Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Economic and Technological Development Zone, Heze City. With a registered capital of 50 million yuan and total assets of 500 million yuan, the company has seven business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineers and technicians, and 82 intermediate-level technicians. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was identified as a "Specialized and New Enterprise in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Low-temperature liquid oxygen storage tanks typically require certain safety accessories to ensure safe operation and to address potential risks. The following are some common safety accessories for low-temperature liquid oxygen storage tanks:
Pressure Sensor: Used to monitor pressure changes within storage tanks. If the pressure exceeds the set range, it will trigger an alarm or automatically stop filling measures to prevent overpressure in the tank.
Safety Valve: Used to automatically release gas when the pressure inside the storage tank exceeds the set value, preventing overpressure. The safety valve should be selected and installed based on the design pressure and capacity of the storage tank.
Pressure relief device: Used to release gas to a safe area when the pressure inside a storage tank is too high, thereby reducing the pressure on the tank. Pressure relief devices typically include pressure relief valves, relief pipes, etc.
Level sensor: Used to monitor the level changes of liquid oxygen inside storage tanks to ensure an adequate supply and prevent overfilling.
Temperature Sensor: Used to monitor temperature changes within storage tanks to ensure the temperature of liquid oxygen inside the tank remains within a safe range.
Fire Detectors and Fire Suppression Systems: Designed to monitor fire risks around storage tanks and activate fire suppression systems as needed to prevent the spread of fire to other areas.

Prior to using the liquid oxygen tank, the following preparations must be made:
Safety Inspection: Ensure the tank and its surrounding environment are safe. Check for any damage, leaks, or other potential hazards. Confirm that there are no flammable materials or other hazardous items in the vicinity of the tank.
Tank Preparation: Inspect the tank's exterior, including the shell, welds, valves, and fittings. Ensure there are no obvious damages or corrosion. Check that the insulating layer of the tank is intact and undamaged.
Liquid Oxygen Filling: Utilize liquid oxygen transfer equipment to fill the storage tank. Ensure the flow rate and pressure of liquid oxygen are maintained within a safe range during the filling process.
Pressure Control: Storage tanks should be equipped with pressure control devices to ensure the internal pressure of the tank remains within a safe range. Inspect and adjust the pressure control devices to ensure proper functioning.
Valve Operation: Inspect the tank valves and connections for proper functioning. Ensure the valves open and close smoothly and reliably. Adjust the valve's open and close status as required.
Safety Equipment: Inspect the safety equipment around the storage tank, such as fire separation zones and alarm systems, to ensure they are functioning properly.
Operator Training: Ensure operators are proficient in the safe operation of liquid oxygen tanks.

The installation of the safety valve for liquid oxygen storage tanks is a crucial component to ensure that the tank can release pressure in a timely manner during overpressure situations, protecting the tank and related equipment. Below are the steps for installing the safety valve for the liquid oxygen storage tank:
Determine the rated pressure of the safety valve: Based on the design pressure and flow requirements of the liquid oxygen storage tank, select an appropriate safety valve. Ensure the rated pressure of the safety valve meets the tank's requirements and complies with relevant safety standards and regulations.
Valve Installation Location: Choose an appropriate location for installing the safety valve. Typically, the safety valve should be mounted on the top or side of the liquid oxygen storage tank to ensure timely pressure release in case of overpressure situations.
Preparation for installation interfaces: Prepare the appropriate interfaces based on the connection method of the safety valve. This may include welding interfaces, threaded interfaces, or flange interfaces, etc. Ensure the tightness and firmness of the connections.
Install the safety valve: Mount the safety valve onto the prepared interface. Follow the installation instructions for the safety valve to ensure it is properly connected and secured.
Adjustment and Testing: After installation, adjust and test according to the requirements of the safety valve. Ensure that the opening and closing pressures of the safety valve meet the design specifications, and conduct a leakage test to ensure its sealing.
Connect discharge pipes: The discharge pipes of the safety valve should be properly connected to the outlet of the safety valve. The discharge pipes must have sufficient diameter and flow capacity to ensure effective discharge of overpressure gas when the safety valve is activated.
Identification and Record: Label the safety valve and discharge pipeline with relevant information such as rated pressure, flow rate, and installation date. Additionally, record the installation details and test results of the safety valve for future reference and maintenance.
When installing the safety valve on the liquid oxygen storage tank, it is imperative to adhere to the relevant safety regulations and operating guidelines. If you lack the necessary experience and knowledge, it is recommended to seek assistance and guidance from a professional to ensure the correct installation and reliable operation of the safety valve.

Liquid nitrogen cylinders are widely used in various industries, primarily in the following aspects:
Industry: Liquid nitrogen tanks are used for storing and supplying liquid nitrogen, which is essential for cryogenic preservation of biological samples, cells, tissues, and vaccines. They are widely employed in biopharmaceutical research institutions and biobanks, among other facilities.
Experimental Research: Liquid nitrogen tanks are used in scientific research and laboratories to provide low-temperature environments for cryopreservation and frozen experiments. Liquid nitrogen tanks play a crucial role in experimental research across various fields, including physics, chemistry, biology, and materials science.
Metalworking Industry: Liquid nitrogen tanks are used in the metalworking and welding industries for providing low-temperature cooling, for processes such as metal cutting, welding, and heat treatment. Liquid nitrogen tanks can provide low temperatures, enabling metals to achieve the required hardness and toughness during the processing.
Food Industry: Liquid nitrogen tanks are used in the food industry for freezing and refrigerating food items such as frozen meats, frozen fruits, and frozen seafood. The low temperature of liquid nitrogen can quickly freeze the food, preserving its freshness and quality.
Semiconductor Industry: Liquid nitrogen tanks are used in semiconductor manufacturing and the electronics industry to provide low-temperature environments, for the freezing and preparation of semiconductor materials. The low temperature of liquid nitrogen can enhance the purity and performance of semiconductor materials.
The configuration of liquid nitrogen tanks typically includes the following aspects:
Vessel Structure: Liquid nitrogen tanks typically feature a double or multi-layered design, filled with insulating material in between to minimize heat transfer and evaporation of the liquid nitrogen. The vessel material is usually stainless steel or aluminum alloy, offering excellent corrosion resistance and low-temperature performance.
Insulation Layer: The insulation layer of liquid nitrogen tanks usually consists of multi-layer insulation materials, such as polyethylene foam, glass fiber, and vacuum layers, to minimize heat transfer and evaporation of liquid nitrogen.
Thermal Control System: Liquid nitrogen tanks are typically equipped with a thermal control system, used to regulate the tank's temperature to maintain the liquid's integrity.
Zhong Jie Special Equipment upholds the grand vision of "realizing the dreams of employees, creating value for customers, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We offer society products and services with high performance and cost-effectiveness!