Industrial-Grade Self-Pressurizing LN₂ Tank: Stability Test Report After 100 Hours of Continuous Operation

Self-pressurizing liquid nitrogen (LN₂) tanks are essential in automated cryogenic systems, such as biological storage, metal treatment, and semiconductor cooling. To validate the performance and reliability of industrial-grade models, a 100-hour continuous operation test was conducted on a standard 50L self-pressurizing LN₂ tank under simulated industrial conditions.

1. Test Setup and Parameters

The tank was operated in a controlled environment, configured to dispense LN₂ continuously through an automated valve system at a steady rate. The test monitored:

• Internal pressure stability

• Flow rate consistency

• Vacuum integrity

• Evaporation loss rate

• Component performance (valves, gauges, pressure-building coil)

Ambient temperature: 25°C ±2°C
Initial LN₂ volume: 90% full
Pressure range target: 0.08–0.1 MPa

2. Key Findings

• Pressure Stability: The internal pressure remained consistently within the desired range, with only ±3% fluctuation.

• Continuous Flow Performance: Flow rate was stable throughout the test, without clogging or freezing.

• Evaporation Rate: The evaporation loss remained below 0.8% per day, well within the industry standard.

• Vacuum Performance: No signs of vacuum degradation (e.g., surface frost) were detected.

• Component Integrity: All valves, hoses, and regulators functioned without leaks or wear.

3. Conclusion

The industrial-grade self-pressurizing LN₂ tank demonstrated excellent thermal insulation, pressure control, and mechanical reliability over 100 hours of non-stop operation. This makes it a dependable choice for demanding environments requiring uninterrupted cryogenic supply.