Lewa now offers their API 674 plunger pumps with splitted gear housings. This feature significantly facilitates maintenance, permitting the use of a fully balanced crankshaft which generates less noise and vibration, thus reducing wear. The power range was also extended with the two quintuplex plunger pumps G5K 500 and G5K 800 with maximum power of up to 800 kW.
The very short design of Lewa plunger pumps is made possible by the special alignment of the plunger and crosshead. These pumps also have high efficiency, low energy consumption, and a long service life. Their design with splitted gear box also permits the maintenance of components without disassembling the process pipeline. The crankshafts are drop-forged and shot-blasted, leading to a homogeneous grain structure and low stress level. The integrated gear unit is self-adjusting and both the crankshaft and the pinion shaft are practically free of axial load.
The powerful pumps work with volumetric accuracy. Their large valve cross-sections make the suction pressures required comparatively small. This mostly eliminates the need of a booster pump. Starting at a power of 15 kW, flexible use is possible at different drive speeds up to 800 kW, at pressures of up to 3,500 bar and a maximum flow rate of 290 m3.
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