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-2200	Triplex piston single role	105 r/min	1640kw	Herringbone gear	3.512:1	305mm
Discharge Pipe Diameter	Small diameter gear	Bond	Valve	Weight	Lubrication
130mm 5000psi	254mm	63.5×44.45mm	Valve valve on theAPI#8	38460kg	Mandatory increases spatter

Stroke /min	Rated Power		Liner diameter(mm)& Pressure Mpa(psi)
			230		220		210		200		190
			19.0	2760	20.8	3015	22.8	3310	25.1	3645	27.9	4040
	KW	HP	Displacement(L/S)(gal./s)
*105	1640	2200	77.65	1231	71.05	1126	64.73	1026	58.72	931	52.99	840
90	1406	1886	66.56	1055	60.90	965	55.49	880	50.33	798	45.42	720
80	1250	1676	59.16	938	54.13	858	49.32	782	44.74	709	40.37	640
70	1094	1467	51.76	820	47.36	751	43.16	684	39.14	620	35.33	560
60	937	1257	44.37	703	40.60	644	36.99	586	33.55	532	30.28	480
50	781	1048	36.97	586	33.83	536	30.83	489	27.96	443	25.23	400
1			0.7395	11.72	0.6766	10.72	0.6165	9.772	0.5592	8.863	0.5047	8.000

Stroke /min	Rated Power		Liner diameter(mm)& Pressure Mpa(psi)
			180		170		160		150		140
			31.0	4505	34.5	5000	34.5	5000	34.5	5000	34.5	5000
	KW	HP	Displacement(L/S)(gal./s)
*105	1640	2200	47.56	754	42.42	672	37.58	596	33.03	524	28.77	456
90	1406	1886	40.77	646	36.36	576	32.21	511	28.31	449	24.66	391
80	1250	1676	36.24	574	32.32	512	28.63	454	25.16	399	21.92	347
70	1094	1467	31.71	503	28.28	448	25.05	397	22.02	349	19.18	304
60	937	1257	27.18	431	24.24	384	21.47	340	18.87	299	16.44	261
50	781	1048	22.65	359	20.20	320	17.89	284	15.73	249	13.70	217
1			0.4530	7.180	0.4040	6.404	0.3579	5.673	0.3146	4.986	0.2740	4.343

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