Precautions for the Use of Gas Chromatograph Carrier Gas
From the below picture, we can know that the gas from the gas chromatograph cylinder or gas generator passes through the pressure reducing valve, the piping system (including the flexible pipe or pigtail pipe), the pressure regulating valve and the regulating valve in sequence. Therefore, care must be taken when handling high-pressure gas cylinders:
1. In order to prevent the gas cylinder from falling, it should be tied with a chain or safety rope and stored against the wall.
2. In order to avoid the interference of gas flow rate, it is recommended to install a regulating valve between the gas cylinder and the spare gas cylinder, especially for the carrier gas, it is very important to install the regulating valve. For example, when the chromatographic column is heating up, insufficient carrier gas supply will be seriously damaged gas chromatography column. Use a secondary pressure reducing valve to adjust the gas pressure from the cylinder to the desired working pressure.
3. When replacing gas cylinders and installing pressure reducing valves, keep them as far away as possible.
4. The newly installed gas cylinder pressure reducing valve should be fully opened, especially within 24 hours of first use, in order to prevent the pressure drop inside the pressure reducing valve from causing pressure instability. Generally speaking, the cylinder needs to be replaced when the total pressure of the cylinder drops to 200-300 psi (or 10% of the initial pressure), because as the cylinder pressure drops, impurities such as moisture, hydrocarbons and small particles will concentrate in the gas Greatly reduces gas purity.
Changior is a branch company of Kejie Holding Group, in charge of the overseas marketing of Kejie products, providing to customers with mass spectrometry, chromatography, spectrum and other analytical scientifc instruments and professional services all around the world.
Welcome to vist our website: https://www.changior.com/ or contact us via email: sales@changior.com