Unlike sperm storage tanks that are often equipped with liquid nitrogen pumps for rehydration, the rehydration containers used in laboratories are mostly liquid nitrogen supply tanks.
It replenishes fluids faster than a liquid nitrogen pump, and does not require plugging in or stepping on your feet. It has its own liquid storage tank and automatically outputs liquid nitrogen after being pressurized by its own system. Therefore, its pressurization is not like a liquid nitrogen pump that relies on external force, but the liquid nitrogen inside the liquid storage tank evaporates to a certain pressure to achieve liquid nitrogen output. Keep outputting and maintain pressure!
Therefore, when the liquid nitrogen supply tank first stops, there is still pressure in the liquid storage tank!
How to deflate it?
Use a bleed valve – a bleed valve!
On the top of the liquid nitrogen supply tank, there are three valves in the handrail: a boost valve, a vent valve, and a liquid inlet and outlet valve. The vent valve is a pressure relief valve. Opening it is equivalent to opening an outlet for the volatilized nitrogen, allowing the gas to escape without accumulating energy pressure in the tank. It can also drain the remaining liquid in the pipeline to avoid knotting in the pipeline. Ice, causing ice blockage.
If it is not deflated, the residual nitrogen will return to the inner tank, press the lower part of the liquid nitrogen, and accelerate the volatilization. In addition, the liquid in the liquid nitrogen supply tank will naturally volatilize. Over time, the pressure will increase. When it exceeds 0.09MPa, the safety valve will be automatically triggered. , forced exhaust and pressure relief.
In order to ensure safe use and extend the service life of the tank, it is recommended to always open the vent valve of the liquid nitrogen supply tank to deflate when not in use!