Problem with no pressure display on the Dewar pressure gauge

When you find that no pressure display on Dewar pressure gauge, do you know the reasons? Do you know how to deal with it?

1.The pressure gauge is broken

Solution: Remove and replace the bad pressure gauge

2. The inner container rupture disc opens

Solution: Remove and replace the rupture disc, pressurize the container and check the operation of the pressure reducing valve

3. There is leakage in the valve or pipeline

Solution: Check for leaks and perform repairs, see maintenance chapter

4. The liquid is too cold

Solution: Open the boost circuit