Breathing Air Compressor with High Filling Capacity of 550 liters/min and max. 420 bar
The Coltri Open HD 550 ET is a powerful high-pressure breathing air compressor from the Heavy Duty Line and has been designed for professional filling stations with high air demand. With a delivery rate of 550 l/min, this model offers an excellent solution for applications where fast filling times and reliable continuous operation are essential. The open design allows particularly efficient air circulation around the compressor unit and therefore ensures stable operating temperatures even under demanding conditions. This makes the compressor ideal for warm environments, poorly ventilated rooms, or industrial installations. Equipped with the robust 4-stage MCH 36 high-pressure compressor unit, the Open HD 550 ET operates with high efficiency and durability. In combination with the dual Hyperfilter system, the compressed air is reliably purified and meets the requirements of the breathing air standard DIN EN 12021. Thanks to four front-mounted filling connections, several high-pressure hoses can be operated simultaneously, making the compressor particularly suitable for larger dive centers, respiratory protection workshops, or industrial compressed air stations.
Technical Data Coltri Compressor MCH36
- Gas type: Breathing air according to DIN EN 12021
- Working pressure: 232 / 300 / 330 bar
- Max. operating pressure: 420 bar
- Intake pressure: atmospheric / max. 300 mbar
- Permissible ambient temperature: –10 °C to +40 °C
- Maximum installation altitude: 1,500 m
- Maximum inclination: 15°
- Frame: Steel construction, powder-coated (RAL 9005)
- Delivery rate: 550 l/min (33 m³/h)
- Cooling air flow: approx. 4,820 m³/h
- Sound pressure level: approx. 77.3 dB(A)
- Weight: approx. 365 kg
- Dimensions (W × D × H): 90.5 × 102.5 × 153.5 cm
- Motor type: Three-phase motor
- Motor power: 9 kW (12.5 HP)
- Operating voltage: 400 V / 50 Hz or 440 V / 60 Hz
- Rated current: approx. 18.8 A
- Speed: approx. 2,880 RPM
- Protection class: IP55
- Compressor unit (MCH 36)
- 4 compression stages
- Interstage pressures: approx. 3.2 bar / 16 bar
- Oil capacity: 4 liters
- Forced lubrication via low-pressure 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 / DIN 300 / INT-YOKE selectable)
- Electronic pressure switch
- Interstage pressure gauges
- Automatic condensate drain
- High-pressure final separator
- Pressure maintaining / non-return valve
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
