Pumps lower operating expenses
Problem
Three 300 hp long-shaft pumps at the Baltic Avenue Pump Station in Atlantic City, N.J., were sized to handle expected growth from casinos. When the growth did not materialize, the pumps operated inefficiently and cavitated, damaging the impellers.
Solution
A consultant for Atlantic City Sewerage Co. recommended replacing the units with submersible pumps from Flygt (Xylem). The utility bought a 135 hp pump delivering 9,600 gpm at 36 feet total dynamic head (TDH) and two 200 hp pumps delivering 13,500 gpm at 40 feet TDH. The pumps had variable-frequency drives and were mounted in a dry-pit configuration to handle
