The power end :The frame is welded steel-plate construction. It is stress-relieved after welding. The drive gears are involute type gears which allow smooth operation, high efficiency and long life. The crankshaft is a hollow one-piece steel casting. The power end is either splash or pressure lubricated. The fluid end: The suction and discharge flanges conform to ANSI and API specifications. The piston rod includes an intermediate rod, that allows quick assembly & disassembly. The valve seat bores have a bottom shoulders. The pistons and liners are spray lubricated and cooled, which allow an extended service life Damageable pieces have strong currency.