What kind of dilution system is recommended?

Typically plants use either a centralized system (which serve a number of machines), or individual dilution tanks which are dedicated to one die cast machine. Centralized systems simplify the task of making dilutions and can save cost of equipment. The disadvantage is that if different die cast machines have different operating conditions, it will be difficult to change the dilution ratio or the die lube. Individual dilution tanks allow very tight control of dilution and are preferred when part quality is of very high importance.