Page 5 of 6
The capacity charts are based on a filling head of 0.3 m.
The lift lines represent the net effective lift (i.e. lift plus frictional resistance).
DN25 pump capacities
DN40 pump capacities
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Flowrate kg/h
Flowrate kg/h
Flowrate kg/h
DN50 pump capacities
DN80 x DN50 pump capacities
Note: If you are in any doubt about the size of the pump required or if the conditions are unusual we will be glad to advise you if you give us the
answers to the following questions:-
1. Nature of liquid to be pumped.
2. Temperature of liquid to be pumped.
3. Quantity to be pumped (kg/h or litres/h).
4. Initial lift horizontal distance and net effective lift (i.e. initial lift less subsequent fall in discharge line).
5. Operating medium (steam, compressed air or gas).
6. Operating pressure available.
7. The pump is generally used to drain water from a vented receiver but under certain circumstances can drain a unit from under steam
pressure or vacuum - state which.
Note: To achieve rated capacity, the pump must be installed with check valves as supplied by Spirax Sarco. Use of a substitute check valve
may affect the performance of the pump.
MFP14, MFP14S and MFP14SS Automatic Pumps
TI-P136-02 ST Issue 12
Page 5 of 6
Flowrate kg/h
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