What are the standard configuration of 50L self pressurized liquid nitrogen tank

What is the standard configuration of 50L self pressurized liquid nitrogen tank? Details are as follows:

1. 1 stainless steel low-temperature drain pipe (black insulation material can be selected to wrap the drain pipe, it is not cold to touch, and frost can not be seen from the surface of the pipe, so it is recommended to use it frequently);

2. One booster valve;

3. One drain valve;

4. One vent valve;

5. One pressure gauge;

6. 2 safety valves;

7. Four castors;

8. Optional float level gauge or electronic level gauge.