The power pump shell is the structure of steel plate welding and has been tested with its intensity by authority.

Features
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.
Parameters

Model	Type	Rated Stroke	Rated Power	Gear type	Gear Ratio	Suction Pipe Diameter
N3NB-500	Triplex piston single role	500 Hp	165r/min	Herringbone gear	4.285 :1	203mm
Discharge Pipe Diameter	Small diameter gear	Bond	Valve	Weight	Lubrication
101.5mm5000psi	139.6mm	31.74×1.74mm	Valve valve on theAPI#5	9771Kg	Spatter lubrication

Stroke /min	Rated Power		Liner diameter(mm)& Pressure Mpa(psi)
			170	160	150	140	130	120	110	100
			9.4	10.5	12.1	13.9	16.1	22.5	22.5	27.2
	KW	HP	Displacement(L/S)(gal./s)
170	379	515	36.75	32.56	28.61	24.93	21.49	18.31	15.39	12.72
165?	373	500	35.67	31.60	27.77	24.19	20.86	17.77	14.93	12.34
150	334	455	32.43	28.73	25.25	21.99	18.96	16.16	13.58	11.22
140	312	424	30.27	26.81	23.56	20.53	17.70	15.08	12.67	10.47
130	290	394	28.11	24.90	21.88	19.06	16.44	14.00	11.77	9.73
120	267	364	25.94	22.98	20.20	17.60	15.17	12.93	10.86	8.98
110	245	333	23.78	21.07	18.52	16.13	13.91	11.85	9.96	8.23
1			0.2162	0.1915	0.1683	0.1466	0.1264	0.1077	0.0905	0.0748