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air and water air lift air pipe arrangement boiler brake horsepower butment capacity cent centrifugal pumps chamber check valve close condensate condensate pump diameter discharge pipe discharge valves displacement double suction drive economizer ejector equal exhaust steam feed water feedwater heater flow foot valve friction gage gallons per minute gas temperature gives gland handled head in feet head of water heating surface hot water hydraulic impeller increase inlet installed leakage leaking liquid live steam losses lubrication manometer maximum mechanical efficiency metal motor necessary nozzle obtained operation Pitot tube plunger and ring power plants ratio Reciprocating Pumps reduced seats shaft shown in Fig single suction slip speed stage stroke stuffing box suction and discharge suction pipe suction valves Surface condensers thrust bearing tight tion total head turbine usually vacuum pump velocity head volumetric efficiency volute water horsepower wear