H curves (60Hz)
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60 Hz curves for the current range of Centrifugal pumps - flooded suction 

Please select the appropriate PDF file from the table below.

Note: all these curves are 3500 rpm, 60 Hz Go to 50 Hz curves 

PDF file


Typical flow 

Max head

Issue & file size

Overview - current range of flooded suction pumps, ie D121 / H141 / H161 / H191 / H221 / H241 / D5A

contact MDM 25mm (1") eye 1 - 10 m3/h    
P40cur60 40mm (1.5") eye 5 - 20 m3/h   Iss 2, 01/08 47kB
P50cur60 50mm (2") eye 15 - 30 m3/h    Iss 2, 01/08 48kB
P80cur60 80mm (3") eye 25 - 65 m3/h   Iss 1a, 12/07 46kB
 contact MDM 100mm+ (4"+) eye 60 - 360 m3/h    

The curves show the pressure (m head) against flow (m3/h) for water at 20oC and for a pump operating at 2 pole speed (3500 rpm with a 60 Hz supply).
They therefore apply to any fluid which is similar to water and has a viscosity of 1 cP and a specific gravity of 1.
For Air Separator 'AS' pumps and flooded suction pumps operating at other speeds, viscosities and specific gravities please
contact MDM
Curves are approximate and are subject to change without notice.
The files are in Adobe PDF format. Visit the Adobe website if you need to
download the Adobe Acrobat reader (freeware).