General Pump KE Owner Manual - Manual (Page 9)

Page 9
GENERAL PUMP
A member of the Interpump Group
KE SERIES
9.7 Internal diameter of piping
To determine the internal diameter of the piping, follow the following diagram.
Example 1 (-----)
With a flow of 150 l/m and a water speed of 0.45 m/sec, the diagram line joining the 2 scales intersects the central
scale, indicating the diameters, at a value of 80mm.
Example 2 ( )
With a flow of 70 l/min and a water speed of 5.5 m/sec, the diagram line joining the 2 scales intersects the central
scale, indicating the diameters, at a value of 16mm.
Optimal speeds:
- suction:0.5 m/sec
- delivery: 5 m/sec
The diagram does not take into consideration the pipe and valve resistance, drop in pressure, due to the
pipe length, the viscosity of the pumped fluid, its temperature, etc.