Pump system with vacuum source

摘要

A pumping system is disclosed that includes a vacuum source. The pumping system includes a motor coupled to a centrifugal pump and a separator defining a reservoir in fluid communication with an inlet of the centrifugal pump. A water liquid ring vacuum pump having an inlet is provided in fluid communication with the reservoir of the separator. Accordingly, the vacuum pump may provide the required vacuum to prime the pump. To backflush that pumping system, the pumping system may include a first valve provided between the discharge port of the vacuum pump and the reservoir of the separator. A second valve may be provided between the reservoir of the separator and the inlet of the water liquid ring vacuum pump. During normal operation, the first valve fluidly connects the discharge of the vacuum pump to the atmosphere and the second valve fluidly connects the inlet of the vacuum pump to the reservoir of the separator. During a back flush operation, the first valve fluidly connects the discharge of the vacuum pump to the reservoir of the separator and the second valve fluidly connects the inlet of the vacuum pump to the atmosphere.