Tianchi liquid nitrogen container can only use the matching neck plug to close the tank mouth. It can't be replaced by other plugs. It can't use sealed plugs to avoid the continuous evaporation of liquid nitrogen and the damage of the container caused by the increase of nitrogen pressure.
Material: Liquid nitrogen container neck plug is made of polyurethane with good heat insulation. It is used to block the tank mouth to reduce liquid nitrogen evaporation. There are a plurality of different grooves on the neck plug (containers with different volumes and different calibers, and different numbers of slots) for fixing the lifting cylinder.