Coltri Open

Control is everything.

Designed with control systems that allow effective monitoring of operations: interstage pressure, oil level, cabin internal temperature and direction of rotation detector.

4-stage high pressure pumping unit.

Placed after the last compressor separator and before the pressure holding valve, the Hyperfilter purification system enables reliable treatment of the breathing air according to DIN EN 12021¹ when using original filter cartridges. The separator present between the 2nd and 3rd stage of the purification circuit allows to extract the greatest possible humidity.

Open frame with vertical development designed to facilitate maintenance operations. The oil level and drain reported outside, the control console equipped with inter-stage pressure gauges, the oil pressure gauge, the internal temperature indicator, the presence alarm and incorrect phase sequence, the lack alarm oil and the start, stop and manual condensate drain commands allow easy management and maintenance of the compressor.

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    Technical data


    Heavy Duty

    Charging rate

    450 / 550 / 650 / 750 l/min


    90,5 x 105,2 x 153 cm
    35.6 x 41.4 x 60.2 in


    356 – 373  kg
    784 – 943 lb


    Electric three phases

    Working pressure

    250 / 330 / 360 / 420 Bar

    Standard accesories

    4 Filling connections of your choice of DIN 232, DIN 300 or INT/YOKE 232 bar

    4 filling hoses of 1.2 m in length

    Pressure maintenance valve

    Interstage control gauges

    Double PED certified Hyperfilter filter system

    Cabin internal temperature with automatic switch-off

    Automatic condensate drain

    Automatic direction of rotation control

    Electronic pressure switch with automatic shutdown

    Oil level control with automatic shutdown

    Oil pump

    Automatic condensate drain with conveyor system in the tank

    Frame color Black RAL 9005

    Operating Voltage

    400 V, 50 Hz / 230 V, 50 Hz / 440 V, 60 Hz / 230 V, 60 Hz

    Breathing air compressors, strictly Made in Italy by Coltri