2520VQ21A11 166AC20L

The 2520VQ21A11 166AC20L vane pump belongs to the VQ Thru-Drive Vane Pumps series from Vickers and is intended to generate steady hydraulic flow for mobile or industrial automation circuits. A flange mount configuration lets the housing fasten directly to a power unit or gearbox, minimizing alignment issues during installation. Inlet and outlet passages are arranged with SAE four-bolt flanges, so technicians can secure rigid tube or hose connections that withstand high system load without leakage. The AC port orientation places the No. 2 outlet 45° clockwise from the inlet, simplifying manifold routing in compact frames. Counter-clockwise, left-hand shaft rotation matches engines or motors that turn in the same direction, preventing flow reversal. A single shaft seal contains the hydraulic fluid while keeping friction and maintenance points low.

With a shaft-end displacement of 67.5 cm³ per revolution, the pump delivers a predictable volume of oil each turn, allowing designers to calculate actuator speed precisely. It tolerates continuous pressures up to 210 bar, giving circuits ample force capability for lifting, steering, or clamping functions. The rotating group can run at speeds to 2500 r/min, enabling the unit to pair with high-speed electric or diesel prime movers. At a reference speed of 1200 r/min the SAE rating of 21 US gpm indicates the flow available to downstream valves and cylinders, aiding selection of return-line coolers and filters. A typical mass of 20.5 kg keeps the assembly light enough for single-person handling yet heavy enough to damp vibration in demanding duty cycles.