Issues with fluctuating outlet pressure in Ingersoll Rand air compressors
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I would like to ask the experts here: Today, the outlet pressure of our air compressor dropped suddenly for no apparent reason, falling from 0.67 MPa to 0.6 MPa, while the current decreased from 101.5 A to 98 A. What could be the possible causes of this? I’ve thought about it for a long time without coming to any conclusion, and I didn’t notice anything unusual when I went to the site. I hope fellow sailors can help analyze it! Thank you!
Under normal circumstances, the pressure should decrease while the current should increase; there is a contradiction in the parameters, so calibrate the gauge first
The load on the compressor is determined by the back pressure; check whether there is an increase in gas consumption or leaks, as a decrease in exhaust pressure will also lead to a decrease in current, which is normal.
Check whether the gas consumption at the backend has increased, whether the self-cleaning filters at the frontend are clogged, and whether the inter-stage coolers are functioning properly, among other things.
There’s nothing wrong with the gauge; a decrease in current indicates a reduction in power, and a drop in pressure should be normal
There’s no problem with the self-cleaning filter; it doesn’t seem clogged from the outside, and the back side has not been checked yet...
It is correct that the pressure decreases and the current decreases. But it’s not right for the pressure to drop suddenly; should it be uninstalled? It’s either due to a sudden increase in the amount of gas used, or there is a leak somewhere.
Check for a drop in pipeline network pressure.
It’s probably because of a sudden increase in gas consumption downstream. Another issue is insufficient inbound traffic. Check it out!
This post was last edited by xusi0825 on 2015-6-25 at 16:37: 1. Is there any blockage at the inlet or are the valves closed? 2. Has there been any change in the temperature of the cooling water, with the air not being cooled down? 3. Are the inlet guide vanes adjusted to a narrower position?
After we reduced the size of the check valve, the pressure returned to normal; it seems that the pressure fluctuations were caused by changes in air temperature.