Liquid nitrogen supply tank, not only can rely on its own pressure to transport liquid nitrogen, as a supplemental tank for other liquid nitrogen containers, but also can be filled with liquid nitrogen by itself.
The difference is that the Liquid nitrogen supply tank needs to be pressurized to deliver liquid nitrogen at a pressure of about 0.05MPa when it is delivered to the outside, and no pressure is needed when it is filled to the inside.
The booster needs to pay attention to the opening of each valve and the adjustment of pressure, but what do you need to pay attention to when filling yourself?
Of course there is no shortage of valves to open and close!
1. Place the Liquid nitrogen supply tank in an open and flat area.
2. open the evacuation valve, close the booster valve, and open the inlet and outlet valves.
3. Reduce the value of the Liquid nitrogen supply tank pressure gauge to zero.
4. Injecting liquid nitrogen through the inlet and outlet valves.
5. Leave 10% of the total volume of the gas phase space, so that the liquid nitrogen volatile gas has room to exist and will not cause the tank pressure to rise.
In addition, note that filling the Liquid nitrogen supply tank should be strictly in accordance with the operating procedures, prepare the connector before refilling, do not touch the valve and container surface, and do not stand in the direction of the exhaust during the process of adding liquid nitrogen. Make sure the pipeline, gate valve, instrument panel, regulator and the inside of the gas delivery pipeline are clean so as not to cause contamination or residue easily.