How much pressure can modern screw presses use during oil extraction?

In modern fat and oil processing, continuous screw presses are highly efficient machines that utilize a worm screw to progressively increase pressure as material moves through a slotted barrel. These devices can reach pressures as high as 30,000 pounds per square inch.1

In metric units, these modern systems typically attain pressures ranging from 700 to 2,100 kilograms per square centimetre. This mechanical process allows for a continuous operation that generally removes more oil than older methods, such as the hydraulic press, leaving behind a residual cake with an oil content typically between 3 and 5 percent.21