Proper maintenance is essential to ensure the performance, safety, and longevity of a liquid nitrogen tank. Whether used in laboratories, medical storage, or industrial applications, a well-maintained tank guarantees stable insulation and safe cryogenic operation. This guide outlines the key practices for both daily inspection and long-term care.

1. Daily Inspection
Operators should begin each day with a quick check of the tank’s appearance and function. Look for any frost accumulation on the outer shell—this could signal vacuum loss. Check that the lid or neck plug is properly seated to prevent unnecessary evaporation. Additionally, inspect the liquid level using a measuring stick or electronic probe to ensure there is sufficient nitrogen for storage stability.

2. Weekly and Monthly Care
At least once a week, confirm that vent valves and pressure relief devices are functioning smoothly. For tanks with transfer hoses, inspect for frost buildup or cracks that could cause leaks. Monthly, clean the tank’s exterior with a dry, soft cloth—never with water—to prevent ice formation or corrosion.

3. Long-Term Maintenance
Every six months, perform a vacuum performance test if applicable, or check for signs of insulation degradation such as excessive nitrogen loss. Ensure that supporting accessories—like canisters, lifting handles, and bases—remain in good condition. For storage-type tanks, maintain a stable environment with good ventilation and minimal temperature fluctuation.

4. Professional Servicing
If the tank shows poor insulation or rapid nitrogen evaporation, contact professional technicians for vacuum re-pumping or sealing repair. Attempting self-repair can damage the inner structure.

Regular care not only extends the lifespan of your liquid nitrogen tank but also enhances safety and reliability, ensuring optimal protection for valuable biological or industrial samples.