A centrifugal pump comprising a housing, an annular pump chamber in the housing, a valve controlled inlet opening into the inner part of the pump chamber, means defining a main outlet opening into the outer part of the pump chamber, a rotor rotatably mounted in the housing and an auxiliary outlet in a clearance space existing between the periphery of the rotor and the outer surface of the pump chamber, Instrumentation Ball Valves said auxiliary outlet being provided by a tapered tube projecting into said clearance space in a direction opposite to the direction of rotation, in use, of the adjacent portion of the rotor, said tube having within said housing an opening which extends in a direction transverse to a tangent to the rotor whereby the kinetic head of liquid rotating in the pump chamber is recovered in said auxiliary outlet as static pressure.
A centrifugal pump comprising a housing, an annular pump chamber in the housing, a valve controlled inlet opening into the inner part of the pump chamber, a main outlet opening into the outer part of the pump chamber, Plug Valvesa rotor rotatably mounted in the housing, means defining an auxiliary outlet in a clearance space existing between the periphery of the rotor and the outer surface of the pump chamber, FORGED STEEL VALVES said auxiliary outlet opening having means projecting into the housing in a direction opposite to the direction of rotation of the rotor whereby the kinetic head of liquid rotating in the pump chamber is recovered in said auxiliary outlet as static pressure and an ejector device powered by fluid pressure in the auxiliary outlet, whereby fluid in the main outlet may be discharged through the auxiliary outlet.

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2011-12-07

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