Breathing Air Compressor with High Filling Capacity of 450 liters/min and max. 420 bar
The Coltri Open HD 450 ET from the Heavy Duty Line is a powerful high-pressure breathing air compressor for professional filling stations with high air demand. The open industrial design allows particularly effective heat dissipation and ensures stable operating conditions even at high ambient temperatures or in poorly ventilated environments. The compressor is equipped with a clearly arranged control panel and four front-mounted high-pressure filling connections, enabling multiple cylinders to be filled simultaneously. The high-performance MCH 22 compressor unit is located in the rear section of the frame and positioned to ensure an optimal cooling airflow. Reliable air purification is provided by the dual Hyperfilter system, which removes moisture, oil, and contaminants from the compressed air and ensures breathing air quality in accordance with DIN EN 12021. Thanks to its robust construction and powerful compressor technology, the Open HD 450 ET is ideally suited for dive centers, respiratory protection workshops, industrial applications, or central filling stations.
Technical Data – Coltri Compressor Open HD 450 ET
- Gas type: Breathing air according to DIN EN 12021
- Working pressure: 232 / 300 / 330 bar
- Intake pressure: atmospheric / max. 300 mbar
- Ambient temperature: –10 °C to +40 °C
- Permissible altitude: 0 – 1,500 m
- Maximum inclination: 15°
- Frame: Steel construction, powder-coated (RAL 9005)
- Delivery rate: 450 l/min (27 m³/h)
- Cooling air flow: 4,820 m³/h
- Noise level: approx. 77.3 dB(A)
- Weight: approx. 361 kg
- Dimensions (W × D × H): 90.5 × 102.5 × 153.5 cm
- Motor type: Three-phase motor
- Power: 7.5 kW (10 HP)
- Operating voltage: 400 V / 50 Hz or 440 V / 60 Hz
- Rated current: approx. 15 A
- Speed: approx. 2,870 RPM
- Protection class: IP55
- Compressor unit (MCH 22)
- 4 compression stages
- Interstage pressures: approx. 3.2 bar / 16 bar
- Oil capacity: 4 liters
- Forced lubrication with gear pump
- Stainless steel piping (AISI 316)
- Interstage condensate separators
- Safety valves after each compression stage
Filter System & Air Quality
- Dual Hyperfilter system (2 filters)
- Operating pressure of filters: 250 / 330 / 360 bar
- Max. pressure: 420 bar
- Air purification capacity: 3,050 m³ (at 20 °C / 300 bar)
- Breathing air quality according to DIN EN 12021
Standard Equipment
- 4 high-pressure filling connections (DIN 232 / INT-YOKE / DIN 300 selectable)
- Electronic pressure switch
- Interstage pressure gauges
- Automatic condensate drain
- High-pressure final separator with dual function
Optional Equipment
- Presec filter monitoring system
- CO SafeGuard
- Tornado high-pressure refrigeration dryer
- Multi-gas analysis system (SAM)
- 7" touchscreen control panel
- Remote filling panel
Product safety information
Manufacturer information:
Aerotecnica Coltri
Via dei Colli Storici 177
Desenzano del Garda (BS), Italien, 25015
https://www.coltri.com
