogen pump, but the efficiency of a self-pressurizing liquid nitrogen tank is much higher than that of a liquid nitrogen pump!
It has a built-in pressurization system. This system does not open when it does not transport liquid nitrogen, so it is usually in a pressure-free state. Only when liquid nitrogen needs to be transported, the booster valve is opened to carry out liquid nitrogen transportation. At this time, it is in a low-pressure state.
However, you need to follow the prescribed steps when operating a self-pressurizing liquid nitrogen tank, otherwise danger may occur.
The specific operations are as follows:
1. Close the vent valve first to prevent the new pressure from being released;
2. Open the boosting valve and activate the boosting system, and the pressure in the tank will gradually increase;
3. Observe the pressure gauge and see the inner tank pressure data;
4. If the pressure gauge indicates ≥0.05MPa, the inlet and outlet valves can be opened to release liquid nitrogen; otherwise, the pressure gauge indicates