The MPO series air-oil booster is a device made up of a pneumatic cylinder the rod of which acts directly on the oil in the high pressure chamber, raising pressure to a value of over 200 bar. The single-action versions pressurise oil volumes of 25 cc with a compression ratio of 30:1, or 50 cc volumes with a ratio of 25:1. For different volumes or compression ratios please contact our technical service. Boosters are supplied with machine attachment feet as standard; an external oil tank, pressure gauge and pressure switch can be supplied on request.