Diagnosing the leakage of the air valve body is a meticulous and important process, involving inspections and judgments in many aspects.
First, the presence of a leak can be preliminarily determined by observing the abnormalities of the air valve body and its surroundings. When the air valve body leaks, it is usually accompanied by a hissing or hissing sound, which can be amplified and located with the help of tools such as a stethoscope. In addition, the leak may also cause the temperature of the air valve body's surrounding environment to change, such as the intake temperature rises when the intake valve leaks, and the outlet temperature rises when the exhaust valve leaks. These temperature changes can be detected by touch or professional temperature measuring instruments.
Secondly, pressure detection is an effective means of diagnosing the leakage of the air valve body. When the air valve body leaks, the pressure in the front section will rise, while the outlet pressure will drop. By installing a pressure gauge or pressure sensor, the pressure changes before and after the air valve body can be monitored in real time to determine whether there is a leak. At the same time, the pressure drop method can also be used to diagnose the leak by pressurizing the air valve body and observing the pressure changes.
In addition, leak detection using special tracer substances is also a common method. The air valve body can be filled with a leak-indicating fluid containing a special tracer substance, such as helium, at a certain pressure. When the special tracer substance escapes from the leak hole, a special detection device such as a helium mass spectrometer leak detector can be used to find the location of the leak hole.
Finally, during the diagnosis process, it is also necessary to pay attention to the appearance and structure of the air valve body. Observe whether the air valve body has obvious defects such as damage, cracks or deformation, which may be the direct cause of the leak. At the same time, it is also necessary to check whether the sealing material and sealing surface of the air valve body are intact, and whether the connection between the components is tight.
In summary, diagnosing the leakage problem of the air valve body requires comprehensive consideration of multiple aspects such as sound, pressure, special tracer substances and appearance inspection.
