New piston pumps for open circuits

Eaton Corporation has announced the availability of a new series of compact piston-type open circuit pumps (Fig.). With a displacement volume of 98 cm3 per revolution at 280 bar and 2200 1/min, the new 620 series is ideal for a variety of mobile and stationary applications, such as wheel loaders, motor graders, concrete equipment, salt and sand spreaders, vacuum trucks, telehandlers, rail maintenance, and drill rigs. Planned future models in the 620 Series will include displacements of 65 cm³, 74 cm3 and 120 cm3 per revolution. A 15° swash plate angle allows the pump body to be up to 27 mm shorter than competitive pumps. Internal flows and valve plate timing have been optimized to realize the packaging benefits of the smaller angle. Bearing design has been optimized to achieve a 13 600 hour B-10 life while handling the higher internal forces created by the new design. The control piston is treated with an anti-friction coating to minimize particulate build-up and reduce response time.

 

Eaton Corporation, Cleveland/Ohio (USA),

Tel.: +1 216 523-5000, www.eaton.com

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