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Mud Pump
NF-500 Mud Pump
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Description


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-500 Triplex piston single role 165r/min 373KW Herringbone gear 4.285 :1 203mm
Discharge Pipe Diameter Small diameter gear Bond Valve Weight Lubrication
101.5mm5000psi 139.6mm 31.74×31.74mm Valve valve on theAPI#5 9771Kg Mandatory increases spatter
 
Stroke
/min
Rated Power Liner diameter(mm)& Pressure Mpa(psi)
170 160 150 140 130 120 110 100
9.4 1365 10.5 1540 12.1 1750 13.9 2010 16.1 2740 22.5 3260 22.5 3260 27.2 3945
  KW HP Displacement(L/S)(gal./s)
170 379 515 36.75 9.71 32.56 8.60 28.61 7.56 24.93 6.59 21.49 5.68 18.31 4.84 15.39 4.07 12.72 3.36
165※ 373 500 35.67 9.42 31.60 8.35 27.77 7.34 24.19 6.39 20.86 5.51 17.77 4.70 14.93 3.94 12.34 3.26
150 334 455 32.43 8.57 28.73 7.59 25.25 6.67 21.99 5.81 18.96 5.01 16.16 4.27 13.58 3.59 11.22 2.96
140 312 424 30.27 8.00 26.81 7.08 23.56 6.22 20.53 5.42 17.70 4.68 15.08 3.98 12.67 3.35 10.47 2.77
130 290 394 28.11 7.43 24.90 6.58 21.88 5.78 19.06 5.04 16.44 4.34 14.00 3.70 11.77 3.11 9.73 2.57
120 267 364 25.94 6.85 22.98 6.07 20.20 5.34 17.60 4.65 15.17 4.01 12.93 3.42 10.86 2.87 8.98 2.37
110 245 333 23.78 6.28 21.07 5.57 18.52 4.89 16.13 4.26 13.91 3.67 11.85 3.13 9.96 2.63 8.23 2.17.
1     0.2162 0.057 0.1915 0.051 0.1683 0.044 0.1466 0.039 0.1264 0.033 0.1077 0.028 0.0905 0.024 0.0748 0.020

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