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| DOC9063L
Ocean Master 1000
3.5 Pressure drop
The pressure drop in the system depends on the flow and on the other side the flow will depend on the
pressure drop.
It is a mathematical iteration process, therefore in practice we need to start the calculation with a guess.
As a start value for the flow it will be recommended to use the flow corresponding to the static lift + 1
meter corresponding to 0,1 bar or 100 mbar.
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It is possible to calculate the pressure drop manually, but there is a lot of free programs for download.
Use the system data to evaluate the pressure drop used as start value.
The calculated value can be used to find out if the start value is too low or too high.
Example
If the calculated pressure drop is far below the start value (100mbar) make a new calculation with the flow
based on for example 50 mbar. Start with the static pr 50 mbar and find the flow from the curve.
If the calculated pressure drop is far above the start value (100 mbar), make a new calculation with the
flow based on for example 200 mbar. Start with the static pr 200 mbar and find the flow from the
curve.
NOTE: Pressure drop above 100 mbar indicates that your pipe diameter is too small for the pump you are
using.
