PTU1 27/- Series are offline filter separator units with pump capacities from 6 to 13.5 litres/minute. PTU1 is used for offline filtration of gas oil and MDO (marine diesel oil) on marine diesel engines, combining the fine filtration with continuous water separation. PTU1 filter separators are available with either manual or automatic water discharging. Models with automatic discharging have electronic pressure monitoring as standard.

PTU1 27/* are supplied in sizes 27/54 and 27/108, using 2 or 4 stacked CJC™ F 27/27 filter inserts.