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QDLF Vertical Multistage Centrifugal Pump, Material Cast Iron / Stainless Steel
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I Product characteristics for Vertical Multistage Centrifugal Pump

Structure Of Vertical Multistage Centrifugal Pump
Structure Of Vertical Multistage Centrifugal Pump

  1. Low noise: Install the model number of Y2 electric motor,the circulate is steady,and low noise

  2. Without leakage: Specially selected mechanical seal and science processes a craft,professional technical assurance,carry out the pursue of"without leakage"

  3. Simple to demolish and install: Rigid couplings,spline shaft design,the weight ease 50% than the pumps,and the operability is better

  4. Install is convenient: Enter of water and out of water are on the same level,the Lower to the tube road request,the the and tube road the s usage is more dependable,the stability is higher

  5. The investment of pump - house - building is less: At the orginally foundation of vertical

  6. multistage pump go forward to go an improvement,the the physical volume is small,covering area little

  7. Avoid the second-pollution of the fluid matter: Inducer and shaft are made of stainless steel,overcome the weakness of the cast-iron pump,promise the quality of the fluid matter

  8. Have no rust eclipse harassment: The use cylinder of stainless steel,better adapt various environment,never rusty

  9. The life span is longer: The material hurtles of stainless steel are pressed,the weld impeller,the weight is light,balance good,circulate a stability

  10. Support expenses low: The Adopt the water-lubrication-bearing design,Circulate more dependable,need not to lubriicate to maintain

  11. Efficiently and economize on energy: The More excellent water power model,the smooth of over flow a parts,raised a machine efficiency consumedly

II Performance scope for Vertical Multistage Centrifugal Pump

II Performance scope for Vertical Multistage Centrifugal Pump
II Performance scope for Vertical Multistage Centrifugal Pump

III Product range for Vertical Multistage Centrifugal Pump


  Description

QDL2

QDL4

QDL8

QDL16

QDL32

Rated flow [m3/h]

2

4

8

16

32

Rated flow [1/s]

0.56

1.1

2.2

4.4

8.9

Flow range [m3/h]

1~3.5

1.5~8

5~12

8~22

16~40

Flow range [1/s]

0.28~0.97

0.42~2.2

1.4~3.3

2.2~6.1

4.4~11.1

Max.pressure [bar]

23

21

21

22

26

Motor power [kw]

0.37~3

0.37~4

0.75~7.5

2.2~15

1.5~30

Temperature range [ ]

-15~+120

Max.efficency

46

59

64

70

76

Type






QDL






QDLF






QDL pipe connection






DIN Flange

DN25

DN32

DN40

DN50

DN65

Pipe thread






IV Application scope for Vertical Multistage Centrifugal Pump

QDL/QDLF is a king of multifunctional products. It can be used to convey various medium from tap water to industrial liquid at different temperature and with different flow rate and pressure. QDL type is applicable to conveying-corrosive liquid,QDLF is suiable for slightly Corrosive liquid. Water supply:Water filter and transport in water works, boosting of main pipeline, boosting in high-rise buildings. Industrial boosting:Process fiow water system, cleaning system, High-pressure washing system, fire fighting system.
Industria liquid conveying: Cooling and air-conditiong system, Boiler water supply and condensing system, machine-associated purpose, acids and alkali.
Water treatment:Ulrafitation system, reverse osmosis system, Distillation system, separator, swimming pool
Irrigation:Farmland irrigation, spray irrigation, dripping irrigation.

V Operation conditions for Vertical Multistage Centrifugal Pump

Medium :Thin,clean,noon-flammable and non-explosive liquid containing No solid granules and fibers.
Liquid temperature type:-15 ~+70
Hot water type:+70 ~+120
Ambient temperature:up to +40
Altitude:up to 1000m

VI Vertical Multistage Centrifugal Pump

QDL/QDLF is a kind of vertica non-self priming multistage .Centrifugal pump, which is driven by a standard electric motor. The motor output shaft directly connects with the pump Shaft through a coupling. The pressure-resistant cylinder and flow passage components are fixed between pump head and in-located at the pump bottom at the same plane. This kind of pump can be equipped with an intelligent protector to effectively prevent it from dry-running, out-of-phase and overload

VII Electric motor for Vertical Multistage Centrifugal Pump

Full-enclose air-blast two-pole standard motor. Protection class:IP55;Insulation class:F
Standard voltage:50Hz:1 20-230/240V;3 00-220/346-380V;3 20-240/380-415V;3 80-415V

VII Electric motor for Vertical Multistage Centrifugal Pump

The maximum inlet pressure is the table below. But the actual inlet pressure plus the valve close pressure allowable working pressure


  Model

Max inlet pressure

QDL, QDLF2

QDL,QDLF2-20

6[bar]

QDL,QDLF2-30~2-110

10[bar]

QDL,QDLF-130~2-260

15[bar]

QDL,QDLF4

QDL,QDLF4-20

6[bar]

QDL,QDLF4-30~4-100

10[bar]

QDL,QDLF4-120~4-220

15[bar]

QDL,QDLF8

QDL,QDLF8-20/1~8-60

6[bar]

QDL,QDLF8-80~8-200

10[bar]

QDL,QDLF16

QDL,QDLF16-20~16-30

6[bar]

QDL,QDLF16-40~16-160

10[bar]

QDL,QDLF32

QDL,QDLF32-10-1~32-20-2

3[bar]

QDL,QDLF32-20~32-40

4[bar]

QDL,QDLF32-50-2~32-100

10[bar]

QDL,QDLF32-110-2~32-140

15[bar]

IX Max Working Pressure


  Model

Curve number

QDL,QDLF2

QDL,QDLF2-20~150

1

QDL,QDLF2-180~2-260

2

QDL,QDLF4

QDL,QDLF4-20~4-140

1

QDL,QDLF4-160~4-220

2

QDL,QDLF8

QDL,QDLF8-20/1~8-120

1

QDL,QDLF8-140~8-200

3

QDL,QDLF16

QDL,QDLF16-20~16-80

1

QDL,QDLF16-100~16-160

3

QDL,QDLF32

QDL,QDLF32-10-1~32-70

1

QDL,QDLF32-80-2~32-120

4

QDL,QDLF32-130-2~32-140

5

The following figure shows the limitation of pressure and temperature, which shall be kept within the region as shown in the figure.


limitation of pressure and temperature
limitation of pressure and temperature

X Performance curve

Following conditions are suitable for the performance curves shown bellow
All the performance curves are based on the measured values of a motor 3 80~415V at a constant speed of 2900 rpm.
Curve tolerance in conformity with ISO9906,appendix A.
Measurement is done with 20 air-free water, kater, kinematics viscosity of 1mm2/s.
The operation of pump shall refer to the performance region indicated by the thickened curve to prevent overheating due to too small flow rate or overload of motor due to too large flow rate.

XI NPSH Minimum inlet pressure NPSH

In case that the pressure in pump is lower than the stem pressure used to convey liquid, the capitations will occur. To avoid cavitations, a minimum pressure at the inlet side of the pump shall be guaranteed. The Maximum suction stroke can be calculated with following formula: H=Pb 0.2-NPSH-Hf-Hv-Hs
Pb=atmosphere pressure [bar]
(can be set as 1bar)
In a closed system, Pb means system pressure[bar]
NPSH=Net positive suction head[m]
(It can be read out from the point of possible max, flow rate shown on NPSH curve)
Hf=Pipeline loss at the [m]
Hv=Steam pressure[m]
Hs=Safety margin=Minimum 0.5m delivery head
If the calculated result H is positive, the pump may run under the max. Suction stroke H.
In case the calculated result H is negative, a delivery head of min. Inlet pressure is necessary

XII Operation in parallel

Connecting several pumps in parallel running will benefit much more than running a single large pump. Applicable to different working states necessary in a variable flow system. Increasing the possibility of water supply when the pump is in failure. Because in case of pump failure, only part of the system flow is effected.

Check and ensure that the pump is not at cavitations state.
Check and ensure that the pump is not at cavitations state.

Two pump or more can be connected in parallel running if necessary.
Two pump or more can be connected in parallel running if necessary.

 

QDL/QDLF2

QDL/QDLF2 1
QDL/QDLF2 1

QDL/QDLF2 2
QDL/QDLF2 2

I Section drawing QDL,QDLF2,4 for Vertical Multistage Centrifugal Pump

I Section drawing QDL,QDLF2,4 for Vertical Multistage Centrifugal Pump
I Section drawing QDL,QDLF2,4 for Vertical Multistage Centrifugal Pump

II Material QDL,QDLF2,4


  NO.

Name

Material

AISI ASTM

NO.

Name

Material

AISI ASTM

1

Electric motor



9

Base frame

Cast iron

ASTM25B

2

Electric motor frame

Cast iron

ASTM25B

10

Bearing

Tungsten carbide

AISI304

3

Mechanical seal



11

Impeller

Stainless steel

AISI316

4

Outlet Inducer

Stainless steel

AISI304

12

Shaft

Stainless steel

AISI304

5

Bearing frame Inducer

Stainless steel
  l

AISI304

13

Impeller separating sleeve

Stainless steel

AISI304

6

Inducer

Stainless steel

AISI304

14

Pressure-resistant cylinder

Stainless steel


7

Inlet Inducer

Stainless steel

AISI304

15

Coupling

Carbon steel


8

Pump frame

Stainless steel

ASTM25B


Rubber parts

FPM


III Performance table for QDL/QDLF2

Model

Driving motor(KW)

Q (m3/h)

1

1.2

1.6

2.0

2.4

2.8

3.2

3.5

QDL2-20

0.37

H (m)

18

17

16

15

13

12

10

8

QDL2-30

0.37

27

26

24

22

20

18

15

12

QDL2-40

0.55

36

35

33

30

26

24

20

16

QDL2-50

0.55

45

43

40

37

33

30

24

20

QDL2-60

0.75

53

52

50

45

40

36

30

24

QDL2-70

0.75

63

61

57

52

47

41

35

28

QDL2-90

1.1

80

78

73

67

61

54

45

37

QDL2-110

1.1

98

95

89

82

73

64

54

44

QDL2-130

1.5

116

114

106

98

89

78

65

52

QDL2-150

1.5

134

130

123

112

100

90

73

60

QDL2-180

2.2

161

157

148

136

121

108

91

76

QDL2-220

2.2

197

192

180

165

148

130

110

90

QDL2-260

3.0

232

228

214

198

179

158

130

110

IV Size and weight for QDL/QDLF2


  Model

Size(mm)

Weight(kg)

B1

B2

B1+B2

D1

D2

QDL2-20

220

210

430

148

117

20

QDL2-30

238

210

448

148

117

20

QDL2-40

256

210

466

148

117

20

QDL2-50

274

210

484

148

117

20

QDL2-60

297

245

542

170

142

25

QDL2-70

315

245

560

170

142

25

QDL2-90

351

245

596

170

142

30

QDL2-110

387

245

632

170

142

30

QDL2-130

440

290

730

190

155

35

QDL2-150

476

290

766

190

155

35

QDL2-180

530

290

820

190

155

40

QDL2-220

602

290

892

190

155

45

QDL2-260

682

315

997

197

165

50



QDL/QDLF4

QDL/QDLF4 1
QDL/QDLF4 1

QDL/QDLF4 2
QDL/QDLF4 2

I Section drawing QDL,QDLF2,4 for Vertical Multistage Centrifugal Pump

I Section drawing QDL,QDLF2,4 for Vertical Multistage Centrifugal Pump
I Section drawing QDL,QDLF2,4 for Vertical Multistage Centrifugal Pump

II Material QDL,QDLF2,4


  NO.

Name

Material

AISI ASTM

NO.

Name

Material

AISI ASTM

1

Electric motor



9

Base frame

Cast iron

ASTM25B

2

Electric motor frame

Cast iron

ASTM25B

10

Bearing

Tungsten carbide

AISI304

3

Mechanical seal



11

Impeller

Stainless steel

AISI316

4

Outlet Inducer

Stainless steel

AISI304

12

Shaft

Stainless steel

AISI304

5

Bearing frame Inducer

Stainless steel
  l

AISI304

13

Impeller separating sleeve

Stainless steel

AISI304

6

Inducer

Stainless steel

AISI304

14

Pressure-resistant cylinder

Stainless steel


7

Inlet Inducer

Stainless steel

AISI304

15

Coupling

Carbon steel


8

Pump frame

Stainless steel

ASTM25B


Rubber parts

FPM


III Performance table for QDL/QDLF4

Model

Driving motor(KW)

Q (m3/h)

1.5

2.0

3.0

4.0

5.0

6.0

7.0

8.0

QDL4-20

0.37

H (m)

19

18

17

15

13

10

8

6

QDL4-30

0.55

28

27

26

24

20

18

13

10

QDL4-40

0.75

38

36

34

32

27

24

19

13

QDL4-50

1.1

47

45

43

40

34

31

23

17

QDL4-60

1.1

56

54

52

48

41

37

28

20

QDL4-70

1.5

66

63

61

56

48

43

33

24

QDL4-80

1.5

74

72

70

64

55

50

38

27

QDL4-100

2.2

96

90

87

81

71

62

48

34

QDL4-120

2.2

114

108

104

95

85

75

58

41

QDL4-140

3.0

136

126

122

112

101

89

68

48

QDL4-160

3.0

152

144

140

129

115

101

78

55

QDL4-190

4.0

183

171

168

153

137

122

93

67

QDL4-220

4.0

211

200

192

178

160

138

108

79

IV Size and weight for QDL/QDLF4

Model

Size(mm)

Weight(kg)

B1

B2

B1+B2

D1

D2

QDL4-20

238

210

448

148

117

20

QDL4-30

265

210

475

148

117

20

QDL4-40

297

245

542

170

142

20

QDL4-50

324

245

569

170

142

25

QDL4-60

351

245

596

170

142

25

QDL4-70

395

290

685

190

155

30

QDL4-80

422

290

712

190

155

30

QDL4-100

476

290

766

190

155

30

QDL4-120

530

290

820

190

155

35

QDL4-140

592

315

907

197

165

35

QDL4-160

646

315

961

197

165

40

QDL4-190

727

335

1062

230

188

45

QDL4-220

808

335

1143

230

188

50


QDL/QDLF8

QDL/QDLF8 1
QDL/QDLF8 1

QDL/QDLF8 2
QDL/QDLF8 2

I Section drawing QDL,QDLF8,16 for Vertical Multistage Centrifugal Pump

I Section drawing QDL,QDLF8,16 for Vertical Multistage Centrifugal Pump
I Section drawing QDL,QDLF8,16 for Vertical Multistage Centrifugal Pump

II Material QDL,QDLF8,16


  NO.

Name

Material

AISI ASTM

1

Electric motor



2

Electric motor frame

Cast iron

ASTM25B

3

Mechanical seal



4

Outlet Inducer

Stainless steel

AISI304

5

Bearing frame Inducer

Stainless steel

AISI304

6

Inducer

Stainless steel

AISI304

7

Inlet Inducer

Stainless steel

AISI304

8

Pump frame

Stainless steel

AISI304

9

Base frame

Cast iron

ASTM25B

10

Bearing

Tungsten carbide


11

Impeller

Stainless steel

AISI304

12

Shaft

Stainless steel

AISI316

13

Impeller sleeve

Stainless steel

AISI304

14

Pressure-resistant cylinder

Stainless steel


15

Coupling

Carbon steel



Rubber parts

FPM


III Performance table for QDL/QDLF16

Model

Driving motor(kw)

Q (m3/h)

8

10

12

14

16

18

20

22

QDL16-20

2.2

H(m)

27

26

25

24

22

21

19

16

QDL16-30

3.0

41

40

38

37

34

32

26

25

QDL16-40

4.0

54

53

52

49

46

43

38

34

QDL16-50

5.5

68

67

65

62

58

54

48

43

QDL16-60

5.5

82

80

78

74

70

64

58

52

QDL16-70

7.5

96

95

91

87

82

76

68

61

QDL16-80

7.5

110

108

104

99

94

86

77

70

QDL16-100

11

138

136

131

125

118

109

97

87

QDL16-120

11

166

162

157

150

141

130

116

105

QDL16-140

15

194

190

184

175

166

152

136

122

QDL16-160

15

222

217

210

200

189

174

156

140

IV Size and weight for QDL/QDLF16

Model

Size(mm)

Weight(kg)

B1

B2

B1+B2

D1

D2

QDL16-20

400

290

690

190

155

40

QDL16-30

455

315

770

197

165

50

QDL16-40

500

335

835

230

188

55

QDL16-50

565

430

995

260

208

70

QDL16-60

610

430

1040

260

208

75

QDL16-70

655

430

1085

260

208

80

QDL16-80

700

430

1130

260

20/

80

QDL16-100

820

490

1310

330

255

140

QDL16-120

910

490

1400

330

255

145

QDL16-140

1000

490

1490

330

255

160

QDL16-160

1090

490

1580

330

255

165



QDL/QDLF16

QDL/QDLF16 1
QDL/QDLF16 1

QDL/QDLF16 2
QDL/QDLF16 2

I Section drawing QDL,QDLF8,16 for Vertical Multistage Centrifugal Pump

I Section drawing QDL,QDLF8,16 for Vertical Multistage Centrifugal Pump
I Section drawing QDL,QDLF8,16 for Vertical Multistage Centrifugal Pump

II Material QDL,QDLF8,16


  NO.

Name

Material

AISI ASTM

1

Electric motor



2

Electric motor frame

Cast iron

ASTM25B

3

Mechanical seal



4

Outlet Inducer

Stainless steel

AISI304

5

Bearing frame Inducer

Stainless steel

AISI304

6

Inducer

Stainless steel

AISI304

7

Inlet Inducer

Stainless steel

AISI304

8

Pump frame

Stainless steel

AISI304

9

Base frame

Cast iron

ASTM25B

10

Bearing

Tungsten carbide


11

Impeller

Stainless steel

AISI304

12

Shaft

Stainless steel

AISI316

13

Impeller sleeve

Stainless steel

AISI304

14

Pressure-resistant cylinder

Stainless steel


15

Coupling

Carbon steel



Rubber parts

FPM


III Performance table for QDL/QDLF16

Model

Driving motor(kw)

Q (m3/h)

8

10

12

14

16

18

20

22

QDL16-20

2.2

H(m)

27

26

25

24

22

21

19

16

QDL16-30

3.0

41

40

38

37

34

32

26

25

QDL16-40

4.0

54

53

52

49

46

43

38

34

QDL16-50

5.5

68

67

65

62

58

54

48

43

QDL16-60

5.5

82

80

78

74

70

64

58

52

QDL16-70

7.5

96

95

91

87

82

76

68

61

QDL16-80

7.5

110

108

104

99

94

86

77

70

QDL16-100

11

138

136

131

125

118

109

97

87

QDL16-120

11

166

162

157

150

141

130

116

105

QDL16-140

15

194

190

184

175

166

152

136

122

QDL16-160

15

222

217

210

200

189

174

156

140

IV Size and weight for QDL/QDLF16

Model

Size(mm)

Weight(kg)

B1

B2

B1+B2

D1

D2

QDL16-20

400

290

690

190

155

40

QDL16-30

455

315

770

197

165

50

QDL16-40

500

335

835

230

188

55

QDL16-50

565

430

995

260

208

70

QDL16-60

610

430

1040

260

208

75

QDL16-70

655

430

1085

260

208

80

QDL16-80

700

430

1130

260

20/

80

QDL16-100

820

490

1310

330

255

140

QDL16-120

910

490

1400

330

255

145

QDL16-140

1000

490

1490

330

255

160

QDL16-160

1090

490

1580

330

255

165


QDL/QDLF32

QDL/QDLF32 1
QDL/QDLF32 1

QDL/QDLF32 2
QDL/QDLF32 2

I Section drawing QDL,QDLF32 for Vertical Multistage Centrifugal Pump

I Section drawing QDL,QDLF32 for Vertical Multistage Centrifugal Pump
I Section drawing QDL,QDLF32 for Vertical Multistage Centrifugal Pump

II Material QDL,QDLF32

NO.

Name

Material

AISI ASTM

1

Electric motor fram

Cast iron

ASTM25B

3

Mechanical seal

Tungsten carbide


4

Outlet Inducer

Stainless steel

AISI304

5

Bearing frame lnducer

Stainless steel

AISI304

6

Inducer

Stainless steel

AISI304

7

Inlet lnducer

Stainless steel

AISI304

9

Base frame

Cast iron

ASTM25B

10

Bottom Bearing

Tungsten carbide


11

Impeller

Stainless steel

AISI304

12

Shaft

Stainless steel

AISI316

13

Inermediate-shaft sleeve

Tungsten carbide


14

Pressure-resistant cylinder

Stainless steel

AISI304

15

Coupling

Carbon steel



Rubber parts

FPM


QDL

2

Pump head frame

Cast iron

ASTM25B

8

Pump frame

Stainless steel

AISI304

QDLF

2

Pump head frame

Stainless steel

AISI304

8

Pump frame

Stainless steel

AISI304

III Performance table for QDL/QDLF32

Model

Driving motor(kw)

Q (m3/h)

16

20

24

28

32

36

40

QDL32-10-1

1.5

H (m)

14

13

12

11

9

7

4

QDL32-10

2.2

18

17

15

14

13

11

8

QDL32-20-2

3.0

29

28

26

23

20

16

11

QDL32-20

4.0

36

34

32

29

27

23

18

QDL32-30-2

5.5

47

44

41

38

33

28

21

QDL32-30

5.5

54

51

48

44

40

35

27

QDL32-40-2

7.5

65

62

58

53

46

40

30

QDL32-40

7.5

72

69

65

59

53

47

37

QDL32-50-2

11

83

79

74

68

60

52

41

QDL32-50

11

90

86

81

74

67

59

47

QDL32-60-2

11

101

97

90

83

74

65

51

QDL32-60

11

108

104

97

90

81

72

57

QDL32-70-2

15

119

114

107

98

88

78

60

QDL32-70

15

126

121

113

105

95

85

67

QDL32-80-2

15

136

131

123

114

102

90

71

QDL32-80

15

144

138

130

120

109

97

77

QDL32-90-2

18.5

154

148

140

129

117

102

82

QDL32-90

18.5

162

156

147

136

124

109

88

QDL32-100-2

18.5

175

166

157

146

131

115

91

QDL32-100

18.5

182

173

164

152

138

122

98

QDL32-110-2

22

193

184

173

164

146

128

102

QDL32-110

22

200

191

180

168

153

135

109

QDL32-120-2

22

211

201

189

178

160

140

113

QDL32-120

22

218

208

196

184

167

147

120

QDL32-130-2

30

230

218

206

193

174

153

124

QDL32-130

30

237

225

213

200

181

160

131

QDL32-140-2

30

247

235

222

210

189

165

135

QDL32-140

30

255

242

229

216

196

172

142

IV Size and weight for QDL/QDLF32

Model

Size(mm)

Weight(kg)

B1

B2

B1+B2

D1

D2

QDL32-10-1/QDL32-10

505

290

795

190

155

68/71

QDL32-20-2/QDL32-20

575

315/335

890/910

197/230

165/188

78/84

QDL32-30-2/QDL32-30

645

430

1075

260

208

93

QDL32-40-2/QDL32-40

715

430

1145

260

208

102

QDL32-50-2/QDL32-50

890

490

1380

330

255

172

QDL32-60-2/QDL32-60

960

490

1450

330

255

176

QDL32-70-2/QDL32-70

1030

490

1520

330

255

188

QDL32-80-2/QDL32-80

1100

490

1590

330

255

192

QDL32-90-2/QDL32-90

1170

550

1720

330

255

218

QDL32-100-2/QDL32-100

1240

550

1790

330

255

222

QDL32-110-2/QDL32-110

1310

590

1900

360

285

259

QDL32-120-2/QDL32-120

1380

590

1970

360

285

263

QDL32-130-2/QDL32-130

1450

660

2110

400

310

327

QDL32-140-2/QDL32-140

1520

660

2180

400

310

331

 


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