Simple Solutions That Work! Issue 10

OPTIONAL UPGRADES Most basic mixers are regularly calibrated to ensure that the pump output matches a desired value. In this case, there is the possibility that a flow restriction can occur and the output of the pump would suffer as the controls are merely feeding the pump a signal to run at a specific voltage or frequency. In the case that the resin flow needs to be guaranteed for your application, this is where a Mass Flow Resin Monitoring System would come into play. This is an upgrade where a Coriolis mass- flow meter is placed between the pump and the recirculating valve and it measures the flow rate of the resin being delivered. If there are variances away from the flow rate desired, the system will automatically speed or slow the pump to compensate. In the case that the system cannot compensate for the flow deviation, an alarm will sound. The mass flow system can also be used to adjust resin input amount based on the measured sand CLOSING AND OTHERS... Palmer has what is considered our standard offering, which includes magnetically coupled gear pumps and recirculating three-way valves, but can certainly handle any type of pump system style which best fits your specific application requirements. There are many other types available based on weight flow rate, volumetric flow rate, shear sensitive materials, pneumatically pressurized systems, mechanical bellows systems, and more. temperature, allowing the mixer to automatically adjust resin flow to maintain a consistent set time for the sand. As government agencies and safety are becoming more involved in operations and installations, we are also finding that Bulk Resin Distribution Systems are becoming much more popular. These are systems that allow several mixers to be fed from a single bulk resin supply tank set. Depending on the physical layout of the mixers, small daytank sets with inlet valves and level sensors will be located near the mixer. The mixer will feed from and recirculate to these daytanks. The daytank however, will be fed by a separate pump which is located near the large bulk tanks and is refilled automatically when the daytank level reaches a low sensor. This allows the bulk resin storage to be located in a more fire-safe area and with spill containment measures in place, without having to crowd the mixer area. Contact: RICH MCNEELY rich@palmermfg.com 58