About the compressor package, we usually put one piece compressor in an individual box, the box size 28*25*25 cm; every compressor is wrapped by plastic film, then put into a box. 

Usually 4 piece compressor is in a big carton; 

If ship by sea, one pallets can contains about 100 pieces compressor, which is 25 big carton, and its size about 2CBM. 

Details procedure pictures :