Continuous tooth herringbone gear. One-piece alloy steel crank. Renewable crosshead guide.

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