1, temperature method:
Increasing the temperature of the gas in the gas generator system can temporarily increase its pressure so that all the air can escape (bubbles can be observed at the liquid). When the temperature returns to the initial temperature, the overall pressure decreases, which leads to the back suction of a water column in the submerged airway.
2, liquid level difference method:
Clamp the rubber conduit with an air trap, add water to the long-necked funnel to immerse its lower end in water, and continue to add water to form a section of water column, resulting in a height difference, and the water column will not fall back for a period of time, indicating good air tightness.
Principles of air tightness inspection:
Let the device and additional liquid (usually water) form a closed whole, and change the temperature of the whole, which will lead to the change of pressure to judge whether the air tightness is good or not. Due to different equipment, the inspection methods are different. A test method for pressurized compressed air (or ammonia, freon, helium, halogen gas, etc.). ) is injected into the container, and whether there is leakage is checked by using the pressure difference between the gas inside and outside the container.
Air tightness tester brand:
1、ATEQ:
ATEQ is a French manufacturer of air tightness detector, belonging to the first batch of testing manufacturers. In 2007, he entered China and started his business. Its main customers are concentrated in the automobile industry. The company has air tightness detector, flow detector, micro-flow detector, hydrogen and nitrogen detector, tire pressure detector and other products. See their China official website for details.
2、CTS:
CTS is a subsidiary of Tass Group in the United States, and it is also one of the manufacturers that opened a branch in China earlier. Entered China in 2009. At first, I was the agent of a company in Shenzhen. After the market, opened a branch in Shanghai.
The main products are air tightness detector, flow detector, quick connector and calibration service. For details, please refer to official website, a trading company in China District.