There are total 3 pumps in a Markem Imaje 9450C CIJ printer. As the structure of white pigment 9450C printer is different from the 9040 printer, instead of having one piece of pressure pump and vacuum pump, a 9450C CIJ printer got one piece of pressure pump and two pieces of transfer pump in it.
9450C is a Markem Imaje continuous inkjet printer model for white pigment, while 9450 is for black ink, so when you say 9450 white ink printer, I assume that you are talking about 9450C.
Now we know there is one piece of pressure pump and two pieces of transfer pump in a MI 9450C printer, when we order pumps next time, we know exactly what we are looking for.
L&S CIJ Codification Parts 