Dive compressor Ergo Diesel

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Overview Ergo Diesel is part of Coltri's Efficient Line: a portable diesel-driven high-pressure compressor engineered to produce breathing-quality air for diving, industrial and emergency applications. It combines a 3-stage aluminum monoblock pumping unit with a dedicated Maxifilter purification system and an open, service-friendly frame for remote or off-grid use.

Key features

• 3-stage high-pressure pumping unit in aluminum monoblock
• Spray lubrication with tang immersed in oil
• Suction filter: 10 µm
• Pipes, fittings and nuts in AISI 316 stainless steel
• Intermediate condensate separator after the second stage and high-pressure final separators
• Safety valves after each compression stage
• Die-cast aluminum cylinders with Nicasil liner for high heat dispersion
• Forged aluminum connecting rods and forged steel crankshaft
• Stainless steel valves for 2nd and 3rd stages; heavy-duty roller bearings
• Hardened steel third stage with five special cast-iron segments and thrust pads on 2nd/3rd stages to eliminate lateral piston forces
• Maxifilter purification system for breathing air

Engine / Drive

• Diesel-driven power transmission via belt drive to the pumping unit
• Optional Yanmar diesel engine, 6.8 kW, available on this model
• Tilting motor carrier plate ensures constant V-belt tension

Purification system — Maxifilter The Maxifilter is a combined molecular sieve and activated carbon cartridge system designed to remove moisture, oil vapors and contaminants from high-pressure breathing-air. When fitted with original cartridges it supports compliance with breathing-air quality standards (e.g. DIN EN 12021). Filter capacity (inlet 20°C @ 200 bar): 890 m³.

Frame and construction

• Open steel frame for easy maintenance and transportability
• Thermo-formed protective casing channels cooling air over cylinders and inter-stage pipes
• Frame finish: scratch-resistant powder coating, Black RAL 9005

Standard Equipment

• Two cylinder connections (selectable: DRV DIN 232 with gauge, DRV DIN 300 with gauge, or DRV INT/YOKE 232 bar)
• Two 1.2 m filling hoses included
• Pressure holding valve
• Maxifilter purification system
• Oil level control with automatic shutdown
• Frame color: Black RAL 9005

Technical specifications

• Model: Ergo Diesel
• Range: Efficient Line
• Pumping unit: 3-stage high-pressure aluminum monoblock
• Suction filter rating: 10 µm
• Purification: Maxifilter (molecular sieve + activated carbon), capacity 890 m³ (20°C @ 200 bar)
• Engine (optional): Yanmar diesel, 6.8 kW
• Materials: AISI 316 pipes/fittings/nuts; die-cast aluminum cylinders with Nicasil; forged aluminum connecting rods; forged steel crankshaft; stainless steel valves (2nd/3rd stages)
• Bearings: heavy-duty roller bearings
• Third stage: hardened steel with 5 cast-iron segments
• Safety: safety valves after each stage; pressure holding valve
• Filling equipment: two cylinder connections selectable; two 1.2 m filling hoses included
• Frame finish: powder coated steel, RAL 9005 black