Product
Multi-purpose Sludge Pump
Product Introduction:
Overview

The multi-purpose sludge pump is single-stage single-suction centrifugal pump, and comprises several series and various specifications such as 500mm, 450mm, 400mm, 350mm, 300mm, 250mm, 200mm,150mm and so on according to outlet diameter. The pump is innovative in hydraulic design and structural design, and adopts the overflowing part cast by strong abrasion-resistant high chromium wear-resistant alloy, so the pump has the characteristics of high efficiency, energy conservation, wear resistance, reliable operation and so on. The blade number of the impeller of the pump can be changed according to different working conditions; and the pump is suitable for conveying strong-abrasion mortar, tailing slurry, slag and so on containing big and small solid particles. The maximum mixture concentration of conveyed powdery is up to 60 percent. Therefore, the pump is ideal sand pumping and conveying equipment and users can select single machine or multiple serially-connected machines to achieve the aim of long-distance conveying according to actual working conditions. The pump is widely applied to sand pumping from river channels and reservoirs, exploiting seashore, conveying electric fly ash and conveying tails in the metallurgical industry, etc.

The pump can be equipped with different diesel engine unit, generator system and big or small pumps of different models according to different user’s requirements.

Structural Property


1、The pump body adopts a two-layer metal structure with an inner layer and an outer layer; the pump shell is vertically opened in the middle; and the water outlets are rotationally installed at 45 degree intervals.

2、The proper shaft seal can be selected such as auxiliary impeller shaft seal, packing shaft seal and mechanical seal according to different working conditions.

3、The pump adopts closed impeller, so the pump has good wear resistance and high pump efficiency.

4、The pump can convey mixture containing few big particles through adjusting the blade number and the impeller diameter.


NS
Structural Drawing of NS Sludge Pump

1、Shaft Joint 2、Shaft 3、.Bearing Housing 4、.Disassembly Ring 5、Auxiliary Impeller 6、Back Guard Plate 7、Worm Shell 8、Impelle 9、Front Guard Plate 10、Front Pump Shell 11、Back Pump Shell 12、Packing Box 13、Water-Sealing Ring 14、.Pedestal 15、Bracket 16、Adjusting Screw

Parameters and Model Spectrum

Model

Allowable Mating Maximum Power
(kw)

Clear Water Performance

The Maximum Particle Size Passed Discontinuously
(mm)

Pump weight
(kg)

Flow Rate Q
(㎡/h)

Pump Lift
(m)

Speed
(r/min)

Peak Efficiency
(%)

Net Positive Suction Head
(m)

500NS-I-A140

1200

3750-7960

49-55.2

200-490

82

5-10

120

19100

450NS-I-A140

1200

3310-6610

52-57

200-490

85

5-10

120

18864

400NS-I-A125

1200

2520-5040

48-66

200-500

80

4.5-9

110

14432

350NS-I-F100

560

526-2339

14.9-62.8

300-590

77.6

4.4

96

5465

300NS-I-A100

450

464-1826

15.3-65.2

300-590

81.1

3.0

88

5265

300NS-I-A95

400

441-1735

13.8-58.8

300-590

78.1

3.0

88

5220

300NS-I-A90

560

505-1844

21.2-79.9

400-730

82.8

3.9

85

5005

300NS-I-A85

450

477-1742

18.9-71.3

400-730

79.8

3.8

85

4965

300NS-I-A70

630

635-2333

16.0-76.8

490-980

80.4

3.9

92

3560

300NS-I-A65

500

589-2166

13.8-66.2

490-980

77.4

3.7

92

3531

300NS-I-A56

250

395-1568

9.7-46.0

490-980

80.9

3.5

96

3030

250NS-I-A103

560

402-1573

29.7-110.5

400-730

74.5

2.8

69

5085

250NS-I-A96

560

403-1466

25.4-93.7

400-730

77.8

3.5

69

5200

250NS-I-A90

450

378-1374

22.3-82.4

400-730

73.8

3.4

69

5035

250NS-I-A85

800

376-1504

30.1-128.7

490-980

76.5

3.5

96

4530

250NS-I-A83

800

367-1469

28.7-122.7

490-980

75.5

3.5

76

4514

250NS-I-A80

710

354-1416

26.7-114.0

490-980

73.5

3.4

76

4490

250NS-I-A78

630

345-1380

25.4-108.4

490-980

71.5

3.2

76

4474

250NS-I-A75

560

300-1480

20.8-97.5

490-980

77.5

3.0

72

3480

250NS-I-A73

500

292-1441

19.7-92.4

490-980

76.5

3.0

72

3466

250NS-I-A70

450

280-1381

18.1-84.9

490-980

74.5

2.9

72

3446

250NS-I-A68

450

272-1342

17.1-80.1

490-980

73.5

2.7

72

3432

250NS-I-A65

315

299-1249

15.4-71.0

490-980

76.9

3.0

72

3020

250NS-I-A63

315

290-1211

14.4-66.7

490-980

75.9

3.0

72

3008

250NS-I-A60

280

276-1153

13.1-60.5

490-980

73.9

2.8

72

2991

200NS-I-A85

560

221-907

32.0-133.7

490-980

70.5

2.8

54

4110

200NS-I-A75

355

225-900

22.8-102.9

490-980

74.1

3.0

56

3070

200NS-I-A73

355

219-876

21.6-97.5

490-980

73.1

3.0

56

3056

200NS-I-A70

315

205-976

19.4-86.4

490-980

75.6

2.8

56

2465

200NS-I-A68

315

199-948

18.3-81.5

490-980

74.6

2.8

56

2453

200NS-I-A65

250

235-950

16.4-72.0

490-980

79.6

2.5

62

2323

200NS-I-A63

250

228-921

15.4-67.6

490-980

78.6

2.5

62

2311

200NS-I-A60

185

218-870

13.9-62.0

490-980

83.5

2.5

62

2223

200NS-I-A58

185

211-841

13.0-57.9

490-980

82.5

2.5

62

2214

200NS-I-A50

185

180-648

11-34.4

490-980

82.7

2.5

55

2013

150NS-I-A71

220

142-552

21.8-93.8

490-980

69.8

2.4

48

2263

150NS-I-A70

185

93-401

20.0-91.2

490-980

62.3

2.0

37

2245

150NS-I-A65

200

150-600

17.4-75.7

490-980

70.8

2.5

48

2223

150NS-I-A63

185

146-582

16.3-71.1

490-980

69.8

2.5

48

2211

150NS-I-A60

160

135-550

14.7-63.5

490-980

75.9

2.5

48

2203

150NS-I-A58

132

131-532

13.7-59.3

490-980

74.9

2.5

48

2033

150NS-I-C58

160

134-596

12.8-61.0

490-980

69.1

2.0

75

2063

150NS-I-A57

110

95-427

13.2-56.3

490-980

67.8

1.8

32

2023

150NS-I-A55

110

124-504

12.3-53.4

490-980

72.9

2.3

48

2019

150NS-I-A50

75

115-460

9.5-43.1

490-980

76.8

2.5

48

1735

150NS-I-A48

75

111-442

8.7-39.7

490-980

75.8

2.5

48

1728

150NS-I-C42

132

142-550

12.1-62.8

700-1480

77.1

2.2

69

1605

100NS-I-A60

315

103-380

55-176

700-1480

55.1

3.0

30

1575

100NS-I-A50

160

85-360

20.5-100.2

700-1480

69.6

2.5

34

1475

100NS-I-A46

132

79-331

17.3-84.8

700-1480

67.6

2.3

34

1461

100NS-I-A42

90

66-275

14.7-70.8

700-1480

71.0

2.5

35

1075

100NS-I-B42

90

83-365

12.7-66.8

700-1480

71.6

2.5

40

1085

100NS-I-A39

75

61-255

12.6-61.0

700-1480

69.0

2.4

35

1064

100NS-I-A36

55

61-245

9.7-49.5

700-1480

71.6

2.0

32

1010

100NS-I-A33

45

56-225

8.2-41.6

700-1480

69.6

1.8

32

1003

80NS-I-A52

160

51-242

22.1-109.8

700-1480

56.3

2.1

21

1456

80NS-I-A42

75

61-204

14.4-70.4

700-1480

66.7

2.5

24

1053

80NS-I-A39

55

57-189

12.4-60.7

700-1480

64.7

2.4

24

1042

80NS-I-A36

45

46-190

9.6-51.4

700-1480

67.7

2.5

24

980

80NS-I-A33

37

43-174

8.0-43.2

700-1480

65.7

2.3

24

973

Details


NS Sludge Pump Model Spectrum

 

    

Application Instruction

1、Starting: please check the whole unit in the following steps before starting:

⑴ The pump should be placed on a firm foundation to bear the whole weight of the pump and eliminate vibration, and all the stone bolts should be screwed tightly.

⑵ Valves of the pipes should have their own supports which shall be firm. The pump flange is provided with seal points, the connecting bolts should not be screwed too tightly, so as to avoid damaging the seal points.

⑶ The shaft is rotated by hands in the rotation direction of the pump; when the shaft rotates, there should not be friction; otherwise the clearance of the impeller should be adjusted.

⑷ The rotation direction of the motor should be checked to ensure that the pump rotates in the arrow direction marked in the pump body.   The reverse rotation should be absolutely prohibited.

⑸ For direct connection drive, the shaft of pump should be centered with the shaft of motor accurately; for belt drive, the shaft of pump should be parallel to the shaft of motor, and the groove wheel should be adjusted to be vertical to the groove belt, so as not to cause vibration and abrasion.

⑹Gland seal should be checked: check water quantity and pressure of the shaft seal, adjust the compression screws on the gland cover, adjust the tight degree of the packing and adjust the gland seal water. It is better that the leakage from the gland cover is drop by drop, for if the packing is too tight, the shaft housing is easy to become hot and the power consumption is high, otherwise, the liquid leakage is too much. The pressure of the gland seal should be 35KPa higher than the outlet pressure of the pump generally, and the quantity of the gland seal should be between 0.15 and 2.1 L/S according to different models generally. The pump provided with the mechanical seal should be supplied with the gland seal water before starting.

2、Operating:

⑴ The pressure and flow rate of the gland seal water should be checked regularly in operation to adjust the gland cover or replace the packing, so as to ensure that there is always a small quantity of clear water passing through the shaft.

⑵ The operating condition of the bearing assembly should be regularly checked; and NO.20 or 30 lubricating oil should be injected in the axis body and cooling water is connected on the hose connector (no need of cooling water if below 18.5kw) before starting. The lubricating oil of the bearing should be clean in right amount, and added and replaced regularly.

⑶ The pump efficiency is reduced when the clearance between the impeller and the guard plate is increased, so the impeller should be adjusted forwards in time to keep certain clearance and ensure high-efficiency operation of the pump. When the pump is worn and cannot meet system demands, the wearing parts should be replaced; the pump should be overhauled regularly to evaluate the service life of the wearing parts, so as to avoid serious results to the system due to failed bearing parts.

3、Stopping the Pump:

Before stopping the pump, the pump should pump and send clear water for a while possibly, so as to clean slurry flowing through the pump; and then the pump, the gate, the gland seal water and the cooling water of the bearing body should be closed in turn.


Maintenance

Routine maintenance should be performed to ensure safe operation and long service life of the pump. The following respects should be noticed in the maintenance:
    
1、Maintenance of the Gland Seal:

The pressure and quantity of the gland seal should be checked regularly to ensure that a small quantity of clear water always flows along the shaft; the gland cover should be adjusted regularly; and the packing should be checked and replaced regularly. The pressure and quantity of the gland seal should accord with the above mentioned (gland seal check) requirements. For pump provided with the mechanical seal and not used for a long time, mechanical seal parts should be filled with N46 machine oil, so as to prevent rustiness of the mechanical seal parts and failure of the inside rubber parts.

2、 Adjustment of the Impeller:

To ensure high-efficiency operation of the pump, the clearance between the impeller and the front guard plate should be adjusted in time. When the clearance of the impeller is adjusted, the pump is stopped firstly, the bolts pressing the bearing assembly tightly are loosened, the nuts on the adjusting bolts are screwed to make the bearing assembly move forward; simultaneously, the shaft is rotated by hands in the rotation direction of the pump until the impeller rubs the front guard plate, the nuts screwed tightly before are loosened by half circle and then screwed tightly, so as to make the bearing assembly move backward; at this time, the clearance between the impeller and the front guard plate is between 0.5 and 1mm. After the adjustment, it should recheck whether the rotation of the impeller is normal, and whether the hold-down bolts of the bearing assembly are screwed tightly before restarting, and then the pump can be started.

3、Lubrication of the Bearing:

The bearing assembly has longer running life if the bearing assembly is correctly assembled, the lubricating oil is added in right amount and the maintenance is performed in time. Maintenance personnel should periodically overhaul the bearing assembly, check the conditions of the bearing assembly and the lubricating oil, and periodically add or replace the lubricating oil in the operation. The time interval and injection amount of the lubricating oil are related with many factors such as rotation of the pump, specification of the bearing, continuous working time, stopping and starting times of the pump, ambient environment and operating temperature, so the maintenance personnel should gradually gather experience to reasonably add the lubricating oil in time.

4、4. For spare pump, its shaft should be rotated 1/4 circle each week, so that the shaft bears even static load and external vibration.

Error Causes and Countermeasures

Faults

Causes

Solutions

Incapability of sucking water of the pump

Air leakage of the suction pipe or the packing position, damage of the impeller, blockage of the suction pipe, unable discharging of the air in the pump, air blockage of the suction pipe, unable realization of water sealing on water outlets of the pump

Plugging the air leakage parts, replacing the impeller, removing the blockage, checking the suction force of the emptying device, moving the suction pipe to discharge the air, lifting or lowering the hoses on the water outlets

Overhigh power of the shaft

Over tight pressing of the packing, heat emission of the packing, friction in the pump, damage of the bearing, large flow rate of the pump, high speed, large medium proportion, no centration of the axes

Loosening the bolts of the gland cover, adjusting the clearance of the impeller, replacing the bearing, adjusting the diameter of the water outlet pipe, lowering the speed, reducing medium concentration, adjusting the axes

Bearing running hot

Excessive or insufficient lubricating oil of bearing, impurities in the lubricating oil, damage of the bearing

Adding the lubricating oil according to the operation instruction, replacing the lubricating oil, replacing the bearing

Short service life of the bearing

Disalignment of power output shaft and the shaft of pump, unbalance of the impeller, foreign matters in the bearing, improper amount of the lubricating oil

Adjusting the concentricity of the power output shaft and the shaft of pump, replacing the impeller, cleaning the bearing or replacing the bearing

Serious leakage on the seals

Serious wear of the packing, serious wear of the shaft housing, damage of the seals or the auxiliary impeller

Replacing the packing, replacing the bearing, replacing the seals or the auxiliary impeller

Large vibration and noise of the pump

Damage of the bearing, unbalance of the impeller, air sucked in the suction pipe, uneven flow rate, empty pumping of the pump

Replacing the bearing, replacing the impeller, removing the air, clearing the blockage


Different Configurations in Different Application Environments

 
 
 
 
   
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