Chemical metering pumps help eliminate vapor lock and loss of primeProblem: A military base in California’s San Diego County has a water supply and wastewater treatment plant to serve a population of 70,000. Diaphragm metering pumps had been used to inject sodium hypochlorite into the wastewater treatment system. The cycle consists of a suction and discharge phase. During the suction phase, gaseous chemicals were causing vapor lock and causing the pump to lose prime.Solution: The pumps were replaced with two ProSeries-M MD-3 double-diaphragm metering pumps (Blue-White Industries) for beta testing. In dual diaphragm configuration, when the first diaphragm is in
