1. Liquid nitrogen is an ultra-low temperature liquid (-196°C). If it splashes on the skin, it will cause frostbite similar to a burn. Therefore, special attention should be paid when filling and taking out liquid nitrogen;
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2. Since the liquid nitrogen tank has a large amount of heat, the first time it is filled with liquid, the heat equilibrium time will be longer. A small amount of liquid medium can be filled first to pre-cool (about 20L), and then slowly filled (this way it will not It is easy to form ice blockage.
3. When not in use for a long time, be sure to open the vent valve to prevent the valve from being closed for a long time and causing the nitrogen pressure to increase and cause damage to the container;
4. Long-term storage of liquids Nitrogen-containing rooms should open windows for ventilation.
5. Self-pressurized liquid nitrogen tanks are mainly used to transport and store liquid media, and can also be used as a cold source for other refrigeration devices. The container consists of an inner tank and It consists of a shell and an instrument valve. There is a pressure gauge on the upper part, which can easily observe the pressure in the tank. It is equipped with a safety valve to improve the safety of the container.
6. In order to reduce the loss during future filling, please contact us. Refill the liquid nitrogen tank when there is still a small amount of liquid in it, or refill it within 48 hours after using up the liquid. 7. To ensure the safety and reliability of the liquid nitrogen tank, this container must be refilled. It can only be filled with liquid nitrogen.
8. During infusion, water and frost will form on the outer surface of the liquid nitrogen tank, which is a normal phenomenon. The tube is attached to the inner wall of the outer cylinder. When the liquid passes through the coil, it will absorb the heat of the outer cylinder and vaporize to achieve the purpose of boosting the pressure. There may be spots of frost on the outer cylinder. Close the boost valve. Afterwards, the frost spots will slowly dissipate. When the booster valve is closed and no infusion is performed, there is water and frost on the outer surface of the container, which indicates that the vacuum of the container has been destroyed and the container cannot be used anymore. Contact a professional manufacturer for repair or scrapping.
9. If the liquid nitrogen tank is not used for a long time, please drain and dry the liquid medium inside the tank, then close all valves and seal the liquid nitrogen tank before filling. Before filling the liquid medium, the container liner and all valves and pipes must be blown dry with dry air, otherwise the pipes will freeze and block, affecting pressure increase and infusion.
10. This equipment belongs to the instrument category. It should be handled with care when using it. When opening each valve, the force should be moderate but not too large, and the speed should not be too fast; especially when connecting the metal hose to the joint at the inlet/discharge valve. , do not overtighten with force, just tighten it with a little force until it can seal, so as to avoid twisting the pipe at an angle or even breaking it. Hold the valve body with one hand when tightening.