4520V50A8 1BB22L

The 4520V50A8 1BB22L pump is manufactured by Vickers as part of the Vane Pumps series and is intended for hydraulic automation where two discrete flow sections are required. A cover-end displacement of 27.4 cm³ per revolution provides a small-volume stream that suits control circuits or lubrication branches, while the cover-end SAE rating of 8 US gpm at 1200 r/min quantifies the delivery for those auxiliary loads. The cover section tolerates a maximum pressure of 210 bar, allowing it to operate pilot valves and actuators that demand high pressure but modest flow. Flange mounting secures the housing directly to the prime mover, keeping shaft alignment stable under varying load. A standard pilot interface ensures the pump can replace comparable units without modifying drive arrangements. Port orientation coded BB positions No. 1 at 90 ° counter-clockwise and No. 2 at 45 ° counter-clockwise from the inlet, which helps designers route hoses away from obstructions. A single shaft seal contains case pressure and protects the drive end from external contamination.

The shaft-end displacement is 162.3 cm³ per revolution, supplying the high-flow leg that powers cylinders or motors in the main circuit, and its SAE rating of 50 US gpm at 1200 r/min defines the available volume for rapid actuator movement. A maximum pressure of 175 bar on the shaft end matches common system limits for mobile and industrial machines, balancing performance with component longevity. The pump can be driven at speeds up to 2200 r/min, giving flexibility to pair it with electric or diesel prime movers across a broad operating range. All ports use SAE four-bolt flanges, providing leak-free connections that withstand the stated pressures without additional adapters. These flanges are oriented as specified earlier, so installation crews can prepare rigid tubing or hose assemblies before final mounting. Combined, these characteristics let the pump deliver simultaneous low-flow/high-pressure and high-flow/moderate-pressure outputs for complex hydraulic circuits.