How to determine valve sticking on-site for high-pressure coal slurry pumps?
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That is, how can one determine whether a valve is stuck by checking the pressure gauge at the site? Is there any specific explanation for this? Also, how can one tell whether it’s the inlet valve or the outlet valve that is stuck?
Valves generally regulate flow by changing the size of the flow area! If the inlet valve gets stuck, it means that the inlet flow rate decreases; as a result, the pressure before the inlet valve increases relatively, and the pump is prone to gas entrapment ； Conversely, if the outlet valve gets stuck, it means the flow rate decreases, and the pressure behind the outlet valve will drop.