Why is it required that the head increase from the pump’s rated operating point to the shut-off point not exceed 20% or 30%
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Why is it required that the head increase from the pump’s rated operating point to the shut-off point not exceed 20% or 30%? ? ? ? ? Could an expert explain the reason?
It is specified in API610
I know this, but I don’t understand what the fundamental reason for the rule is
This ensures that the pump has a stable head and efficiency. I don’t understand mechanics
I understand there are two reasons: 1. A steadily rising performance curve allows for better control of flow; when the system curve changes, pressure fluctuations are not too severe. Otherwise, if the curve is too steep, changes in flow result in large variations in the pump’s head pressure. 2. The impact on downstream equipment is due to the fact that API610 covers the most challenging pumps in the petrochemical industry. Imagine a BB5 pump with a head of 500 meters; if the maximum allowable head is too high, it will require the downstream system to have a higher pressure rating, resulting in over-design of the downstream equipment