As a precision equipment, liquid nitrogen tanks may encounter some minor issues during use. Mastering some basic troubleshooting methods can help you quickly solve problems and avoid affecting experimental or production progress. Here are some common faults and their solutions:

1、 Liquid nitrogen evaporates too quickly
Possible reasons:

Vacuum degree decreases (interlayer vacuum failure).

The tank is not tightly sealed (the lid is not tightened or the sealing ring is aging).

High ambient temperature or direct sunlight.

resolvent:

Check whether the tank body is bumped or deformed, and if necessary, contact the manufacturer to test the vacuum degree.

Tighten the lid or replace the sealing ring.

Move the liquid nitrogen tank to a cool and ventilated place to avoid high temperature environments.

2、 Severe frosting on the outer wall of the tank
Possible reasons:

The decrease in vacuum degree leads to a decrease in insulation performance.

Overfilling of liquid nitrogen resulted in frosting on the neck.

resolvent:

Contact the manufacturer to test the vacuum level and return to the factory for repair if necessary.

Control the liquid nitrogen filling amount to avoid exceeding 80% of the tank capacity.

3、 The lid cannot be opened or tightened
Possible reasons:

The sealing ring is deformed or aged, resulting in jamming.

Ice formation at the thread causes difficulty in rotation.

resolvent:

Replace the sealing ring with a new one.

Pour warm water around the lid to melt the ice layer before attempting to open it.

4、 There is abnormal noise inside the liquid nitrogen tank
Possible reasons:

There are foreign objects inside the tank (such as loose freezer racks).

Rapid evaporation of liquid nitrogen causes pressure changes.

resolvent:

Check and secure the contents of the tank to ensure stable placement.

If the abnormal noise persists, stop using and contact professional personnel for inspection.

5、 The liquid nitrogen tank cannot be filled with liquid nitrogen
Possible reasons:

The filling pipeline is blocked or frozen.

The pressure inside the tank is too high (the lid is not properly ventilated).

resolvent:

Check and clean the filling pipeline to ensure smooth flow.

Release the lid to release pressure, and then try filling again.

6、 Cryovial rupture
Possible reasons:

The quality of the cryovials is not qualified or the sealing is not tight, resulting in the infiltration of liquid nitrogen.

Improper operation during sample access resulted in damage to the cryovial.

resolvent:

Use high-quality cryovials and ensure good sealing.

Be gentle when accessing samples to avoid collisions.

reminder:
The above methods are suitable for solving simple faults. If the problem is complex or cannot be solved by oneself, please contact professional technicians immediately.

Regular maintenance of liquid nitrogen tanks can effectively extend their service life and reduce the occurrence of malfunctions.

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By mastering these tips, you can easily deal with common problems with liquid nitrogen tanks, ensure stable equipment operation, and safeguard your experiments and production!