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
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
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
