Gas tank filling: Inflation should be performed from top to bottom, transitioning from high pressure to low pressure. It is recommended to chill the gas tank in a refrigerator for 30 minutes prior to inflation. Warning: Inflation must only be conducted by trained professionals and in compliance with applicable national safety regulations. Do not inflate MAPP gas or liquefied petroleum gas into flat gas tanks or cassette gas tanks. Inflation must be carried out in a well-ventilated outdoor area. Pressure release button: During inflation, non-gaseous components may accumulate at the upper part of the gas tank and can be released using the pressure release button (press for approximately 2 seconds before starting inflation). Note: Ensure the air valve is closed when releasing pressure, and confirm the device is properly installed in the correct direction. This valve allows gas from multiple flat gas tanks to be transferred into a single tank for reuse. The valve is compatible with cassette converters and similar adapters, enabling gas transfer between tanks regardless of orientation, with flexible connectivity options. The switch core is made of 58 copper for durability. The gas seal uses fluoroplastic O-rings resistant to wear, chemicals, and extreme temperatures, functioning reliably within a range of -20°C to 250°C. Features a double O-ring sealing design—one for primary sealing and one to prevent leakage. Gas cylinders may vary in type, but different gases must not be mixed. Always use the same type of gas. Residual gas collection tanks should not be filled to full capacity, and new gas bottles are not intended to be filled to 100%. Two effective methods are available: First method: A simple and practical approach—chill both the source tank and receiving tank in the refrigerator for 20 minutes without depressurizing, then proceed immediately with inflation.