3520V35A5 1AA22R

The 3520V35A5 1AA22R vane pump is manufactured by Vickers within the V Series Vane Pumps series. It is intended to supply controlled flow and pressure to hydraulic automation circuits that require two distinct outputs from a single drive. The shaft-end displacement is 112 cm³ per revolution (6.83 in³/r), providing the primary volume needed for cylinders and motors, while the cover-end displacement of 18 cm³ per revolution (1.10 in³/r) serves ancillary functions such as pilot lines. Clockwise rotation when viewed from the shaft end aligns with most industrial power units, and a minimum operating speed of 600 rpm maintains internal lubrication at low start-up speeds. The pump can be driven up to 1800 rpm so it matches common electric motor ratings without overspeed. A moment of inertia of 0.001629 N·m·s² (0.01495 lb·in·s²) limits acceleration torque on the drive shaft, aiding rapid machine cycling. SAE four-bolt flange ports provide secure, leak-free connections to suction and delivery plumbing.

At rated conditions of 1200 rpm and 100 psi, the shaft end delivers 35 gpm to power the main circuit, while the cover end supplies 5 gpm for auxiliary loads, enabling separate flow control without an extra pump. The cover end can sustain a continuous pressure of 207 bar (3000 psi), giving reserve for high-force actuators, whereas the shaft end is limited to 172 bar (2500 psi) to protect the larger displacement section from excess loading. A maximum inlet pressure of 1.4 bar (20 psi) prevents seal damage when the reservoir is pressurized, and a minimum inlet pressure of −0.17 bar (5 inHg) allows moderate suction lift where gravity feed is not possible. Outlet 1 is located opposite the inlet to simplify straight-through piping, and Outlet 2 sits 135° counter-clockwise from the inlet to accommodate angled return lines in tight installations. These port orientations, combined with the speed and pressure limits listed above, define reliable operating boundaries for continuous service.