Precautions during use of liquid nitrogen tank:
1. Due to the large heat of the liquid nitrogen tank, the thermal equilibrium time is longer when the liquid nitrogen is first filled, it can be filled with a small amount of liquid nitrogen to pre-cool (about 60L), and then slowly filled (so that it is not easy to form ice Blocking).
2. In order to reduce the loss when filling liquid nitrogen in the future, please refill liquid nitrogen when there is still a small amount of liquid nitrogen in the liquid nitrogen tank. Or fill with liquid nitrogen within 48 hours after using up the liquid nitrogen.
3. To ensure the safety and reliability of the liquid nitrogen tank, the liquid nitrogen tank can only be filled with liquid nitrogen, liquid oxygen, and liquid argon.
4. Water or frost on the outer surface of the liquid nitrogen tank during infusion is a normal phenomenon. When the booster valve of the liquid nitrogen tank is opened for boosting work, since the booster coil is attached to the inner wall of the outer cylinder of the liquid nitrogen tank, the liquid nitrogen will absorb the outside when the liquid nitrogen passes through the coil of the liquid nitrogen tank. The heat of the cylinder is vaporized to achieve the purpose of boosting pressure, and there may be spot-like frost on the outer cylinder of the liquid nitrogen tank. After closing the booster valve of the liquid nitrogen tank, the frost spots will slowly dissipate. When the booster valve of the liquid nitrogen tank is closed and no infusion work is performed, there is water and frost on the outer surface of the liquid nitrogen tank, which indicates that the vacuum of the liquid nitrogen tank has been broken, and the liquid nitrogen tank cannot be used anymore. It should be repaired or scrapped by the manufacturer of the liquid nitrogen tank**.
5. When transporting liquid nitrogen media on roads with grade 3 or below, the speed of the car should not exceed 30km/h.
6. The vacuum nozzle on the liquid nitrogen tank, the seal of the safety valve, and the lead seal cannot be damaged.
7. If the liquid nitrogen tank is not used for a long time, please drain the liquid nitrogen medium inside the liquid nitrogen tank and blow it dry, then close all the valves and seal it.
8. Before the liquid nitrogen tank is filled with liquid nitrogen medium, dry air must be used to dry the container liner and all valves and pipes before it can be filled with liquid nitrogen medium, otherwise it will cause the pipeline to freeze and block, which will affect the pressure increase and infusion. .
9. The liquid nitrogen tank belongs to the instrument and meter category. It should be handled with care when using it. When opening the valves of the liquid nitrogen tank, the force should be moderate, not too strong, and the speed should not be too fast; especially the metal hose of the liquid nitrogen tank When connecting the joint at the drain valve, do not overtighten it with strong force. It is enough to screw it in place with a little force (the ball head structure is easy to seal), so as not to twist the liquid nitrogen tank nozzle or even twist it off. Hold the liquid nitrogen tank with one hand.
Post time: Aug-31-2021
