saint vincent dewar 150L for LN2 self pressured KGSQ cryo storage tank

China [CN]

In life science research, liquid nitrogen is a commonly used freezing medium, and the container that stores it has become an important experimental tool. During the experiment, in order to stabilize the low-temperature storage environment of the sample, regular replenishment is required to ensure adequate supply. Because liquid nitrogen is volatile, the amount of liquid nitrogen decreases over time. Therefore, self-pressurizing liquid nitrogen tanks designed for liquid nitrogen supply are widely used and are very popular in scientific research institutions, laboratories, health industries and other places.

What is a self-pressurizing liquid nitrogen tank?

Answer: It is a liquid nitrogen supply equipment. It can also be called a pressurized liquid nitrogen tank!

Its principle of supplying liquid nitrogen is very simple, which is to use the evaporation of liquid nitrogen to generate pressure to realize the discharge of liquid nitrogen.

There is a valve on the top of its tank that controls the pressure increase. Only when a certain pressure is reached can the liquid discharge be realized. So, when the pressure reaches what level, can this function be realized?

When the pressure reaches ≥0.02MPa-<0.09MPa, liquid nitrogen can be discharged.

However, it should be noted that when the pressure of the self-pressurized liquid nitrogen tank reaches 0.02MPa, the pressure is too low. Although the liquid nitrogen can be discharged, the discharge speed is slow and intermittent and unstable;

When the pressure reaches 0.09MPa, the pressure is too high and the liquid nitrogen flow rate is fast. In order to avoid dangerous events, the safety valve will be triggered and the liquid discharge will be interrupted;

Therefore, the standard pressure given by the KGSQ liquid nitrogen tank manufacturer is 0.05MPa!

When the pressure of the liquid nitrogen supply tank reaches 0.05MPa, the liquid discharge speed is smooth and smooth, the liquid nitrogen flow rate is moderate, the safety valve will not be triggered, and excessive liquid nitrogen will not be wasted.

However, in order to avoid accidents, pay attention to the temperature and pressure of the liquid nitrogen during the pressurization process of the liquid nitrogen supply tank. At the same time, the sealing and safety of the tank must be checked regularly to ensure the normal use of the liquid nitrogen tank.