Supplying equal water pressure and optimal flow to each blow mold or injection mold machine is extremely important for best cooling parameters and cycle times. In the standard lay-out on the picture below, the pressure drops as the water gets further away from the chiller leaving machine 1 at a reduced rate of cooling. This situation can be rectified by installing individual flow controls to each machine and/or installing booster pumps to increase water pressure at the machines further away from the chiller. However, this solution introduces mechanical-electrical components that are subject to failure and mis-adjustment.



A very elegant and inexpensive solution that provides nearly as much control is the installation of a looped return. This piping assures that the water to each machine travels the same distance to and from the chiller, thus equalizing pressure and flow.