the casting facility, contributing to the price reduction. To further curb costs, the design team was able to trim wall thicknesses across the entire hydrant body. While the original design had many transitions between thick and thin sections, the final design offered uniform wall thicknesses throughout. “We reduced wall thicknesses to


bring the mass down and achieve better castability for reduced scrap,” Applegate said. “The redesign removed heavy sections that would have caused shrink, aided in solidification and re- duced mass by 11%.”


The only thing left to set off the hydrant revolution envisioned by Sigelakis is selling his product to mu- nicipalities—at home and abroad. “From day one when we told Sigelock we could do this, they said we can go to the moon with this,” said Mark Koziorowski, sales manager for ThyssenKrupp’s off highway group, who handles the Sigelock account. “And we are just about ready to light the fuse on this rocket.”


METAL


George Sigelakis, inventor of the Spartan hydrant and veteran New York City fire- fighter, believes the design will save lives.


44 METAL CASTING DESIGN AND PURCHASING


JULY/AUGUST 2011


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