Method and apparatus for increasing the efficiency of a multi-stage compressor

A nozzle assembly for injecting a liquid into a process unit through a process unit outer wall, the assembly comprising:

• a) a cross fitting body having at least one of a first and a second crossing passageway therethrough each of the crossing passageways having a first and a second end;
• b) a liquid inlet into at least one end of the first crossing passageway;
• c) a receptacle passage having a first and a second end and positioned to extend through the process unit outer wall with the second end of the second crossing passageway being sealingly connected to first end of the receptacle passage;
• d) a tubular member having a first and a second end with the first end of the tubular member being closed to liquid flow from the tubular member through the first end of the tubular member, the tubular member being positioned through the second crossing passageway with the second end of the tubular member extending into the receptacle passage;
• e) a locking fitting positioned on the body at the second end of the second crossing passageway;
• f) at least one liquid inlet into the tubular member from the first crossing passageway;
• and,
• g) a nozzle positioned on the second end of the tubular member and positioned to spray the liquid from the tubular member into the process unit through a plurality of openings in the nozzle.