We cannot tell you what discharge head a pump will provide unless you tell us
the suction head (the head at the pump inlet). Think of a pump as ‘adding’
head to your system. For example, imagine a pump that ‘adds’ 20m head. If
the head at the pump inlet is 5m then the discharge head will be 25m.
Differential Pressure = Discharge Pressure – Suction Pressure
1 UK gallon = 4.5461 litres (dm³)
Approximately 1 m³ = 220 UK gallons
1 USA gallon (231 cubic inches) = 3.7854 litres (dm³)
Approximately 1 UK gallon = 1.2 USA gallons
Pump performance curves supplied will show differential head (in metres) against flow (in m³/h) and will be based on tests pumping water at 20°C using a 50Hz supply. They therefore reflect the majority of products (eg milk, beer, wine, spirits, caustic solutions for CIP, dilute acids, etc).
Density affects the differential pressure (but not the head) and power. For a specific gravity of 1.3, the differential pressure and the power required will be 1.3 times the corresponding values when pumping water.
Viscosity affects flow, differential head, efficiency and power. For liquids with a different viscosity to water (1 cP), corrections must be made. Please contact MDM Pumps Ltd for advice.
For an existing pump
To provide you with a performance curve for an existing pump manufactured by MDM Pumps Ltd, we need to know the pump serial number.
For a new pump
If you wish to see a pump performance curve for a new pump that you require, you will of course need to provide us with all the essential information for a quotation. Please note that prior to the testing of a pump, we can only provide guideline performance curves.
We do provide non-standard pump performance curves on request; eg for a 60Hz supply or if pumping a viscous liquid.