Breathing Air Compressor MARK III Silent 235 l/min – 232 / 300 bar
Stationary 3-stage high-pressure breathing air compressor with 235 l/min delivery rate, partially soundproofed design, and 400 V three-phase drive.
The MARK III 235 ET Silent has been developed for users requiring reliable and performance-stable air supply in professional environments. Whether for dive centers, fire departments, workshops, or PCP applications – this model combines solid delivery capacity with controlled noise levels and high operational safety.
With an effective delivery rate of 235 l/min (14.1 m³/h), the compressor enables fast single cylinder fills as well as efficient operation with regular cylinder changes in the 232 bar or 300 bar range.
The system is powered by the proven MCH 13 high-pressure compressor unit with three compression stages. The robust construction is engineered for continuous stationary operation and provides high mechanical durability.
Maxi Filter System – Certified Breathing Air According to DIN EN 12021
The integrated Maxi filter system ensures compliant breathing air purification in accordance with DIN EN 12021:2014. The filter unit achieves an air purification capacity of up to 890 m³ (at 20 °C / 300 bar) and is designed for continuous duty operation.
Standard equipment includes an intermediate separator after the second compression stage as well as a high-pressure final separator with pressure maintaining valve. Optionally, a CO filter cartridge with HOPCALITE catalyst can be integrated.
Technical Data MARK III 235 ET Silent
- Delivery rate: 235 l/min (14.1 m³/h)
- Working pressure: 232 / 300 bar
- 3 compression stages (MCH 13)
- Drive power: 4 kW at 400 V three-phase
- Weight: approx. 162 kg
- Sound pressure level: approx. 74 dB(A)
- Dimensions (W × D × H): 103 × 73 × 91 cm
- Breathing air quality according to DIN EN 12021
- Two high-pressure filling connections (DIN 232 / DIN 300 / INT-Yoke selectable)
- Automatic final shut-off via electromechanical pressure switch
- Automatic condensate drain
- Maxi filter system with pressure maintaining valve
- Interstage pressure gauges
- Oil sump capacity: 1.8 liters
- Stainless steel valves in the 2nd and 3rd compression stage
- Oil change interval: 1 year or according to operating hours
- Permissible ambient temperature: -10 °C to +40 °C
- Maximum inclination: 6°
- Temperature monitoring inside the enclosure
- Rotation direction control
Product safety information
Manufacturer information:
Aerotecnica Coltri
Via dei Colli Storici 177
Desenzano del Garda (BS), Italien, 25015
https://www.coltri.com
