###### Abstract  
The main propose in this research work is to investigate the temperature and pressure increase resulting from the variable valve of a mass flow controller during the charging and discharging of helium gas, which is being used as an alternative to hydrogen gas in a vessel. In the operation of this experiment, the high-pressure gas stored in the main tank is first reduced to low pressure using an electronic solenoid valve within a regulator to control the flow rate. Subsequently, the flow rate is precisely measured using an MFC (Mass Flow Controller) and supplied to the experimental tank. Throughout this process, temperature and pressure sensors detect changes in physical behavior, collect data using LabVIEW cDAQ, and repeat the process of analyzing and verifying reliable data according to the experiment's conditions. The mass flow controller valve opening was set at 20%, 60%, and 100% while operating the LabVIEW programming. Also, this experiment was conducted at 20 \({}^{\circ}\)C ambient temperature and 0 bar gauge pressure. Both the temperature and pressure increase as the MFC valve opens further because the helium gas flow is accumulating during the valve opening time. Furthermore, in the case of helium temperature, it increases significantly when the gas is charged rapidly, compared to the pressure characteristics. Therefore, one can see that the vessel increases as the valve opening time increases, and the temperature changes; the temperature is more significant when the helium gas is charged rapidly during the valve opening time. J 2023 13 11348 11348 11348 11348 11348 11348 11348 11348 11348 11348 11348 11348 1348 11348 11348 11348 11348 11348 11348 11348 11348  
important factors to control and predict the reaction of helium gas, and are utilized in various experiments and designs in scientific and engineering applications [8]. The authors of this study decided to utilize helium gas because of the explosion risk associated with hydrogen. In other words, they deemed safety for the experiments to be of utmost importance. Additionally, although the chemical properties of hydrogen and helium are quite different, the study found that helium gas could be handled with a minimum level of safety concern [9]. In particular, helium is considered to have a very low or virtually nonexistent likelihood of exploding in most situations. Helium is a non-flammable gas, and it is extremely difficult to ignite or cause it to explode under normal conditions [10]. Due to this safety factor, helium is commonly used as a safe gas in many experiments and applications [11]. In contrast, hydrogen is a flammable gas that can ignite and pose an explosion risk when mixed with air [12]. Therefore, special precautions and safety measures are necessary when handling hydrogen. Due to the difference in flammability between helium and hydrogen, helium is generally considered to have a much lower risk of explosion compared to hydrogen [13]. However, even when using helium in experiments or applications, it is essential to adhere to relevant regulations and guidelines for safety [14]. Safety considerations that may arise when using helium should be taken into account based on the specific experiment environment and circumstances. Helium has a lower molecular weight than hydrogen, so it diffuses faster under the same conditions and is more sensitive to pressure changes. Therefore, helium gas reacts relatively more sensitively to pressure changes. Because hydrogen has a higher molecular weight, its diffusion rate is slower than helium under the same pressure conditions [15]. Therefore, hydrogen gas is relatively less sensitive to pressure changes than helium. Helium can change into a liquid at low to very cold temperatures [16]. These properties are one of the reasons why helium is primarily used in low-temperature experiments and applications. Helium's response to temperature changes is greater than that of other gases, and its relationship with pressure follows the ideal gas law [17].