Super Silent

but without making a sound.

The SUPER SILENT model stands out for its high level of noise reduction. Easy to use, it features a high monitoring capability using control systems that track compressor operations.

3-stage high pressure pumping unit.

  • Monobloc in aluminum,
  • Crankshaft in forged steel
  • Splash lubrication
  • Forged aluminum connecting rods
  • Main roller bearings
  • Roller connecting rod bearings
  • 1st and 2nd stage cylinders in aluminum with hard nicasil coating
  • 2nd and 3rd stage slide guide cylinders in aluminum with hard nicasil coating
  • 3rd stage cylinder in special treated steel.
  • Stainless steel intake and exhaust valves
  • Interstage cooling pipes in stainless steel
  • Separator after the 2nd and 3rd stage
  • Safety valves after each stage
  • Maxifilter filter system
  • Oil level sensor

The purity of the air is achieved.

The Maxifilter purification system enables reliable treatment of breathing air according to DIN EN 12021 when using original filter cartridges. Placed after the separator of the 2nd and 3rd compressor stages and before the pressure maintenance valve to create a first fundamental moisture barrier. The filtering capacity with inlet air at 20 ° C and 200 bar is 620m³.

Electrical cabinet

  • ON / OFF switch with motor protection switch.
  • Electromechanical pressure switch that stops the compressor at the final pressure.
  • Drainage of all separators between the individual stages and also of the final separator during compressor operation
  • Timer for automatic condensate drain.
  • Integrated no-load start (automatic drain every time the unit is switched off).
  • 5 liter condensate collection tank, with silencer; capacity of about 3 liters, for the ecological disposal of condensate.
  • Interstage pressure gauges display the working pressure for the individual compression stages. This pressure information allows you to check the tightness of the valves (inlet and outlet) of each stage and to quickly identify potential sources of failure.


Silenced chassis made for environments that require a low noise level. The oil level and drain reported outside, the control console equipped with inter-stage pressure gauges, the internal temperature indicator, the alarm presence and incorrect phase sequence, the oil lack alarm and the start-stop commands and manual condensate drain allow easy management and maintenance of the compressor.

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

2 Cylinder connections to choose from DIN 232, DIN 300 or INT / YOKE 232 bar
2 whips 1.2m long
Pressure maintenance valve
Interstage control gauges
Maxifilter filter system
Cabin internal temperature with automatic switch-off
Automatic direction of rotation control
Pressure switch with automatic shutdown
Oil level control with automatic shutdown
Automatic condensate drain with conveyor system in the tank
Frame color Blue RAL 5015

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

232 bar / 300 bar / 330 bar

Max working pressure

420 bar

Permissible ambient temperature range

-10° C ÷ +40° C

Permissible altitude

0 ÷ 1.500 m SLM

Max permissible tilt


Cabinet insonorizzato con fonoassorbente

Operating voltage, standard

400 V; 50 Hz

Other operating voltage

On three-phase electric motor at 60Hz the power (kW / Hp) increases by 20%.

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


Synthetic Coltri Oil ST 755

Oil change interval

1 year / 1,000 h


Steel thickness 1.5 mm – color Blue RAL 5015 – Powder coating – scratch-resistant


LpA 65 dB


Charging rate

Measured during 10 liters cylinder filling from 0-200 bar tolerance +/- 5% at + 20° C ambient temperature.
235 ET

235 l/min

14.1 m3/h

8.2 CFM

315 ET

315 l/min

18.9 m3/h

11.1 CFM

330 ET

330 l/min

19.8 m3/h

11.6 CFM

Purification system


Cooling air flow, min.

235 ET

1.440 m3/h

315 ET

2.180 m3/h

330 ET

2.400 m3/h


Standard model. Weight and dimensions may vary depending on accessories.
235 ET

192 kg

423 lb

315 ET

202 kg

445 lb

330 ET

202 kg

445 lb


(W x D x H)

90 x 91 x 132 cm

35.4 x 35.8 x 52 in



235 ET

4 kW

5.5 Hp

315 ET

5,5 kW

7.5 Hp

330 ET

7,5 kW

10 Hp


235 ET

Three-phase electric

315 ET

Three-phase electric

330 ET

Three-phase electric

Operating voltage/frequency

Different voltage / frequency available on request.
235 ET

400 V, 50 Hz

315 ET

400 V, 50 Hz

330 ET

400 V, 50 Hz

Rated current

235 ET

12.2 A

315 ET

13.2 A

330 ET

13.2 A

Speed (RPM)

235 ET


315 ET


330 ET


Protection class


The available models of Super Silent

(Non-standard models available upon request)

Discover Super Silent at 360 °