They are compressors of intermediate power. They have a single housing but have a removable head, allowing maintenance of the valves and pistons of the compressor. The electric motor is not external, it is coupled inside the compressor. As it has no axle end, it also does not have a steering wheel.
By eliminating the connection belts with the external motor (open compressors), it saves 6% in energy consumption, and the working condition of the compressor improves because it is cooled by the system fluid itself.
