Chat Dewar bottle MC450MP MCR liquid nitrogen tank
Instructions for using the four Chater Dewar flasks

A、 Using Gas
Connect the gas pipeline to the joint of the gas usage valve, and use two wrenches to tighten the joint to prevent loosening and air leakage.

2. Open the pressure increasing valve of the Dewar flask and place it in automatic pressure regulation mode.

Open the gas usage valve and start supplying gas to the gas consuming equipment.

If not used for a long time, close the gas usage valve and pressure boosting valve to avoid waste.

After use, close all valves on the Dewar flask to prevent air and its impurities from entering the flask and causing contamination.

6. Remove the pipeline connected to the gas use valve. When loosening the pipeline, it is necessary to ensure that the gas in the pipeline has been emptied, and use two wrenches to prevent loosening the joint, which may cause air leakage.


B、 Liquid usage
Connect the liquid pipeline to the joint of the liquid valve, and use two wrenches to tighten the joint to prevent loosening and air leakage.

2. Open the pressure increasing valve of the Dewar flask and put it in automatic pressure regulation mode. However, for users who use low-pressure tanks or take liquid nitrogen for freezing, the pressure increasing valve can be opened and closed according to the speed of liquid nitrogen extraction to choose the appropriate pressure, but generally the pressure should not exceed 0.2Mpa.
Slowly start the liquid valve and start taking the liquid.
If not in use, close the liquid valve and booster valve to avoid waste.
After use, close all valves on the Dewar flask to prevent air and its impurities from entering the flask and causing contamination.
6. Remove the pipeline connected to the liquid valve. When loosening the pipeline, it is necessary to ensure that the gas inside the pipeline has been emptied, and use two wrenches to prevent loosening the joint, which may cause air leakage at the joint.


Five safety points for storage and use
The storage and use area must maintain sufficient ventilation to prevent nitrogen and argon gas leakage or discharge, which may cause hypoxia and suffocation; Prevent oxygen leakage or discharge, which can lead to the formation of oxygen enrichment and easily cause surrounding substances to catch fire.
-Storage and use areas must be kept away from sources of fire, heat, and corrosive substances.
When using liquids, it is necessary to wear leather gloves or insulated gloves to operate low-temperature components and keep them dry to prevent frostbite of the skin on the hands.
When taking liquid nitrogen from a Dewar flask for freezing, it is necessary to wear a face mask to prevent liquid nitrogen from flying and freezing the facial skin and eyes.
4. Components such as pipelines, joints, and sealing materials used in oxygen must not contain grease and must be compatible with oxygen.
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