A 25VQ Heavy Duty Vane Pump is a high-pressure, high-speed hydraulic pump designed for demanding applications like heavy machinery, typically used in industries like oil and gas, metal cutting, dump trucks, and wheel loaders, which delivers a consistent flow of fluid at high pressure by utilizing a rotary vane mechanism, with VQ indicating a specific model and the 25 indicating the size capable of handling heavy duty workloads and high pressure situations.