Griswold high-head, self-priming centrifugal pumpsH Series high-head, self-priming pumps from Griswold Pump Co. are available in 3, 5, 7 1/2, 10, 15 and 20 hp models with heads to 260 feet and flow rates to 325 gpm. Features include a closed impeller, mechanical shaft seal, stationary seal face and rotating seal face. 800/843-9222; www.griswoldpump.com.Rockwell Automation PowerFlex 523 AC drivesThe Allen-Bradley PowerFlex 520 Series of compact AC drives from Rockwell Automation are designed for easy configuration. Files can be uploaded or downloaded to the drive using a standard USB connection. The drive also can be programmed through built-in human interface modules,
