Quote Originally Posted by Josip View Post
With CO2 is not possible to use, for example: one single compressor having two stages as we can use for *****s or for ammonia.
Hi Josip,

Why not - it's just a compressor? The CO2 compressors developed by J&E Hall in the 1880s which dominated the marine market for about 30 years were two stage. "The first CO2 machine made by J&E Hall was a two-stage compressor in which the first stage of compression was effected in the orthodox way by the action of a piston in a horizontal cylinder, and the second stage completed in a vertical cylinder containing a column of glycerine....A machine of this type was installed on 16 August 1889 in a frozen meat store in Smithfield and set to work. At 2am the pipe conveying the gas from the first to the second stage compressor burst because of a mechanical fault. 'The pipe was literally blown to ribbons' said Everard Hesketh [company chairman and designer of the compressor] 'and had it not been for the sides of the water tank surrounding the compressor...my head which was only a yard away would have been the target for some of the pieces.'"

Fortunately compressors have improved since then!!

Cheers
Andy P

PS Quotation is from "Halls of Dartford 1785-1985" by Harry Miller