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Mud Pump
N3NB-800 Mud Pump
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1.Power End
The power pump shell is the structure of steel plate welding and has been tested with its intensity by authority. The crankshaft is a composed structure of straight shaft and eccentric wheel. Its airproof part of elastic ripple tube has been awarded a patent certificate by the state. The transmission gear is of medium hard side to improve the enduring ability.
2.Fluid End 
Liquid power side valve is of whole forging with a vertical structure, the volume interstice is minimum. The k1:6 wimble surface has been processed by roll pressing and therefore is improved significantly with its cooperative precision. The water supply valve is fastened reliably and conveniently. The valve box and the base holes conform to APL standard. 
3.Design Features
Parameters were optimized and the stroke has been lengthened appropriately to reduce the number of strokes to enhance the intake performance of the pump and for longer endurance of the relatively weak parts. The pumps are widely used in oil fields and other industrial and mining enterprises, well drilling and well maintenance, etc. The serial products are produced strictly by SY5138 standards established by the Petroleum Industry Ministry of China and factory-leaving experiments are carried out accordingly. 

Model Type Input power Axle rated speed (r/min) Rated speed pump stroke length Gear ratio
N3NB-800 Triplex single role 800 Hp 420 120 Stroke /min 210mm 3.5
Weight excluding large pulley and air packages Suction Pipe Diameter Discharge Pipe Diameter Dimension(mm) Weight
13.2 254-305mm 100mm 3590×2155×2010 14.8t
Speed Diesel (to/ min) Pump speed (Stroke/min) Displacement(L/S)
φ140 φ150 φ160 φ170 φ180
1500 120 19.38 22.25 25.3 28.58 32.05
1300 110 17.77 20.4 23.21 26.20 29.37
1200 100 16.15 18.54 21.10 23.82 26.70
1100 95 15.34 17.61 20.04 22.63 25.37
Rated pump pressure(MPa) / 27.3 23.8 20.9 18.5 16.5
Mechanical efficiency by 90% volumetric efficiency by 100%


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