DG type high pressure boiler feed water pump-Shenyang Petrochemical Power Station Pump Co., Ltd

DG type high pressure boiler feed water pump

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Power Station Section

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13804068898

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Detail

Overview
DG type high-pressure boiler feed water pump is used as high-pressure boiler feed water or other high-pressure clean water pumps, and the temperature of the conveying medium shall not exceed 160 ℃.
Performance range
Flow rate:Q = 100 ~ 580m ³/h
Head: H = 740~2150m
Model Description

Structure
This type of pump is a single shell segment type multistage centrifugal pump. The suction port and the discharge port are both vertically upward. The middle section, the suction section and the discharge section are connected as a whole with a through bar. The static joint surface between each section is mainly sealed by the metal surface, and an 0-shaped rubber ring is provided as an auxiliary seal. The suction section, middle section and discharge section of DGB high pressure pump adopt forgings.
shaft seal
The shaft seal of this type of pump is sealed with soft packing, cooled with cooling water, and mechanical seal can also be used according to user needs.
Bearings and balancing devices
The pump rotor is supported by sliding bearings at both ends of the pump. Bearing with forced lubrication, pump itself with oil system.
The axial thrust of the rotor is balanced by a balance disc. And with a thrust bearing, used to bear the residual axial force due to changes in working conditions, a return pipe is installed between the balance chamber body and the suction pipe.
Drive
The pump is driven by an electric motor through an elastic coupling, and can also be equipped with a toothed coupling, a diaphragm coupling, and a hydraulic coupling according to user needs. The prime mover may be driven by a small steam turbine or an electric motor.
Materials
Suction section……carbon steel or chrome steel
Spit out section……carbon steel or chrome steel
Guide vane……carbon steel or chrome steel
Impeller……carbon steel or chrome steel
Shaft……chromium molybdenum steel or chromium steel
Sealing ring……chromium-molybdenum steel or chromium steel
Guide vane sleeve……chromium-molybdenum steel or chromium steel
Performance parameter table of DG type feed water pump

Pump type	Flow rate Q （m³/h）	head H （m）	Rotational speed n （r/min）	power （kW）		efficiency η （%）	Cavitation allowance (NPSH)r （m）	Impeller diameter D₂ （mm）	Pump weight （kg）
Pump type	Flow rate Q （m³/h）	head H （m）	Rotational speed n （r/min）	Shaft power	Motor power	efficiency η （%）	Cavitation allowance (NPSH)r （m）	Impeller diameter D₂ （mm）	Pump weight （kg）
1DG-12	120 168 200	1550 1400 1296	2980	815 889 994	1000	66 72 71	3.9 4.5 5.4	300	3580
2DG-10 2DGB-10	200 270 280	1680 1515 1480	2980	1280 1480 1495	1600	71.5 72.6 75.6	6.5	348	4800
3DG-10 3DGB-10	360 440 496	1660 1560 1470	2985	2087 2337 2483	2500	78 80 80	8	340	4800
4DG-8C	450 500 575	1810 1680 1480	2985	2773 2933 3175	3200	80 78 73	12	391	7000
5DG-10	500 570 630	2300 2150 2080	2985	3916 4142 4469	4800	80 81 79.5	6.5	404	7000
DG270-140B	270 320 360	1570 1500 1422	2985	1565 1730 1790	2000	74 76 78	6.5	335	4800
DG270-140C	270 360 440	1750 1640 1490	2985	1839 2036 2260	2300	70 79 79	6.5	340	4800
DG400-180C	375 400 450	2000 1975 1900	2985	2683 2773 2947	3200	76 77.5 79	12	380	7000
DG450-180	400 450 500	1920 1825 1700	4600	2700 2870 2935	3200	75 78 79	23.5	290	3200