Product Category
Dewar flasks Precautions
Date: Jul 28, 2020
The external structure of the Dewar tank: Generally, the Dewar tank has four valves, and the pipes where the valves are located are marked in English. LIQULD is the valve for liquid use, USE (GAS USE) is the valve for gas use, VENT is the vent valve, and PB (PRESSUREBUILD UP) is the booster valve. According to experience, a few gas cylinders do not have gas service valves. In addition, there are gas pressure gauges and level gauges.
Use: If you are using a Dewar liquid phase. Therefore, the first step is to use a high-pressure metal hose to connect the pipe where the liquid valve of the Dewar tank is located with the evaporator. After confirming the connection, the liquid valve can be opened. If the gas pressure to the workshop does not meet the requirements for use, please open Pressurize the valve, wait a few minutes, the pressure will rise and meet the requirements of use. Ready to use. When the Dewar tank has no liquid phase and the gas phase pressure is only 5kg, it means that the gas in the pressure vessel has been used up. Please close the liquid use valve and stop using it.
The use and storage need to pay attention to the problems: Compared with the gas supply of steel cylinders, Dewar tank gas supply has the advantages of large storage capacity, high gas purity, convenient transportation, high safety, and economical benefits. So now it is very common for customers to use Dewar. Here is an introduction to the matters needing attention during the use of the Dewar, so that users who are new to contact can understand and master.
1. The minimum temperature of the gas (liquid nitrogen, liquid oxygen, liquid argon or liquid carbon dioxide) contained in the Dewar can be minus 196 degrees. Therefore, avoid direct contact with the liquid gas on the skin during use to prevent frostbite.
2. When the pressure of the gas in the Dewar tank is too high, it will release the pressure to the outside and discharge the gas. Therefore, keep the storage area ventilated to avoid suffocation caused by high gas concentration.
3. The Dewar tank should be placed upright during use and transportation to avoid tilting. Prevent liquid from being discharged from the safety valve, causing frostbite and damage to the Dewar.
4. During the use of the pressure vessel, the force should not be excessive when opening and closing the valve. When the valve and pipeline freeze due to the large amount of gas used, they must be drenched with water before being broken, and must not be broken violently.
Use: If you are using a Dewar liquid phase. Therefore, the first step is to use a high-pressure metal hose to connect the pipe where the liquid valve of the Dewar tank is located with the evaporator. After confirming the connection, the liquid valve can be opened. If the gas pressure to the workshop does not meet the requirements for use, please open Pressurize the valve, wait a few minutes, the pressure will rise and meet the requirements of use. Ready to use. When the Dewar tank has no liquid phase and the gas phase pressure is only 5kg, it means that the gas in the pressure vessel has been used up. Please close the liquid use valve and stop using it.
The use and storage need to pay attention to the problems: Compared with the gas supply of steel cylinders, Dewar tank gas supply has the advantages of large storage capacity, high gas purity, convenient transportation, high safety, and economical benefits. So now it is very common for customers to use Dewar. Here is an introduction to the matters needing attention during the use of the Dewar, so that users who are new to contact can understand and master.
2. When the pressure of the gas in the Dewar tank is too high, it will release the pressure to the outside and discharge the gas. Therefore, keep the storage area ventilated to avoid suffocation caused by high gas concentration.
3. The Dewar tank should be placed upright during use and transportation to avoid tilting. Prevent liquid from being discharged from the safety valve, causing frostbite and damage to the Dewar.
4. During the use of the pressure vessel, the force should not be excessive when opening and closing the valve. When the valve and pipeline freeze due to the large amount of gas used, they must be drenched with water before being broken, and must not be broken violently.
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