What you don’t feel it’s his biggest performance. 

Silent reaches new heights in terms of soundproofing, allowing you to drop below the threshold of 70 dB in operation. Built to meet the needs of intensive use and when large refill capacities are required, it is equipped with 4 front filling connections with high pressure hoses and an intuitive control panel. It is also equipped with an electric motor and powerful pumping units. For longer filter life, the Tornado high pressure dryer is recommended. Available as optional: the Presec system for filter saturation control or the SAM system for multigas analysis and remote charging panel.

Simplicity comes standard. 

Imagine having a compressor capable of great performance and endowed with extraordinary solidity. What would all this be without absolute simplicity in managing it? We believe that innovation is for this: to make everything simpler.

The highest air quality is the goal of a Coltri compressor. 

Air purity and quality are two essential characteristics of our compressors. The air you breathe from Coltri compressors complies with the EN 12021: 2014 standards: this is why you can work, have fun and exercise with them in absolute safety.

Standard equipment 

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 

Technical data 

Type of gas - Breathing air (EN 12021) – Nitrox 40% max O2 – Helium – Nitrogen 

Intake pressure Atmospheric - max 300 millibars 

Nominal pressure - 250 bar / 330 bar / 360 bar 

Working pressure - 250 bar / 330 bar / 360 bar 

Max working pressure - 420 bar 

Permissible ambient temperature range - -10° C ÷ +40° C 

Permissible altitude - 0 ÷ 1.500 m SLM 

Max permissible tilt - 15° 

Design - Cabinet insonorizzato 

Operating voltage, standard - 400v/50Hz 

Other operating voltage - 230v/50Hz / 230v/60Hz / 440v/60Hz 

Oil - Synthetic Coltri Oil ST 755 

Oil change interval - Every year / 1,000 h 

Frame Steel thickness - 1.5 mm – color RAL 9005 – Powder coating – scratch-resistant 

Compressor 

Charging rate (Measured during 10 liters cylinder filling from 0-200 bar tolerance +/- 5% at + 20° C ambient temperature.) 

450 ET - 450 l/min 27 m3/h 15.9 CFM 

550 ET - 550 l/min 33 m3/h 19.4 CFM 

650 ET - 650 l/min 39 m3/h 23 CFM 

750 ET - 750 l/min 45 m3/h 26.5 CFM 

Purification system - 2 Hyperfilter 

Cooling air flow, min. 

450 ET - 4.050 m3/h 

550 ET - 4.820 m3/h 

650 ET - 4.820 m3/h 

750 ET - 5.590 m3/h 

Weight Standard model. (Weight and dimensions may vary depending on accessories.) 

450 ET - 446 kg 983 lb 

550 ET - 451 kg 994 lb 

650 ET - 455 kg 1.003 lb 

750 ET - 463 kg 1.020 lb 

Dimensions (W x D x H) - 93,5 x 130 x 173,5 cm 36.8 x 51.3 x 68.3 in 

Motor 

Power 

450 ET - 7.5 kW 10 Hp 

550 ET - 9 kW 12.5 Hp 

650 ET - 11 kW 15 Hp 

750 ET - 15 kW 20 Hp 

Type 

450 ET - Three-phase electric 

550 ET - Three-phase electric 

650 ET - Three-phase electric 

750 ET - Three-phase electric 

Operating voltage/frequency (Different voltage / frequency available on request.) 

450 ET - 230v/50Hz / 230v/60Hz / 400v/50Hz / 440v/60Hz

550 ET - 230v/50Hz / 230v/60Hz / 400v/50Hz / 440v/60Hz 

650 ET - 230v/50Hz / 230v/60Hz / 400v/50Hz / 440v/60Hz 

750 ET - 230v/50Hz / 230v/60Hz / 400v/50Hz / 440v/60Hz

Rated current 

450 ET - 13.2 A 

550 ET - 13.2 A 

650 ET - 13.2 A 

750 ET - 13.2 A 

Speed (RPM) 

450 ET - 2.870 1/min 

550 ET - 2.880 1/min 

650 ET - 2.910 1/min 

750 ET - 2.920 1/min 

Protection class - IP55 (TEFC)