AA10VSO10DRG/52R-VKC64N00 ESO857

The AA10VSO10DRG/52R-VKC64N00 ESO857 pump belongs to the A10VSO Variable Pumps series produced by Bosch Rexroth for hydraulic automation systems. It works in an open-circuit layout, simplifying return flow management to the tank. A nominal pressure of 4,100 psi (280 bar) defines its continuous duty limit, while a maximum pressure of 5,100 psi (350 bar) supports short overload events. The DRG Δp standard setting of 290 psi (20 bar) establishes the load-sensing differential used by the control piston. Through-drive capability rated at 100 percent for a pump of the same size permits tandem mounting to raise flow without a larger prime mover.

The pump’s inlet conditions are governed by several installation dimensions and pressures. A maximum suction height of 31.5 in (800 mm) limits vertical lift to avoid cavitation at high speeds. The housing should stay at least 3.94 in (100 mm) above the reservoir bottom so sediment is not drawn into the intake. A clearance of 0.98 in (25 mm) between the suction port and the oil level prevents the casing from draining during shutdown. Maintaining an immersion depth of 7.87 in (200 mm) keeps the inlet submerged when the fluid surface fluctuates. A minimum inlet pressure at port S of 12 psi (0.8 bar) is required to preserve volumetric efficiency and protect the rotating group.