Hydraulic pump specifications cover various critical aspects, including type, flow rate, pressure rating, and efficiency. Common types are gear, piston, and vane pumps, each suited for specific applications and performance requirements. Flow rate, typically measured in gallons per minute (GPM) or liters per minute (LPM), indicates the volume of fluid the pump can move. Pressure rating, measured in pounds per square inch (PSI) or bar, defines the maximum pressure the pump can handle. Efficiency, often expressed as a percentage, reflects the pump's ability to convert mechanical energy into hydraulic energy with minimal losses. Other important specifications include the pump's size, weight, mounting configuration, and compatibility with hydraulic fluids.