The G04 is built with the unique ERVOR flat-twin and monobloc piston architecture: Short piston stroke and a linear speed below 1.8 m/sec. (compressors from the competition usually have piston linear speed up to 3 m/sec). Double-bearing off-centre crankshaft for optimal balance, durability and vibration-free operation. Highly efficient cooling system : specially designed turbine rotating at 1,450 RPM cooling the compressor cylinders, valve heads and cooler directly. ERVOR's unique design means that the G04 compressor is extra compact and requires little space. Both electrical and diesel engine driven versions are available.