Flow inconsistence

[Thuba]

l have a pump rated at 4m3/h and 35m head. lt pumps edible oil through an economizer and the to dearator with some nozzles. From the dearator there is another pump feeding a vessel (rated 9m3/h and 40m head) and there is a flowmeter reading 1800L/h (1.8m3/h). Some how the dearator gets empty or starved with oil. My question is how so as the dearator pump is just pumping 1.8 m3/h from the dearator, while the one feeding it is feeding at a rate of 4m3/h. see attached schematics

 

[pierreick]

Stop duplicating posts! this is becoming ridiculous.

Here we are mixing apples and carrots. The operating point is the intersection about the pump curves and systems. It is plausible that you have more head losses on your system than you expect which affect the system. Did you check the system (nozzles, cleanliness of the pipe, filters if any, other pieces of equipment)?
Did you check the flow meter and its calibration?
A long way to go.
Pierre

 

[shvet]

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