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NF-800 Mud Pump

Continuous tooth herringbone gear. One-piece alloy steel crank. Renewable crosshead guide. The frame is made of welded steel plate to provide the frame with high strength, good rigidity and lightweight. The extension rod packing is of duplex seal structure to provide the good seal result. The power end uses the combined lubrication system of forced lubrication and splash lubrication.

Features
1、Power end features
Continuous tooth herringbone gear. One-piece alloy steel crank. Renewable crosshead guide. The frame is made of welded steel plate to provide the frame with high strength, good rigidity and lightweight. The extension rod packing is of duplex seal structure to provide the good seal result. The power end uses the combined lubrication system of forced lubrication and splash lubrication.
2、Crankshaft 
The crankshaft is made of cast alloy steel and is furnished with big geared ring, connecting rod and bearing. The tooth form of the big-geared ring is herringbone gear. The gear bore and the crankshaft surface is interference fitted and they are both fastened with bolts and lock nuts. The big end of the connecting rod is mounted on three eccentric straps of the crankshaft through single row short cylindrical roller bearings and the small end on the crosshead pin through double row long cylindrical roller bearing. Double row radial spherical roller bearings are mounted at both ends of the crankshaft.

3、Cylinders
Cylinders are made of forged alloy steel. Three cylinders of each pump are interchangeable. Valve-over-valve (through type cylinder) design reduces the cylinder volume and promotes the volumetric efficiency. At customers’ request, the cylinder surface may be nickel plated to improve the abrasion resistance.

Parameters

Model

Type

Rated Stroke

Rated Power

Gear type

Gear Ratio

Suction Pipe Diameter

NF－800

Triplex piston single role

150r/min

596KW

Herringbone gear

4.184：1

253mm

Discharge Pipe Diameter

Small diameter gear

Bond

Valve

Weight

Lubrication

126.5mm5000psi

177.7mm

44.4 4×44.44mm

Valve valve on theAPI#5

14500Kg

Mandatory increases spatter


Stroke/min

Rated Power

Liner diameter（mm）& Pressure Mpa(psi)

170(6 3/4″)

160(6 1/4″)

150 (6″)

140(5 1/2″)

130(5 ″)

120(4 3/4″)

110(4 1/2″)

100(4″)

13.6

2000

15.4

2250

17.5

2570

20.1

2950

23.3

3420

27.3

4015

32.5

4780

34.3

5000


KW

HP

Displacement（L/S）(gal./s)

160

636

853

41.51

10.97

36.77

9.71

32.32

8.54

28.15

7.44

24.27

6.41

20.68

5.46

17.38

4.59

14.36

3.79

150※

596

800

38.92

10.28

34.47

9.11

30.30

8.00

26.39

6.97

22.96

6.07

19.39

5.12

16.29

4.30

13.47

3.56

140

557

747

36.32

9.59

32.17

8.50

28.28

7.47

24.63

6.51

21.24

5.61

18.10

4.78

15.21

4.02

12.57

3.32

130

517

693

33.73

8.91

29.88

7.89

26.26

6.94

22.87

6.04

19.72

5.21

16.81

4.44

14.12

3.73

11.67

3.08

120

477

640

31.13

8.22

27.58

7.29

24.24

6.40

21.11

5.58

18.21

4.81

15.51

4.10

13.03

3.44

10.77

2.85

110

437

587

28.54

7.54

25.28

6.68

22.22

5.87

19.35

5.11

16.69

4.41

14.22

3.76

11.95

3.16

9.87

2.61

1



0.2594

0.069

0.2298

0.061

0.2020

0.053

0.1759

0.046

0.1517

0.040

0.1293

0.034

0.1086

0.029

0.0898

0.024

Note: 1, volumetric efficiency by 100% and 90% mechanical efficiency by 2, and the recommended number of continuous operation-the input power