D series (D, DG, DY, DM, DF) pumps

 Multistage centrifugal pump     |      2017/3/21 18:19:45

Summary

D series (D, DG, DY, DM, DF) pumps are single suction, segmental centrifugal pumps.

Performance range:

Flow: Q: 6-540m3/h

Head: H:33~1056m

Axial force balance disk balance, except 85-67, 155-67, 45-80, 85-80, 150-100 pumps using sliding bearings, thin oil lubrication, the rest are using rolling bearings, grease lubrication.

Pump steering: The special purpose of the pump is clockwise rotation from the prime mover end.

The motor and the base of the pump can be supplied as a complete set (the base can be divided into two kinds of work or itself).


According to different uses, D series can be divided into;

D: It is suitable for transporting clear water without solid particles or liquids similar to clear water in physical and chemical properties. The temperature of the transported medium is 0~80 C. The suction port of the pump is horizontal, and the outlet of the pump is vertical upward.

DM: It is suitable for transporting liquid with a small amount of solid particles and similar physical and chemical properties to clear water. The temperature of the transported medium is 0~80 C. The suction port of the pump is horizontal and the outlet of the pump is vertical upward.

DG: It is suitable for transporting clear water without solid particles or objects with physical and chemical properties similar to clear water. The temperature of the transported medium is - 20 ~150 C. The suction and vomiting outlets of the pump are vertical upward.

DY: It is suitable for transporting petroleum products without solid particles or other liquids similar to water. The temperature of the transported medium is -20 C~+400 C. The suction outlet and vomiting outlet of the pump are vertical upward.

DF: It is suitable for conveying corrosive liquids without solid particles. The temperature of the medium being conveyed is - 20 ~150 C. The inlet and outlet of the pump are vertical upward.

All types of pumps above can be sealed with mechanical seals or soft fillers according to user's requirements. Cast iron, bronze, stainless steel or common carbon steel can be used as materials for overflow components.

Model description:

Case 1: D280-43/84*5

D-Indicates single-suction, multi-suction, segmental centrifugal water pump

280 - Indicates the design point flow rate of the pump (m2/h)

43 - Indicates the design point of the pump, single stage head (m)

84 - Represents the design year of the pump

5 - Represents pump series

Case 2: 150D30 *5

150 - Indicates the diameter of the suction port of the pump (mm)

D-Indicates single-suction, multi-suction, segmental centrifugal water pump

30 - Represents the design point of the pump with a 30-stage head (m)

5 - Represents pump series


d1.png

D-type pump (medium and low pressure) structure diagram (water seal water from the outlet of the first stage impeller)


 

d2.png 

 

 

D-type pump (medium and low pressure) structure diagram (water seal water refers to external water)


 

d3.png 


 

 

d4.png


 Performance data


Type of pump


Capacity


Head


Rotation

speed


Brake

power

 Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)


Power(kw)


Model

η(%)

(m)

D46-50×4

28

230

2980

33.1

45

Y YB225M-2

53

2.5

46

200

39.8

63

2.8

50

192

41.3

63.2

3.0

D46-50×5

28

287.5

2980

41.4

75

Y YB280S-2

53

2.5

46

250

49.8

63

2.8

50

240

51.6

63.2

3.0

D46-50×6

28

345

2980

49.6

75

Y YB 280S-2

53

2.5

46

300

59.7

63

2.8

50

288

61.9

63.2

3.0

D46-50×7

28

402.5

2980

57.9

90

Y YB280M-2

53

2.5

46

350

69.9

63

2.8

50

336

72.2

63.2

3.0

D46-50×8

28

460

2980

66.2

90

Y YB280M-2

53

2.5

46

400

79.6

63

2.8

50

384

82.6

63.2

3.0

D46-50×9

28

517.5

2980

74.4

110

Y YB315S-2

53

2.5

46

450

89.6

63

2.8

50

432

92.9

63.2

3.0

D46-50×10

28

575

2980

82.9

132

Y YB315M-2

53

2.5

46

500

99.5

63

2.8

50

480

103.2

63.2

3.0

D46-50×11

28

632.5

2980

91.0

132

Y YB315M-2

53

2.5

46

550

109.5

63

2.8

50

528

113.5

63.2

3.0

D46-50×12

28

690

2980

99.3

160

Y YB315L1-2

53

2.5

46

600

119.4

63

2.8

50

576

123.9

63.2

3.0

D85-67×3

55

222

2980

61.5

90

Y YB280M-2

54

3.3

85

201

71.5

65

4.0

100

183

76.6

65

4.4

D85-67×4

55

296

2980

82.1

110

Y YB315S-2

54

3.3

85

268

95.4

65

4.0

100

244

102.2

65

4.4



Performance data


Type of pump


Capacity


Head


Rotation

speed


Brake

power

 Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)

功率

Power(kw)

型号

Model

η(%)

(m)

D85-67×5

55

370

2980

102.5

160

Y YB 315L1-2

54

3.3

85

335

119.3

65

4.0

100

305

127.7

65

4.4

D85-67×6

55

444

2980

123.1

160

Y YB315L1-2

54

3.3

85

402

143.1

65

4.0

100

365

152.8

65

4.4

D85-67×7

55

518

2980

143.6

200

Y YB 315L2-2

54

3.3

85

469

166.9

65

4.0

100

427

178.6

65

4.4

D85-67×8

55

592

2980

164.1

220

Y YB355M1-2

54

3.0

85

536

190.8

65

4.0

100

488

204.3

65

4.4

D85-67×9

55

666

2980

184.6

250

Y YB355M2-2

54

3.0

85

603

214.6

65

4.0

100

549

230.0

65

4.4

D85-80×7

54

616

2950

170.9

250

Y YB355M1-2

(1P23)

53

4.5

85

560

199.3

65

4.4

108

490

218.4

66

5.3

D85-80×8

54

704

2950

195.3

280

Y YB355M2-2

(1P23)

53

4.5

85

640

227.8

65

4.4

108

560

249.6

66

5.3

D85-80×9

54

792

2950

219.8

315

Y YB355M3-2

(1P23)

53

4.5

85

720

256.3

65

4.4

108

630

280.2

66

5.3

D85-80×10

54

880

2950

244.2

355

Y YB355L1-2

(1P23)

53

4.5

85

800

284.8

65

4.4

108

700

311.9

66

5.3

D85-80×11

54

968

2950

268.6

400

Y YB3556-2

(1P23)

53

4.5

85

880

313.2

65

4.4

108

770

343

66

5.3

D85-80×12

54

1056

2950

293

450

Y YB4001-2

(1P23)

53

4.5

85

960

341.7

65

4.4

108

840

347.3

66

5.3

 Performance data


Type of pump


Capacity


Head


Rotation

speed


Brake

power

 Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)


Power(kw)


Model

η(%)

(m)

100D-16×3

37.6

59.4

2980

9.21

15

Y YB160M2-2

66

3.7

54.0

51

10.27

73

3.9

72.0

33.6

9.9

66

4.3

100D-16×4

37.6

79.2

2980

12.28

15

Y YB160M2-2

66

3.7

54.0

68

13.68

73

3.9

72.0

44.8

13.32

66

4.3

100D-16×5

37.6

99

2980

15.35

22

Y YB180M-2

66

3.7

54.0

85

17.10

73

3.9

72.0

56

16.65

66

4.3

100D-16×6

37.6

118.8

2980

18.64

22

Y YB180M-2

66

3.7

54.0

102

20.25

73

3.9

72.0

67.2

19.98

66

4.3

100D-16×7

37.6

138.6

2980

21.49

30

Y YB200L1-2

66

3.7

54.0

119

23.94

73

3.9

72.0

78.4

23.31

66

4.3

100D-16×8

37.6

158.4

2980

24.56

30

Y YB200L1-2

66

3.7

54.0

136

27.63

73

3.9

72.0

89.6

26.64

66

4.3

100D-16×9

37.6

178.2

2980

27.63

37

Y YB200L2-2

66

3.7

54.0

153

30.78

73

3.9

72.0

100.8

29.97

66

4.3

125D-16×3

72

76.8

2980

21.3

30

Y YB200L1-2

70.5

3.2

101

64.5

22.8

77.5

3.9

119

52.5

22.95

74.5

4.5

125D-16×4

72

102.4

2980

28.4

37

Y YB 200L2-2

70.5

3.2

101

86.0

30.4

77.5

3.9

79

70.0

30.6

74.5

4.5

125D-16×5

72

128.0

2980

35.5

45

Y YB225M-2

70.5

3.2

101

107.5

38.0

77.5

3.9

119

87.5

38.3

74.5

4.5

125D-16×6

72

153.6

2980

42.6

55

Y YB250M-2

70.5

3.2

101

129.0

45.6

77.5

3.9

119

105.0

46

74.5

4.5


 Performance data


Type of pump


Capacity


Head


Rotation

speed


Brake

power

 Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)


Power(kw)


Model

η(%)

(m)

125D-16×7

72

179.2

2980

49.8

75

Y YB280S-2

70.5

3.2

101

150.5

53.2

77.5

3.9

119

122.5

53.6

74.5

4.5

125D-16×8

72

204.8

2980

56.8

75

Y YB280S-2

70.5

3.2

101

172.0

61.8

77.5

3.9

119

140.0

61.2

74.5

4.5

125D-16×9

72

230.4

2980

63.9

90

Y YB280M-2

70.5

3.2

101

193.5

98.4

77.5

3.9

119

157.5

68.9

74.5

4.5

150D-30×3

(D155-30/80×4)

119

98.1

1480

43.05

75

Y YB280S-4

74

2.8

155

92.1

50.5

77

3.5

190

84.0

58.06

75

4.7

150D-30×4

(D155-30/80×4)

119

130.8

1480

57.4

90

Y YB280M-4

74

2.8

155

122.8

67.3

77

3.5

190

112.0

77.3

75

4.7

150D-30×5

(D155-30/80×4)

119

163.5

1480

71.6

110

Y YB 315S-4

74

2.8

155

152.5

83.6

77

3.5

190

140.0

96.6

75

4.7

150D-30×6

(D155-30/80×4)

119

196.2

1480

85.9

132

Y YB315M1-4

74

2.8

155

184.2

101

77

3.5

190

168.0

116

75

4.7

150D-30×7

(D155-30/80×4)

119

228.9

1480

100.4

160

Y YB315M2-4

74

2.8

155

214.9

118

77

3.5

190

196.0

135.5

75

4.7

150D-30×8

(D155-30/80×4)

119

261.6

1480

114.6

200

Y YB315L2-2

74

2.8

155

245.6

134.7

77

3.5

190

224.0

154.6

75

4.7

150D-30×9

(D155-30/80×4)

119

294.3

1480

128.9

200

Y YB315L2-4

74

2.8

155

276.3

151.5

77

3.5

190

252.0

173.9

75

4.7

150D-30×10

(D155-30/80×4)

119

327

1480

143.2

220

Y YB355M1-4

74

2.8

155

307

158.3

77

3.5

190

280

193.2

75

4.7


Performance data


Type of pump


Capacity


Head


Rotation

Speed

 

 

 

speed


Brake

power

 Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)


Power(kw)


Model

η(%)

(m)

DG150-100×6

120

630

2950

307

450

Y YB4001-2

(1P23)

67

3.4

150

591

345

70

4.8

180

540

368

72

5.5

DG150-100×7

120

735

359

500

Y YB4002-2

(1P23)

67

3.4

150

698.5

403

70

4.8

180

630

429

72

5.5

DG150-100×8

120

840

410

630

Y YB4004-2

(1P23)

67

3.4

150

788

460

70

4.8

180

720

491

72

5.5

DG150-100×9

120

945

461

630

Y YB4004-2

(1P23)

67

3.4

150

886.5

518

70

4.8

180

810

552

72

5.5

DG150-100×10

120

1050

512

800

Y YB4502-2

(1P23)

67

3.4

150

985

575

70

4.8

180

900

613

72

5.5

D

DG155-67×3

DF

95

228

2980

93.6

132

Y YB315M-2

63

2.6

155

201

114.7

74

4.5

185

177

122.1

73

5.7

D

DG155-67×4

DF

95

304

2980

124.8

185

Y YB315M1-2

(IP23)

63

2.6

155

268

152.9

74

4.5

185

236

162.8

73

5.7

D

DG155-67×5

DF

95

380

2980

156

220

Y YB355M1-2

63

2.6

155

335

191.1

74

4.5

185

295

203.6

73

5.7

D

DG155-67×6

DF

95

456

2980

187.2

280

Y YB355L1-2

63

2.6

155

402

229.3

74

4.5

185

354

244.3

73

5.7

D

DG155-67×7

DF

95

532

2980

218.4

315

Y YB355L2-2

63

2.6

155

469

267.6

74

4.5

185

413

285

73

5.7

D

DG155-67×8

DF

95

608

2980

249.6

355

Y YB355L1-2

(1P23)

63

2.6

155

536

305.8

74

4.5

185

472

325.7

73

5.7

D

DG155-67×9

DF

95

684

2980

280.8

400

Y YB3556-2

(6KV)

63

2.6

155

603

344

74

4.5

185

531

366.4

73

5.7

DG280-43/84×9

(200D-43×3)

190

135.9

1480

96.3

160

Y YB315L1-4

73

3.0

288

122.4

120

80

4.7

346

111

134

83

6.0


 Performance data


Type of pump


Capacity


Head


Rotation

speed


Brake

power

Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)


Power(kw)


Model

η(%)

(m)

D280-43/84×4

(200D-43×4)

190

181.2

1480

128.4

200

Y YB315L2-4

73

3.0

288

163.2

160.0

80

4.7

346

148

178.8

78

6.0

D280-43/84×5

(200D-43×5)

190

226.5

1480

160.5

250

Y YB355M2-4

73

3.0

288

204

200.0

80

4.7

346

185

223.5

78

6.0

D280-43/84×6

(200D-43×6)

190

271.8

1480

192.7

280

Y YB355L1-4

73

3.0

288

244.8

240.0

80

4.7

346

222

268.2

78

6.0

D280-43/84×7

(200D-43×7)

190

317.1

1480

224.8

355

Y YB355L1-4

(IP23)

73

3.0

288

285.6

280.0

80

4.7

346

259

312.8

78

6.0

D280-43/84×8

(200D-43×8)

190

362.4

1480

256.9

450

Y YB4003-4

(1P23)

73

3.0

288

326.4

320.0

80

4.7

346

296

357.6

78

6.0

D280-43/84×9

(200D-43×9)

190

 407.7

1480

289.0

450

Y YB4003-4

(1P23)

73

3.0

288

367.2

360

80

4.7

346

333

402.3

78

6.0

D280-65/84×3

(200D-65×3)

210

209.1

1480

186.8

280

Y YB355L1-4

61

2.8

280

198.75

215.2

73

3.7

340

184.3

240.2

75

5

D280-65/84×4

(200D-65×4)

210

278.8

1480

249.1

355

Y YB355L1-4

(IP23)

61

2.8

280

265

287.0

73

3.7

340

245.6

320.0

75

5

D280-65/84×5

(200D-65×5)

210

348.6

1480

311.4

450

Y YB4003-4

(IP23)

61

2.8

280

331.25

358.8

73

3.7

340

307

400.3

75

5

D280-65/84×6

(200D-65×6)

210

418

1480

378.6

500

Y YB4004-4

(1P23)

61

2.8

280

397.5

430.5

73

3.7

340

368.4

480.74

75

5

D280-65/84×7

(200D-65×7)

210

487.9

1480

436.0

630

Y YB4501-4

(1P23)

61

2.8

280

463.75

  502.3

73

3.7

340

429.8

560.4

75

5


Performance data


Type of pump


Capacity


Head


Rotation

speed


Brake

power

Motor


Efficiency


(NPSH)r

Q(m3/h)

H(m)

N(r/min)

P(kw)


Power(kw)


Model

η(%)

(m)

D280-65/84×8

(200D-65×8)

210

557.6

1480

498.2

710

Y YB4502-4

(1P23)

61

5.8

280

530

574.0

73

3.7

340

491.2

640.5

75

5

D280-65/84×9

(200D-65×9)

210

627.3

1480

560.5

800

Y YB4503-4

(1P23)

61

5.8

280

596.5

645.8

73

3.7

340

552.6

720.6

75

5

D280-65/84×10

(200D-65×10)

210

697

1480

622.8

900

Y YB4504-4

(1P23)

61

5.8

280

662.5

717.5

73

3.7

340

614

800.6

75

5

D450-60/84×3

(250D-60×3)

360

184.6

1480

259.5

355

Y YB355L1-4

(IP23)

69.8

3

450

175.1

286.1

75

4

540

164.3

310.6

78

5.6

D450-60/84×4

(250D-60×4)

360

246.1

1480

345.6

500

Y YB4004-4

(1P23)

69.8

3

450

233.5

381.6

75

4

540

219.0

412.9

78

5.6

D450-60/84×5

(250D-60×5)

360

307.7

1480

432.4

630

Y YB4501-4

(1P23)

69.8

3

450

291.9

476.9

75

4

540

273.8

516.2

78

5.6

D450-60/84×6

(250D-60×6)

360

369.2

1480

518.5

630

Y YB4501-4

(1P23)

69.8

3

450

350.3

572.3

75

4

540

328.5

621.2

78

5.6

D450-60/84×7

(250D-60×7)

360

430.7

1480

605.4

800

Y YB4503-4

(1P23)

69.8

3

450

408.6

667.6

75

4

540

383.6

724.7

78

5.6

D450-60/84×8

(250D-60×8)

360

492.2

1480

691.5

900

Y YB4504-4

(1P23)

69.8

3

450

467.0

703.0

75

4

540

438.0

828.2

78

5.6

D450-60/84×9

(250D-60×9)

360

553.8

1480

778.4

1000

Y YB5001-4

(1P23)

69.8

3

450

525.4

858.4

75

4

540

492.8

931.7

78

5.6

D450-60/84×10

(250D-60×10)

360

615.3

1480

864.9

1120

Y YB5002-4

(1P23)

69.8

3

450

583.8

953.8

75

4

540

547.5

1038.3

78

5.6


Dimensional Drawing of D-type Pump Shape Installation (Common Base)

The overall dimensions(common base)

d5.png 

 

 

Dimensional Drawing of D-type Pump Shape Installation (Its Base)

The overall dimensions(common base)

d6.png 

 

In particular:

When using this series of pumps, the shaft seal must be connected with water seal. There are two kinds of water seal used: one is the effluent of the first impeller, the other is the introduction of external water. All the water seal mentioned in Table 1 is the introduction of external water as water seal. Unmarked water intake is sealed by the effluent of the first stage impeller. The packing tightness of the shaft seal must be appropriate, when the liquid can seep out drop by drop. When the temperature of the medium being transported is higher than 80 C, cooling water must be injected into the water-cooled packing cap and shaft seal cooling chamber. The cooling water and the water seal water quoted from outside are clean water at room temperature, and the water pressure of the cooling water is 1.5-1 kg/square centimeter. The position of pipe interface of water seal and cooling water in shaft seal cooling chamber of each type of pump is different. The position of pipe interface along the axis of the interface can be seen in the pump structure diagram, and the radial position can be seen in Table 1.


Table 1--Pump Structure Diagram


d7.png 


Balancing mechanism

The balance mechanism consists of balance ring, balance sleeve, balance plate and balance pipeline.

Bearing part:

Bearing part is mainly composed of bearing body and bearing. This type of pump bearing is composed of sliding bearing and rolling bearing. Bearings do not bear the axial force, the pump in operation, the rotor part in the pump body should be free to move axially, can not use centripetal ball bearings.

Sealing and Cooling of Pump

Molybdenum disulfide grease is applied to seal the joint surface of the front, middle, rear and guide vanes in the shell part. The rotor part and the fixed part are sealed by sealing rings, guide vane sleeves, packing, etc. When the wear degree of the sealing ring and guide vane sleeve has affected the work and performance of the pump, it should be replaced in time. In the use of this type of pump, the position of packing rings should be placed correctly. The distribution of packing rings of each type of pump is shown in the table.


d8.png 


Installation and disassembly of pumps:

(1) Component assembly:

1. Clean and wipe all parts.

2. Install the sealing ring on the impeller.

3. Install the guide vane on the guide vane, and then install the guide vane on all the middle sections.

4. Install the guide vanes in the outlet section, double-headed bolts on the lime, and packing or machine sealing caps.

5. fill the parts of the water return pipe.

6. Put impeller on the shaft and install impeller files.

(2) Assembly:

1. Insert the shaft into the outlet section and install the inlet section.

2. Install the middle part of the guide vane, then install the second key, impeller and impeller files. Repeat the above steps until all the keys, impeller, impeller files and the middle part are completed.

3. Tighten the intake, middle and outlet sections together with tension bolts.

4. Install the water jacket bearing, install the bearing body on the outlet and inlet sections, and fasten the bolts.

5. Inject proper amount of butter into the bearing body and cover the paper pad on the bearing cover. Install the bearing cover on the bearing body and fasten it with bolts. Install pump coupling. Manual disc is used to move the rotor to check whether the rotor is flexible or not.

6. Install the motor on the motor base and fasten it with bolts.

7. Install the parts of the filling water supply pipe on the pump. If the fixed shaft seal is a mechanical seal, the drainage hose for mechanical seal drainage should also be installed.

8. Install coupling pin and packing. Install vent valve and all square bolts. Pump disassembly is carried out in the opposite steps described above.

(3) Matters needing attention in assembly:

The assembly quality of this type of pump directly affects the normal operation of the pump, and affects the life and performance parameters of the pump. Affect the vibration and noise of the unit. Attention should be paid to the following points in assembly:

A. The concentricity of each part of the fixed part is guaranteed by the manufacturing accuracy and assembly quality of the parts. The neutrality of the runner directly affects the performance of the pump, and it is not allowed to touch or scratch. Molybdenum disulfide used as sealant should be clean. Strong bolts and bolts should be uniformly loaded.

B. The neutrality of impeller outlet runner and guide vane inlet runner is guaranteed according to the axial dimension of each part. The neutrality of the runner directly affects the performance of the pump, so the size of the pump can not be adjusted at will.

C. After the assembly of the pump, before the packing is installed, the pump rotor is rotated by hand to check whether the housing of the rotor is flexible and whether the axial channeling momentum meets the required requirements.

D. After the above inspection meets the requirements, the filler is added to the shaft seals at both ends of the pump, and the relative position of the filler ring in the filler is noticed.


Pump Installation

1. Check the intact condition of pump and motor before installation.

2. Check pump foundation and prepare lifting tools. Pumping room should be ventilated, not allowed to sunlight and rain.

3. Place the pump on the base of the cushion 30-40 mm high, ready to fill the cement slurry.

4. Make alignment and wear the foot bolts properly. Filling cement mortar.

5. After 3-5 days of cement drying, re-align and tighten the anchor bolts.

6. Pre-test bottom valve tightness, install inlet and outlet pipelines and valves.

7. Pressure gauges should be installed at the outlet of the pump to observe and control the operation of the pump.

8. In addition to meeting the general installation technical requirements, the following points should be paid attention to when installing this type of pump.

A. When the motor and pump are assembled, the end axle of the pump coupling should be extended outward, and the axial clearance between the pump and the motor coupling should be guaranteed.

B. Pump and motor axes should be in the same horizontal straight line.

C. Pumps can only withstand their own pressure and can not withstand any pressure.


Starting, running, stopping and maintenance of pumps

1. Clean up the surrounding of the pump.

2. Add calcium-based butter into the bearing. Hand-disc rotor should be flexible without grinding phenomenon.

3. Turn on the motor and check whether the motor steering is in accordance with the pump.

4. Open the vent valve at the outlet flange and pour water into the pump or use a vacuum pump to divert water.

5. Close the gate valve and pressure gauge cock on the exhaust pipe.

6. After the above work, start the motor and open the pressure gauge cock.

7. When the pump rotates at normal speed, when the pressure is displayed on the pressure gauge, open the vacuum gauge cock and gradually open the outlet gate valve until the required pressure is reached.

8. In operation, the bearing temperature of the pump shall not exceed the external temperature of 35 C, and its limit temperature shall not exceed 75 C. Butter is injected into bearings with a high-pressure gun every 500 hours of operation.

9. The normal leakage degree in packing room or sealing room should be 30-60 drops per minute. The pressure degree of packing cover or mechanical seal cover should be adjusted at any time.

10. Check coupling regularly and pay attention to bearing temperature rise.

11. When the pump stops, the gate valve in the outlet pipeline should be closed, the vacuum gauge cock should be closed, and the motor should be stopped, then the pressure gauge cock should be closed.

12. When abnormal noise is found in the rotation of the pump, it should be stopped immediately to check its cause.

13. In the cold winter season, if the pump is shut down for a short time, the quadrangular snail race on the intake section should be unscrewed. Release the stored water to avoid freezing and cracking of the pump.

14. After long-term use of the pump, if the flow pressure has significantly decreased, the pump should be dismantled for inspection and replacement of its vulnerable parts.

15. When the pump is stopped for a long time, the pump should be disassembled, the water of the pump parts should be wiped dry, the rust scale removed, and the rust-proof grease coated, and then re-installed and properly preserved.


Possible failures and other solutions

fault

Reason

solution

1.Pump does not absorb water, pressure gauge and vacuum gauge pointer fluctuate violently.

Insufficient irrigation water. Leakage occurs at the connection between the pipeline and the instrument.

Check whether the bottom valve is leaking, and then fill the water to tighten the leak.

2. The water pump does not absorb water. The vacuum meter indicates a high vacuum.

The bottom valve has not been opened or blocked, and the resistance of the suction pipeline is too large. Water absorption is too high.

Check the bottom valve and replace the suction pipe to reduce the suction height.

3. Pressure gauge has pressure, but still does not water.

The outlet pipe has too much resistance. The direction of rotation is not right. Impeller blockage, pump speed is not fast.

Check or shrink the short water pipe and check the electricity. Clean impeller, increase pump speed.

4. Flow rate is lower than design requirement.

The pump is blocked, the seal ring is worn too much and the speed is insufficient.

Clean up the pump and pipeline, replace the sealing ring to increase the speed.

5. The pump consumes too much power.

Packing pressure is too tight, and heat, impeller wear, pump flow increased.

Tell the packing cover to check whether the pump shaft is bent, change the impeller, and increase the outlet resistance. Reduce flow.

6. The sound inside the pump is abnormal and the pump can't get water.

The resistance of the suction pipe is too large, there is air infiltration at the suction point, and the temperature of the liquid transported is too high.

Maintenance and water pipes, check bottom valves, reduce water absorption height, fill leaks, reduce temperature.

7. Vibration of pump and overheating of bearing.

Motor and pump are not centrifugal, bearing oil shortage or wear.

Adjust the motor and pump to align the center, refuel or change the bearing.


 

! Cautions in Use


1. The pump balances the axial force by the internal balancing mechanism. The balancing device has balanced fluid outflow. The balancing fluid has a balanced pipe connected to the suction section or a short pipe outside the balancing room. The balanced fluid flows out of the pump through the short pipe. In order to ensure the normal operation of the pump, the balancing pipe must not be blocked.

2. There is no cooling device for the hydraulic bearings of this type of pump. The assembly quality of the pump should not be higher than 35 C in the case of bearing temperature change, and the maximum temperature should not be higher than 75 C.

3. The rotor of this type of pump has certain axial movement in operation, so the clearance between the motor and the coupling surface should be guaranteed.

4. Pumps should regularly inspect impellers, sealing rings, guide vane bushes, balancing discs, bushes and wear during operation, and should be replaced in time when excessive wear occurs.

5. Fine operating procedures should be worked out according to specific conditions in use.


Complete range of supply

Supply Range of Complete set

1. Pumps

2. The prime mover can be equipped with explosion-proof motor, ordinary motor, steam turbine or diesel engine according to user's needs.

3. Base and foot bolts (as required)

4. Coupling and coupling cover

5. Pipeline system or accessories with partial cooling and sealing, not for auxiliary pumps

Instructions for Order

Ordering Instructions

1. Pump specifications, materials, cooling and sealing pipeline systems and prime movers shall be determined in accordance with operating conditions. When ordering, flow rate, head, inhalation pressure, density, temperature and medium should be provided. Flammability, explosiveness, toxicity, corrosiveness, crystallinity of medium and whether liquid seal is allowed to infiltrate into medium should be pointed out.

2. If there are special requirements for the prime mover, the user should specify the site conditions, ambient temperature and humidity, installation location and type (explosion-proof, fire-proof and other requirements) voltage size.

3. If the user needs to choose the shaft seal, the manufacturer will decide the type, specifications and materials of the supply according to the conditions of use when ordering. It can also supply according to the user's requirements.

4. The above requirements are all written on the Data Sheet.

PREV:没有了!