25VQ21A 1A20

The 25VQ21A 1A20 pump is produced by Vickers as a member of the VQ Thru-Drive Vane Pumps series, intended to supply controlled hydraulic flow to automated machinery that requires a through-drive arrangement. Its displacement is 67.5 cm³ per revolution (4.12 in³ per revolution), which defines the fluid volume moved on each shaft turn and establishes baseline flow. A maximum operating pressure of 210 bar (3000 psi) allows the unit to handle common system loads without internal bypass. Rated flow reaches 21 US gpm at 1200 r/min and 7 bar, letting the pump support medium-duty circuits at reduced speed. Right-hand rotation matches standard engine and electric-motor drives, simplifying coupling alignment. The flange mount with a single shaft seal secures the housing to the prime mover while containing oil at the drive end. SAE four-bolt flanges on both inlet and outlet ports permit quick connection to industry-standard hoses or manifold blocks.

The pump operates up to 2500 r/min, enabling a delivery of 146.2 L/min (38 US gpm) for applications that demand high actuator speed. Supplying that flow at maximum pressure requires about 61.9 kW (83 hp) of input power, so the drive motor must be sized accordingly. The outlet is positioned opposite the inlet under code A, easing pipe runs where a straight-through arrangement is preferred. A standard pilot configuration, shown by the omitted code, keeps control interfaces consistent with other Vickers components and avoids extra hardware. The assembly weighs 14.5 kg (32 lb), allowing one technician to lift it into place while maintaining the structural strength needed for 210 bar operation.