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This course outlines, very generally, some of the major points in a fire pump installation. It points out major components of the pump installation - the pump itself, the driver, and the controller.
Pumps can be manual or automatic, but most are installed to operate automatically. The design and installation requirements are contained in NFPA 20, and the requirements for the ongoing care for the pump assembly are contained in NFPA 25.
Typically, drivers for a pump are either electric motors or diesel engines. Steam turbine drives may be used, but gasoline and liquefied petroleum drivers are not allowed. Pumps can be centrifugal or positive displacement, but the positive displacement pump is used in specific applications, such as special suppression systems, where higher pressure is desired.
Most pumps in use today are centrifugal. The most common is the horizontal split case. All fire pumps must have a positive head pressure, derived from the water supply; pumps that take suction under lift conditions are no longer allowed by NFPA 20.
© Hughes Associates,Inc. 2012