Why can’t a pump draw in gases?
Thread Content
Pumps can draw liquids, and compressors can compress gases – why can’t pumps be used to draw gases?
This question is actually very simple. 1. The gap between the pump impeller and the pump casing is large. 2. The pump’s rotational speed is relatively low. 3. The pump’s seal is not very tight. In fact, the structural design of the pump is basically the same as that of a centrifugal compressor. The main differences lie in the points mentioned above. For the incomplete parts, please ask an expert to help.
As the original poster said, a pump is used to draw liquids, while a compressor is used to compress gases – this is because gases can be compressed whereas liquids cannot; in other words, a compressor cannot be used to handle liquids, and a pump cannot be used to draw gases. The structure of the pump is designed to convert kinetic energy into pressure
Reply to 1# lijunlijun2010: The pump can pump gases! 1. Vacuum pump 2. Self-priming pump 3. Jet pump 4. Positive displacement pump – most of them have self-priming capability.
The vacuum pump is still not pumping gas.
Pumps can be used to pump gases, but the seals of most pumps do not meet the requirements for transporting gases. Such as metering pumps.