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Mark III Silent

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Control is everything

Designed with control systems that enable effective monitoring of operations: interstage pressure, oil level, internal cabin temperature, and direction of rotation detector.

Quiet. Powerful. Smart.

The model Mark Ⅲ Silent is designed with control systems that enable effective monitoring of operations: interstage pressure, oil level, internal cabin temperature, and direction of rotation detector.

Equipped with two high-pressure hose connections, it is equipped with electric motors and powerful pumping units, automatic condensate drainage, and electrical panel for managing automatic compressor shutdown. Available options include remote charging panel.

Watch it closely

Simplicity comes as standard

Imagine having a compressor capable of great performance and endowed with extraordinary robustness. What would all this be without absolute simplicity in operating it? We believe that’s what innovation is for: to make it simple.

And now for all the details

3-stage high pressure pumping unit

Aluminum monoblock,
Forged steel gooseneck
Flutter lubrication
Forged aluminum connecting rods
Bench roller bearings
Connecting rod roller bearings
1st and 2nd stage cylinders made of aluminum with hard nicasil coating
Skid guide cylinders of 2nd and 3rd stage made of aluminum with hard nicasil coating
3rd stage cylinder made of treated special steel.
Stainless steel intake and exhaust valves
Stainless steel interstage cooling tubes
Separator after the 2nd and 3rd stages
Safety valves after each stage
Filter system Maxifilter
Oil level sensor

Electric motor

One of the basic parts of the compressor: the motor transfers motion to the pumping unit through the belt. On this model, the single-phase or three-phase electric motor is available from 4 to 5 ,5 kW.

Purification system Maxifilter

The purification system Maxifilter enables reliable treatment of breathing air according to DIN EN 12021 when using original filter cartridges. Placed after the compressor 2nd and 3rd stage separator and before the pressure maintenance valve to create a first fundamental barrier against moisture. Filter capacity with inlet air at 20°C and 200 bar is 890 m³.

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 individual stages and also of the final separator during compressor operation
Timer for automatic condensate drainage device.
Integrated no-load startup (automatic discharge each time the unit is turned off).
Condensate collection tank 5 liters, with silencer; capacity about 3 liters, for environmentally friendly disposal of condensate.
Interstage pressure gauges display the operating pressure for individual compression stages. This pressure information allows the tightness of the valves (inlet and outlet) of each stage to be checked and potential sources of failure to be quickly identified.

Frame

Silenced cab chassis designed and built for easy maintenance operations. Tilting motor carrier plate ensures constant V-belt tension.

Compressor operation and maintenance are facilitated by important features and tools: oil level and drain reported externally, control console equipped with inter-stage gauges, internal temperature indicator, presence and wrong phase sequence alarm, oil shortage alarm, and run stop and manual condensate drain controls.

Highest air quality is the goal of a Coltri compressor

Air purity and quality are two indispensable features of our compressors. The air you breathe from Coltri compressors complies with EN 12021:2014 standards: that’s why with them you can work, have fun, practice in absolute safety.

Purification System Maxifilter

The Maxifilter is a high-performance purification system designed for use with high-pressure compressors intended for the production of breathing air. It uses a combined molecular sieve and activated carbon filter cartridge, ensuring effective removal of moisture, oil vapors, and other contaminants.

This system ensures that the compressed air meets the standards required for underwater, industrial and emergency use, offering maximum breathing safety and reliability.

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