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MTH Pumps - Boiler Feed Service

Boiler Feed Systems

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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 (T31 • T41 • T51 Series 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 (100 • 200 Series1750 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	152L	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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