Leakage rate detection of water ring vacuum pump

Leakage rate detection of water ring vacuum pump

With the development of society, vacuum pump has been widely used, especially water ring vacuum pump is a typical vacuum pump. In order to use it better, we often need to detect the leakage rate, which is mainly divided into internal leakage and external leakage detection. The internal leakage is more complex. Let's have a detailed understanding.

1. The internal leakage of water ring vacuum pump mostly occurs on the equipment with water-cooled jacket. No doubt was found through checking the external leakage, but there are the following phenomena: the pumping speed of mechanical pump is obviously low, the indicated value of vacuum gauge is low, the mechanical pump oil is quickly emulsified, and the iron-based parts in vacuum chamber are obviously rusted. If the above conditions are met, internal leakage can be basically determined. Clean the inner wall first, and then pass cooling water to see if there is any wet point. The wet point is the leakage point.

2. Small leakage and micro leakage are difficult to check. The commonly used method is to use the ionization tube sensitive to some gases in high vacuum state to detect leakage, such as acetone or ethanol. Use a medical syringe to spray acetone or ethanol to the suspicious place. When it is sprayed to the leakage point, the pointer of the ionization meter will swing obviously. In this way, we must be patient, wait until the indicator value of the ionization meter is stable, that is, the pumping capacity and leakage rate of the water ring vacuum pump are balanced, and then spray again, try to repeat several times to confirm the leakage point.

3. For larger leakage point, flame method can be used. Based on the principle that air flow can make the flame deviate, vacuum first. For example, use candle or lighter to gradually search around the suspicious point, and it will be found that the flame deviates to the leakage point, then the leakage point can be found.

Water Ring Vacuum Pump Selection Steps

Water Ring Vacuum Pump Start And Stop Operation And Precautions

Rotary Vane Vacuum Pump For Resin Defoaming