DG High Pressure Boiler Feed Pump - SeekPartfile.seekpart.com/keywordpdf/2011/5/21/20115214314198.pdf · High pressure boiler feed pump Shaft sealing The rotating of these pumps are

High Pressure Boiler Feed Pump DG

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Application Type DG high pressure boiler feed pumps are used for feeding high pressure boiler or pump-ing high pressure clean water. The temperature of pumped media is not more than 160 °C Range of capacity: 100 to 580 m3/h Range of total head: 1128 to 1690m

Construction The pumps are sectional casing multi-stage centrifugal pump. Suction and discharge nozzles of pumps are arranged vertically up. Section middle stage and discharge casing are rigidly held together by tie bolts. The joints between these casings are primarily sealed by means of metal-metal contact simultaneously. O-ring are used as auxiliary seals. The forged pieces are used for the suction, stage and discharge casing of type BGB high pressure boiler feed pump.

High pressure boiler feed pump

Shaft sealing The rotating of these pumps are sealed by soft-packing and cooling water. In the region of shaft sealing, the pump shaft is protected by renewable sleeve.

Bearings and Axial balancing device The rotating assembly is supported by sliding bearings on both ends of the pump shaft. Bearing of pump are forced—lubricated. The oil system is equipped for type DG pump. The axial thrust of rotor is balanced by balance disc. And the thrust bearing is also provided which is used to bear residual axial force caused by the change of working conditions.

Drive The pump is directly driven by motor through the coupling. The gear, membrane coupling can be used according to client’s requirements. The pump can be driven by turbine or motor. The rotating direction of pumps are clockwise when viewed from the driving end.

Materials Suction casing, discharge casing, diffuser, and impeller: carbon steel or chrome steel shaft, wear ring and diffuser bush: chromic alum steel or chrome steel.

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

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High pressure boiler feed pump

DG Construction

103 Suction casing 114 Tie bolt 213 Balance disc

104 Stage casing 215 Balance plate 214 Balance bush

105 Discharge casing 121 Casing wear ring 219 Coupling

106 diffuser 201 Pump shaft 307 Bearing

117 Diffuser sleeve 202 impeller

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

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High pressure boiler feed pump

DGB Construction

103 Suction casing 201 Pump shaft

104 Stage casing 202 Impeller

105 Discharge casing 213 Balance disc

106 Diffuser 214 Balance bush

117 Diffuser sleeve 215 Balance plate

114 Tie bolt 219 Coupling

121 Casing wear ring 307 Bearing

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

TEL:+8610 88580010/20/30 FAX:+8610 88580150

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High pressure boiler feed pump

Performance curves

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

TEL:+8610 88580010/20/30 FAX:+8610 88580150

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High pressure boiler feed pump

Performance curves

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

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High pressure boiler feed pump

Performance Data

Model Capacity Head Speed Eff. (NPSH)r Impeller Dia. WT Q(m3/h) H(m) n (r/min) Shaft Motor % m mm kg

120 1560 750 68 3.4

1DG-12 140 1540 2980 816 1000 72 4.1 300 3580

170 1450 946 71 4.7

2DG-10 200 1680 1270 71.5

270 1515 2980 1480 1600 72.6 6.5 348 4800 2DG(B)-10 280 1480 1495 75.6

3DG-10 360 1660 2087 78

440 1560 2985 2337 2500 80 8 340 4800 3DG(B)-10 496 1470 2483 80

450 1810 2773 80

4DG-8C 500 1680 2985 2933 3200 78 12 391 7000

575 1480 3175 73

500 2300 3916 80

5DGB-10 570 2150 2985 4121 4800 81 6.5 404 7000

630 2080 4489 79.5

270 1570 1565 74

DG270-140B 320 1500 2985 1730 2000 76 6.5 335 4800

360 1422 1790 78

270 1750 1839 70

DG270-140C 360 1640 2985 2036 2300 79 6.5 340 4800

440 1490 2260 79

400 1975 2780 3200 77.5

DG400-180C 450 1900 2985 2950 79 12 391 7000

500 1815 3130 4000 79

440 1920 2700 75

DG450-180 450 1825 4600 2870 3200 78 23.5 290 3200

500 1700 2935 79

Power

1. The performance parameters shown are obtained in testing at water temperature 20˚C 2. This pump do not allow operation when capacity is less than 70m3/hr 3. Performance of other stages are converted in proportion.

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

TEL:+8610 88580010/20/30 FAX:+8610 88580150

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High pressure boiler feed pump

Outline & installing Dimensions of DG DGB

Outline & installing Dimensions of DG150-100 Pump

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Rm A-205 Ziyunxuang Building No.81 Zizhuyuan Rd. Haidian Dist. Beijing China

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Model L L1 L2 L3 L4 L5 L6 L7 b8 B1 B2 H H1 H2 n1-d11DG-12 2637 1178 669 531 1451 1551 311 240 756 1076 1040 600 180 4φ-50

2DG(B)-10 2778 1289 746.5 621 1570 1670 272 245 1000 1300 1325 675 180 4φ-503DG(B)-10 2775 1289 744 569 1570 1670 269 245 910 1300 1325 675 180 4φ-504DG-8C 2750 1145 820 565 1660 2000 120 370 1080 1390 1500 800 200 4φ-565DGB-10 2819 1430 693 458 1800 1900 2240 318 298 1080 1390 1500 800 150 4φ-56

DG270-140B 2775 1289 746.5 533.5 1633 1740 1930 272 245 910 1219 1325 675 150 4φ-48DG270-140C 2775 1289 746.5 533.5 1633 1740 1930 272 245 910 1219 1325 675 150 4φ-48DG400-180C 3057 1386 872 617 1800 1900 2040 120 370 1080 1390 1500 800 150 4φ-56

High pressure boiler feed pump

Outline & installing Dimensions

Model D1 D2 D3 n2-d2 D4 D5 D6 D7 n3-d3 D8 D9 D10 n4-d4 α1DG-12 152 250 300 8φ-26 102 162 235 300 8φ-33 40 110 145 4φ-18 22.5°

2DG(B)-10 250 370 425 12φ-30 175 213 394 475 12φ-48 40 110 145 4φ-18 22.5°3DG(B)-10 250 370 425 12φ-30 175 213 394 475 12φ-48 40 110 145 4φ-18 22.5°4DG-8C 300 430 485 16φ-30 225 265 483 580 12φ-58 50 135 175 4φ-23 22.5°5DGB-10 300 430 485 16φ-30 225 265 483 580 12φ-58 50 135 175 4φ-23 45°

DG270-140B 250 370 425 12φ-30 175 213 394 475 12φ-48 40 110 145 4φ-18 22.5°DG270-140C 250 370 425 12φ-30 175 213 394 475 12φ-48 40 110 145 4φ-18 22.5°DG400-180C 300 430 485 16φ-30 225 265 483 580 12φ-58 50 135 175 4φ-23 0°