3520V25A12 11AA22L

The 3520V25A12 11AA22L pump belongs to the V Series Vane Pumps series and is manufactured by Vickers for fixed-displacement hydraulic automation circuits. It delivers flow from two sections, and its front section displaces 81 cm³ per revolution while the rear section moves 40 cm³ per revolution, allowing separate circuits to be driven from one housing. Continuous operating pressure is rated at 172 bar on the front section and 159 bar on the rear section so the designer can assign loads according to circuit demand. The pump maintains stable delivery down to a minimum speed of 600 rpm, making it suitable for slow-running industrial prime movers. Shaft rotation is left-hand, counterclockwise, which dictates motor arrangement in the power unit. Fluid enters and leaves through an SAE four-bolt flange, and the port threads follow inch standards for compatibility with common North American pipe fittings.

No.1 outlet is positioned opposite the inlet, and No.2 outlet is set 135 degrees counter-clockwise from the inlet, a layout that simplifies manifold routing in compact power packs. Overall length is 13.48 in, width is 8.38 in, and height is 6.4 in, providing a rectangular footprint that fits within medium frame reservoirs. The assembly weighs 75 lb so a single technician can handle mounting with standard lifting eyes. These dimensions permit direct replacement in existing Vickers double-pump cavities without bracket modifications. Port orientation combined with the stated envelope allows the pump to be nested beside motors, filters, and heat exchangers while retaining wrench clearance on the flange bolts. The outlet angles ensure that separate circuit lines avoid interference with the inlet hose, completing the spatial requirements not addressed in the first paragraph.