3GN(3QGB) series three-screw pump

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Keyword: 3GN(3QGB) series three-screw pump

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Details

Overview

The three-screw pump is a type of positive displacement pump, characterized by a simple structure, small size, high allowable speed, smooth and reliable operation, low pressure pulsation, and small flow accumulation. It operates on the principle of screw engagement, relying on the rotating screws to engage with each other within the pump casing, drawing the conveyed medium in and sealing it within the engagement chamber, and pushing it uniformly towards the discharge port along the screw axis, thereby forming stable pressure at the discharge port.

The three-screw pump is only suitable for transporting lubricating liquids without solid particles at normal temperatures and can be used as a general delivery pump or a pressure supply pump in hydraulic transmission systems. The 3QGB series insulated high-viscosity three-screw pump developed by our company after years of research optimizes the fit between the screws and the pump casing, as well as between the main screw and the auxiliary screw, allowing it to transport high-temperature and high-viscosity media.

The 3QGB series insulated high-viscosity three-screw pump is mainly used for transporting high-viscosity lubricating liquids, commonly used as a delivery pump for asphalt, heavy fuel oil, heavy gear oil, and heavy diesel. The pump is equipped with an insulation chamber and insulation channels, allowing gas or liquid to act as a heat carrier, with a maximum working temperature of ≤350°C. High-viscosity media are generally transported after heating to reduce viscosity, with a typical transport viscosity of 3.0~760 mm/s.

Our company's 3QGB series insulated high-viscosity three-screw pump models range from inlet and outlet diameters DN40 to DN300, with flow rates from 2.8m/h to 300m/h, providing a full range of models to meet different customer needs.

 

Model code

shanggui

 

The following data should be provided when placing an order:

· Characteristics of the medium (temperature, corrosion, etc.)

· Viscosity of the medium at working temperature

· Inlet and outlet pressure of the pump

· Working flow rate of the pump

· Installation type of the pump

· Matching requirements

Key points for pump selection: Choose an appropriate pump speed based on the viscosity of the oil to ensure that the pump's NPSHR meets the actual suction conditions of the user. If the medium viscosity exceeds 760 mm/s, please contact our factory for assistance in pump selection.


The BJ643H series pneumatic insulated three-way valve is a supporting component for the three-screw pump.

 

Based on the characteristics of high-viscosity asphalt, the company has developed the BJ643H series pneumatic insulated three-way valve for transporting high-temperature asphalt, incorporating advanced ideas from both domestic and international sources, significantly improving the production efficiency of asphalt systems in asphalt mixing equipment in China.

The BJ643H series pneumatic insulated three-way valve features a flange connection structure, with the valve body made of cast steel. The valve core is made of aluminum alloy, which automatically adjusts and repairs itself according to the stainless steel sealing surface of the valve body during use, thereby extending its service life. The cylinder and piston are custom-designed according to valve parameters to ensure optimal opening and closing of the valve, further extending its service life. The column and valve rod are made of stainless steel to ensure that the valve does not corrode in harsh environments and can operate normally. The spring installed on the piston rod not only ensures the valve operates between 0.3MPa and 1.0MPa pressure but also provides a buffering effect, protecting the valve core and piston, while also sealing the oil return circuit in case of cylinder air loss.

The BJ643H series pneumatic insulated three-way valve utilizes the piston to form two sealed chambers in the cylinder, achieving valve opening and closing through the pressure difference between the two sealed chambers. Additionally, limit switches are equipped on the upper and lower covers of the cylinder, ensuring the displacement of the valve core and enabling automated control.

Appearance and installation dimensions of the BJ643H series pneumatic insulated three-way valve

 

Basic technical parameters table for the 3GN(3QGB) series three-screw pump

Pump Size

Flow Rate

Pressure

Pressure MPa

Rotate Speed

Rotate Speed

r/min

Power kW

Required NPSHr

m

Motor Size

m³/h

L/min

Shaft Power

Motor Power

 

 

 

 

45×3-36

2.99

49.89

0.6

 

 

950

0.68

1.1

 

 

 

 

5

90L-6-B3

2.90

48.26

1.0

1.15

1.5

100L-6-B3

2.80

46.64

1.6

1.83

3

132S-6-B3

2.54

42.29

2.5

2.80

4

132M1-6-B3

4.57

76.16

0.6

 

 

1450

1.03

1.5

90L-4-B3

4.42

73.68

1.0

1.73

2.2

100L1-4-B3

4.27

71.20

1.6

2.80

3

100L2-4-B3

3.87

64.58

2.5

4.31

5.5

132S-4-B3

 

 

 

45×2-46

4.28

71.28

0.6

 

950

1.03

1.5

 

 

 

5

100L-6-B3

4.14

68.96

1.0

1.72

2.2

112M-6-B3

4.00

66.63

1.6

2.80

4

132M1-6-B3

6.53

108.8

0.6

 

1450

1.75

2.2

100L1-4-B3

6.32

105.3

1.0

2.61

3

100L2-4-B3

6.10

1017

1.6

3.75

5.5

132S-4-B3

 

 

55×2-46

7.81

130.2

0.6

 

950

1.42

2.2

 

 

5

112M-6-B3

7.55

125.9

1.0

2.53

4

132M1-6-B3

11.7

194.5

0.6

 

1450

2.74

4

112M-4-B3

11.3

188.3

1.0

4.24

5.5

132S-4-B3

 

 

60×2-43

8.60

143.4

0.6

950

2.06

3

 

 

5

132S-6-B3

8.27

137.9

1.0

3.18

4

132M1-6-B3

13.1

218.9

0.6

1450

3.15

4

112M-4-B3

12.6

210.5

1.0

4.86

7.5

132M-4-B3

 

 

60×2-46

9.89

164.8

0.6

 

950

2.33

3

 

 

5

132S-6-B3

9.73

162.2

0.8

2.91

4

132M1-6-B3

9.56

159.4

1.0

3.61

5.5

132M2-6-B3

15.1

251.6

0.6

1450

3.56

5.5

132S-4-B3

14.6

243.3

1.0

5.51

7.5

132M-4-B3

 

 

70×2-46

16.0

266.3

0.6

950

3.71

5.5

 

 

5

132M2-6-B3

15.5

258.9

1.0

5.73

7.5

160M-6-B3

24.4

406.4

0.6

1450

5.66

7.5

132M-4-B3

23.7

395.2

1.0

8.75

11

160M-4-B3

 

 

80×2-36

16.8

280.3

0.6

950

3.50

5.5

 

 

5.5

132M2-6-B3

16.3

271.2

1.0

5.41

7.5

160M-6-B3

25.7

4270

0.6

1450

5.43

7.5

132M-4-B3

24.8

413.9

1.0

8.51

11

160M-4-B3

 

 

80×2-46

24.0

400.1

0.6

950

5.52

7.5

 

 

5.5

160M-6-B3

23.4

389.5

1.0

8.60

11

160L-6-B3

36.6

610.3

0.6

1450

8.43

11

160M-4-B3

35.7

594.5

1.0

13.1

15

160L-4-B3

 

Pump Size

Flow Rate

Pressure

Pressure

MPa

Rotate Speed

Rotate Speed

r/min

Power kW

Required NPSHr

m

Motor Size

Motor Size

m³/h

L/mln

Shaft Power

Motor Power

 

 

80×2-51

29.1

485.3

0.6

950

6.31

11

 

 

5.5

160L-6-B3

27.9

464.9

1.0

10.5

15

180L-6-B3

44.0

733.6

0.6

1450

9.61

11

160M-4-B3

42.6

709.6

1.0

16.0

18.5

180M-4-B3

 

80×2-54

34.2

570

0.6

950

8.05

11

5.5

160L-6-B3

33.1

551

1.0

12.75

15

180L-6-B3

 

 

90×2-36

24.3

405

0.6

950

5.7

7.5

 

 

5.5

160M-6-B3

23.6

393.3

1.0

8.8

11

160L-6-B3

37.0

615.9

0.6

 

1450

8.42

11

160M-4-B3

36.1

602.4

1.0

13.0

15

160L-4-B3

 

 

90×2-42

28.3

470.9

0.6

950

6.55

11

 

 

5.5

160L-6-B3

27.5

457.6

1.0

10.2

15

180L-6-B3

43.1

718.8

0.6

1450

10.0

15

160L-4-B3

41.9

698.5

1.0

15.5

18.5

180M-4-B3

 

 

 

90×2-46

34.2

570.3

0.6

 

950

7.86

11

 

 

 

5.5

160L-6-B3

34.0

566.7

0.8

9.70

11

160L-6-B3

33.1

551.7

1.0

11.4

15

180L-6-B3

52.6

876.4

0.6

 

1450

12.0

15

160L-4-B3

52.0

866.0

0.8

14.9

18.5

180M-4-B3

51.4

856.1

1.0

18.6

22

180L-4-B3

 

90×2-51

42.8

713.3

0.6

950

9.9

15

5.5

180L-6-B3

41.6

693.3

1.0

16.0

18.5

200L1-6-B3

 

 

 

95×2-51

48.7

812.2

0.6

 

950

10.3

15

 

 

 

5.5

180L-6-B3

48.0

800.1

0.8

13.5

15

180L-6-B3

46.9

782.3

1.0

16.2

22

200L2-6-B3

72.7

1212

0.6

 

1450

16.1

18.5

180M-4-B3

72.0

1200

0.8

20.7

22

180L-4-B3

71.2

1187

1.0

25.8

30

200L-4-B3

 

 

 

100×2-46

48.7

812.2

0.6

 

950

10.8

15

 

 

 

5.5

180L-6-B3

48.0

800.1

0.8

13.3

15

180L-6-B3

46.9

782.3

1.0

16.7

22

200L2-6-B3

72.7

1212

0.6

 

1450

16.5

18.5

180M-4-B3

72.0

1200

0.8

20.4

22

180L-4-B3

71.2

1187

1.0

25.5

30

200L-4-B3

 

 

100×2-51

56.9

948.9

0.6

950

12.5

15

 

 

5.5

180L-6-B3

55.7

928.6

1.0

20.8

30

225M-6-B3

86.9

1448

0.6

1450

19.1

22

180L-4-B3

85.0

1417

1.0

31.8

37

225S-4-B3

 

Pump Size

Flow rate

Pressure  Pressure

MPa

Speed

Rotate Speed

r/min

Power kW

Required NPSH margin

NPSHr

m

Motor Size

m³/h

L/mln

sh功表wer

Motor  power

 

 

110×2-46

60.9

1015

0.6

 

950

13.7

18.5

 

 

5.5

200L1-6-B3

58.9

981.7

1.0

21.8

30

225M-6-B3

96.7

1611

0.6

 

1450

21.9

30

200L-4-B3

94.6

1577

1.0

33.9

45

225M-4-B3

 

 

 

120×2-43

67.9

1131

0.6

 

950

15.5

18.5

 

 

 

5.5

200L1-6-B3

66.7

1112

0.8

19.2

22

200L2-6-B3

65.4

1090

1.0

24.5

30

225M-6-B3

108

1802

0.6

 

1450

24.7

30

200L-4-B3

105

1760

1.0

38.2

45

225M-4-B3

 

 

120×2-46

79.6

1327

0.6

 

950

17.8

22

 

 

5.5

200L2-6-B3

77.2

1286

1.0

28.2

37

250M-6-B3

125

2101

0.6

 

1450

28.5

37

225S-4-B3

123

2059

1.0

44.1

55

250M-4-B3

 

 

 

120×2-51

91.9

1532

0.6

 

950

20.5

30

 

 

 

5.5

225M-6-B3

89.9

1498

1.0

32.8

37

250M-6-B3

153

2550

0.4

 

1450

20.2

22

180L-4-B3

146.5

2441

0.6

33.1

45

225M-4-B3

143.5

2390

1.0

48.0

55

250M-4-B3

 

 

130×2-46

77.8

1297

0.6

 

730

17.4

22

 

 

5.5

225M-8-B3

75.3

1256

1.0

27.5

37

280S-8-B3

101.3

1688

0.6

 

950

22.6

30

225M-6-B3

98.0

1634

1.0

35.8

45

280S-6-B3

 

 

140×2-46

100

1670

0.6

 

730

22.8

30

 

 

5.5

250M-8-B3

96.0

1603

1.0

36.5

45

280M-8-B3

128

2147

0.6

 

950

28.3

37

250M-6-B3

125

2093

1.0

44.8

55

280M-6-B3

 

 

150×2-46

121

2029

0.6

 

730

26.6

37

 

 

5.5

280S-8-B3

118

1984

1.0

41.8

55

315S-8-B3

158

2640

0.6

 

950

34.6

45

280S-6-B3

154

2582

1.0

54.5

75

315S-6-B3

 

 

150×2-51

145

2407

0.6

 

730

31.6

45

 

 

5.5

280M-8-B3

141

2355

1.0

49.7

75

315M-8-B3

188

3133

0.6

 

950

41.1

55

280M-6-B3

184

3065

1.0

64.7

75

315S-6-B3

 

 

 

a simple structure and stable performance. Both the front and rear of the pump are equipped with insulation chambers, allowing gas or liquid to be used as a heat carrier to heat and insulate the pump, making it particularly suitable for transporting high-viscosity media. This series of insulated gear pumps has two inlet and outlet configurations: left inlet and right outlet, and right inlet and left outlet, with the same installation dimensions and strong interchangeability.

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