 They are often used where a powerful hydraulic jack is required, but there is insufficient space to fit the cylinder size that would normally be required, for the lifting force necessary and with the available system pressure.Using an intensifier, mounted outside the jack, allows a higher pressure to be obtained and thus a smaller cylinder used for the same lift force.Intensifiers are also used as part of machines such as hydraulic presses, where a higher pressure is required and a suitable supply is already available.