other connected equipment and with the design specifications of the cooling tower. Of equal importance is the overall design of the pumping installation to provide for backup pumping capacity in the event of a pump failure or for routine system maintenance. Te ability to replace a pump quickly and ease of access for maintenance also are important. In the case of the new Chassix
Chassix melt maintenance manager Shawn Murray backed the use of grooved pipe connectors on the new pumping module for ease in pump installation and replacement.
allowed us to stay within our capital budget. It also greatly shortened the downtime that would be needed to install the new system.” Although Chassix’s new cooling
system operates as an open system, Brian James, maintenance superintendent, reported the water remains cleaner because the strainers at the pumps are easy to clean. “With the old system, dirty water was a problem because there were
no strainers at the pump. What got into the sump got into the pump,” he said. “Te old system relied only on strainers downstream to catch the dirt and debris, and coils were constantly being clogged.”
Pump Selection and System Design Pumps are the heart of the foundry
cooling system and their power, flow rate and pressure must be balanced with the cooling requirements of the furnaces and
installation, water flow is provided by three 100-HP pumps, together able to move a total of 3,600 GPM. Tese are high efficiency pumps selected specifi- cally to operate with the limited power available at the installation site. Each of the three new pumps was
incorporated into an individual module with its own piping and power/control connections. Each module also included isolation valves, making it possible to replace a pump without shutting down the cooling system. Just two of the pumps are needed to supply all of the capacity required for current operations. Te third pump serves as a connected
36 | MODERN CASTING February 2014
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