Safety valves are the core safety components of cryogenic storage tanks, including liquid nitrogen, liquid oxygen, liquid argon and food-grade CO2 tanks. Serving as the final pressure protection barrier。

Safety valves are the core safety components of cryogenic storage tanks, including liquid nitrogen, liquid oxygen, liquid argon and food-grade CO2 tanks. Serving as the final pressure protection barrier, they automatically release excess pressure to prevent tank overpressure and leakage. Many industrial factories only conduct regular valve calibration but ignore the replacement cycle, leading to valve sticking, seal failure and potential safety hazards in long-term operation.

During daily operation, tank pressure continuously rises due to medium evaporation, temperature changes and liquid filling. Qualified cryogenic tank safety valves will open and release pressure once exceeding the rated pressure value. Aged valves with worn seals or fatigued internal springs fail to respond properly under overpressure conditions, which may cause gas leakage, tank deformation and even serious safety accidents.

In accordance with international industrial safety standards, cryogenic tank safety valves require annual professional calibration. The standard overall replacement cycle is 3 to 5 years. For harsh working environments with high humidity and corrosion, such as chemical and food processing plants, valves suffer faster wear and tear, so a 3-year replacement cycle is highly recommended. Many enterprises mistakenly believe that qualified calibration means continuous usability, ignoring hidden aging problems that may cause sudden valve failure.

Immediate replacement is required in the following situations: repeated calibration failures, valve body corrosion, failure to reset after pressure relief, frequent abnormal popping, and service life exceeding 5 years with obvious internal component aging.

Safety valve replacement follows strict industrial specifications, and universal valves are not allowed. Users must select dedicated valves matching the tank medium: oil-free safety valves for liquid oxygen tanks and customized models for liquid nitrogen and CO2 tanks. All parameters including set pressure and caliber must fully match the original tank specifications. Before replacement, residual tank pressure must be completely discharged. After installation, on-site pressure testing and calibration are mandatory, with formal test reports reserved for safety inspection.

Low-quality generic valves with mismatched parameters may cause hidden risks despite lower upfront costs. Regular replacement of standard industrial safety valves is the most cost-effective way to ensure compliant and safe factory operation.

We provide full-range dedicated cryogenic tank safety valves and one-stop services including on-site disassembly, replacement, calibration and regular inspection. Our products fit liquid nitrogen, liquid oxygen, liquid argon and food-grade carbon dioxide tanks, helping global factories achieve standardized and safe gas storage operation.