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Compact piston type open circuit hydraulic pumps for moderate flow, high-pressure applications

17 September 2010

Eaton has released a new series of compact piston type open circuit pumps incorporating the latest technology for moderate flow, high-pressure applications. The new 620 Series is rated at 280bar and 2,200rpm with a displacement of 98cc per revolution. Planned future models in the 620 Series will include displacements of 65cc, 74cc, and 120cc per revolution.

The 620 Series pumps feature a 15 degree swash plate angle that allows the pump body to be up to 27mm shorter than competitive pumps. Internal flows and valve plate timing have been optimized to realize the packaging benefits of the smaller angle without sacrificing overall pump efficiency.

Bearing design is optimised 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.

A swash plate feedback sensor can be fitted if the pump is to be used in an electro-hydraulic system.

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