When used for rehydration, both the container and the tool need to provide assistance before the liquid can be squeezed out. This is true for the liquid nitrogen pump, and the same is true for the liquid nitrogen supply tank. The difference is that the pump relies on manpower or electricity, while the supply tank only uses liquid nitrogen to reach a certain pressure value!
When using this kind of container that relies on pressure for infusion, users will have concerns about safety. The reason why the liquid nitrogen supply tank is recognized by laboratory users is that it has low pressure and safety protection. It has double safety valves that automatically shut down when overpressure occurs. Pressure relief protection!
When the pressure ≥0.09MPa!
The liquid nitrogen supply tank is an unpressurized liquid nitrogen storage tank manufactured in accordance with the GB/T 16774-2012 standard. It is made of 304 stainless steel and can only store liquid nitrogen. Moreover, the standard stipulates that the working pressure cannot exceed 0.1MPa. The working pressure is the pressure value that increases when liquid nitrogen is transported. If it is not manufactured according to this regulation, it cannot be called a self-pressurizing liquid nitrogen tank, that is, a liquid nitrogen supply tank.
Therefore, the manufacturer has already limited the pressure in the early design, and the critical pressure value of the liquid nitrogen supply tank is ≥0.09MPa. During pressurized infusion, if the pressurized valve is opened too large and the pressure is ≥0.09MPa, the safety valve will automatically start and turn on the over-pressure protection. The protection method is automatic pressure relief. During the pressure relief period, there will be a squeaking sound. Exhaust sound.
If you find that your self-pressurized liquid nitrogen supply tank makes an inexplicable exhaust sound during use, it means that you have overpressured it. Pay attention to the pressure adjustment and stop the pressure increase, otherwise it may cause a dangerous incident!