FIG. 39 shows the characteristic curve of a typical gear oil pump. It can be seen from the figure that the pump power increases with the increase of pressure. It can also be seen from the figure that even under high pressure, the pump stil

The purpose of the pump, in general, is to lift a required amount of liquid to a required height or to a place where required pressure is required. This required quantity, which corresponds to the flow rate of the pump, is usually expresse