Boiler Feed Systems

One of the early applications for regenerative turbine pumps is in boiler feed systems. In a boiler feed system, the pump supplies make-up water to the boiler as the boiler water is turned into steam. Steam boilers operate under pressure, so the pump must develop enough pressure to overcome the boiler pressure as well as losses due to friction from piping and check valves. Because of their high pressure pumping characteristic and their ability to pump water at temperatures close to boiling (low NPSH requirement) MTH regenerative turbines are very well suited to this application. MTH services boilers in a variety of sizes; from small units supplying steam for local drycleaners, to larger systems making steam for industrial processes and commercial heating systems. MTH can provide regenerative turbine feedwater pumps for boilers ranging in size from 10KW to 800HP, and operating pressures to 1000 psi. We are standard equipment on many well known boiler manufacturer's systems.

Regenerative turbine pumps are desirable for on/off water supply, as opposed to continuous feed make-up. A centrifugal pump used in conjunction with a regulating valve is the typical arrangement utilized when continuous operation is required. Please see our low cost stainless steel C41/C51/C61 Series Centrifugal products for continuous feed make-up systems.

MTH also offers low cost stainless steel versions of our regenerative turbine products that feature stainless steel casings and corrosion resistant nickel silver impellers that far exceed the life expectancy of bronze fitted iron units. Please contact the factory and ask about our 7CT7MTH unit which is part of our MTH CT Series line, as well as our MTH CR and MTH CS Series lines.

Boiler Feed Selection Guide

Close Coupled Models (3450 RPM)

Boiler HP

Evap Rate GPM

Pump Rate GPM

BOILER PRESSURE IN PSI
15
50
100
125
150
200
250
Model HP Model HP Model HP Model HP Model HP Model HP Model HP
15 1 3.1 T31C 0.3 T31D 0.3 T31F 0.3 T41D 0.5 T41E 0.75 T51D 1 T51E 3
20 1.4 4.1 T31D 0.3 T31E 0.3 T41E 0.5 T41D 0.5 T41E 0.75 T51D 1 T51E 3
25 1.7 4.4 T31E 0.3 T31F 0.3 T41E 0.5 T41E 0.75 T41E 0.75 T51D 1 T51E 3
30 2.1 5 T31E 0.3 T31F 0.3 T41E 0.5 T41E 0.75 T41G 1 T51E 2 T51E 3
40 2.8 5.6 T31F 0.3 T31G 0.3 T41E 0.5 T41G 1 T41J 1.5 T51E 2 T51G 5
50 3.5 7 T31G 0.3 T41J 0.75 T41G 0.75 T41L 1.5 T51E 1.5 T51G 3 T51G 5
60 4.2 8.3 T41J 0.3 T41J 0.75 T41J 1 T41L 1.5 T51G 2 T51G 3 T51L 5
70 4.8 9.6 T41J 0.5 T41J 0.75 T41M 1.5 T41M 2 T51G 2 T51J 3 T51L 5
80 5.5 11 T41M 0.5 T41M 0.75 T41M 1.5 T51J 2 T51J 3 T51J 3 T51L 5
100 6.9 14 T41M 0.5 T41M 0.75 T41P 2 T51L 3 T51M 5 T51M 5 T51M 7.5
125 8.6 17.5 T41M 0.75 T41M 0.75 T51M 3 T51M 3 T51M 5 T51R 7.5 T51R 7.5
150 10.7 21 T41P 2 T51M 2 T51M 3 T51P 5 T51P 5 T51R 7.5    
200 13.8 28 T51P 2 T51P 3 T51R 5 T51R 5 T51R 7.5        

 

Flexible Coupled Models (1750 RPM)

Boiler HP

Evap Rate GPM

Pump Rate GPM

BOILER PRESSURE IN PSI
15
50
100
125
150
200
250
Model
HP
Model
HP
Model
HP
Model
HP
Model
HP
Model
HP
Model
HP
15 1 3.1 141D 0.3 141D 0.75 142E 1 142E 1.5 142F 1.5 143E 2 144E 3
20 1.4 4.1 141D 0.3 141D 0.75 142E 1 142E 1.5 142F 1.5 143E 2 144E 3
25 1.7 4.4 141D 0.3 141D 0.75 142E 1 142E 1.5 143E 1.5 143E 2 144E 3
30 2.1 5 141D 0.3 141D 0.75 142E 1 142E 1.5 143E 1.5 143E 2 144E 3
40 2.8 5.6 141D 0.3 141E 0.75 142F 1.5 142G 2 143E 1.5 144F 3 144I 7.5
50 3.5 7 141D 0.3 141F 0.75 142F 1.5 143F 2 143F 2 144I 5 144I 7.5
60 4.2 8.3 141E 0.3 141F 0.75 142G 2 143G 2 143G 5 144I 5 144I 7.5
70 4.8 9.6 141F 0.5 141I 1.5 142I 3 143I 3 143I 5 144I 5 144I 7.5
80 5.5 11 141F 0.5 141I 1.5 142I 3 143I 3 143I 5 144I 5 144I 7.5
100 6.9 14 141G 0.5 141I 1.5 142IA 3 143I 3 143IA 5 144I 5 152I 10
125 8.6 17.5 141I 0.75 141IA 1.5 142IA 3 143I 3 143IA 5 144IA 7.5 152I 10
150 10.7 21 141I 0.75 141IA 1.5 151I 5 143IA 5 144IA 5 152I 7.5 153I 10
200 13.8 28 141IA 1 182K 2 151K 5 152I 5 162D 7.5 162D 10 163D 15
250 17.3 33 181M 1.5 151K 3 152K 5 152K 7.5 162D 7.5 162G 10 153L 15
300 20.7 38 181M 1.5 151K 3 152K 5 152K 7.5 152L 10 162G 15 153L 15
350 24.2 43 181P 1.5 151L 5 152L 7.5 152L 10 152L 10 162G 15 153L 15
400 27.6 48 181R 2 151L 5 162L 7.5 152L 10 162G 15 162G 15 163G 20
500 34.5 57 151L 3 161G 5 162G 10 162G 10 163G 15 164G 20 173H 25
600 41.5 71 161G 3 161G 5 172H 15 172H 15 172J 20 173H 20 173K 30
700 43.5 77 161G 3 171K 7.5 172K 15 172K 15 173K 20 174H 20 174J 30
NOTES:
Above pumps are selected for intermittent (on-off) operation and with ODP (Open Drip Proof) motors.
This selection is for reference only. Please refer to the technical data for the specific model to ascertain suitability in your application, or contact your local distributor.

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