Condensate pumps Mechanical pumps and pumps traps
9
How to use the sizing chart
Example: DN50 pump capacities
Flowrate kg/h
Capacity multiplying factors for other filling heads
Capacity multiplying factors
Filling head metres (m)
DN25
DN40
DN50
DN80 x DN50
0.15
0.90
0.75
0.75
0.80
6.1.28
0.30
1.00
1.00
1.00
1.00
0.60
1.15
1.10
1.20
1.05
0.90
1.35
1.25
1.30
1.15
For motive fluids other than steam, see the table below.
Final pump selection
The size of pump selected in this case would be DN50. This has the capability to pump:- 0.75 x 2400 kg/h = 1800 kg/h easily coping with a condensate load of 1500 kg/h. Note: Steam (saturated or superheated) is the recommended motive fluid for steam systems. If the motive fluid is not steam, then the capacity above must be multiplied by the appropriate factor in the table below.
9.1 31
Capacity multiplying factors for motive gas supplies (other than steam) % Backpressure Vs Motive pressure (BP/MP)
10% 20% 30% 40% 50% 60% 70% 80% 90%
Pump size
Capacity multiplying factors
DN25
1.20
1.25
1.30
1.35
1.40
1.43
1.46
1.50
1.53
DN40 DN50
1.20
1.25
1.30
1.35
1.40
1.43
1.46
1.50
1.53
1.02
1.05
1.08
1.10
1.15
1.20
1.27
1.33
1.40
DN80 x DN50
1.02
1.05
1.08
1.10
1.15
1.20
1.27
1.33
1.40
TI-P136-02 CMGT Issue 17
Page 9 of 11
MFP14, MFP14S and MFP14SS Automatic Pumps
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