For 2 nozzle, usually one pump is enough, suppose the yarn used is not too much difference to each other; otherwise, such as 3 nozzle, then two pumps are necessary. (For two pump design, pls see our attached photo).
Our design for 3 nozzle:
1. two pumps;
2. Three CHANGE VALVE, each change valve will be in charge of one nozzle;
3. Weft yarn separator to avoid weft yarn mix between nozzles.