Coaxial driven air compressor, wheeled, equipped with pressure switch, safety valve, pressure gauge, pressure reducer, drain cock and main tap. Automatic overload cut off. Portable and wheeled air compressor with belt driven, single and double cylinders, single or 3-phase with manual overload cut off reset switch. Equipped with pressure switch, pressure gauge, pressure reducer, safety valve and drain cock. Fixed air compressors, belt driven with single and double-stage pumps, equipped with telepressure switchfor three phase compressors, pressure gauge, safety valve, drain cock, main tap and without pressure reducer. Tandem compressors are equipped with electric control unit for delayed starting of the electric motors.