An Electric Centrifugal Fire Pump.
Electric power is now utilized to special advantage for fire service where current is available, as it is always ready for instant use, highly efficient and quickly placed in operation, while not consuming any energy unless in active service. The accompanying illustration shows a three-stage underwriters' electric centrifugal tur bine pump designed to operate at a speed of 1,050 revolutions per minute. It operates four 1 ½-inch smooth nozzle fire screens and delivers 1,000 gallons of water per minute against a head of 110 pounds pressure. This centrifugal pump has an impeller 16 inches in diameter and is directly coupled to the electric motor shaft through a flexible coupling, as will be seen in the cut. This electric motor-driven fire pump is of the latest design and construction of the Worthington type. It is directly connected to a General Electric open form of motor and it is stated that the combined efficiency of the pump and motor is so high that the equipment is most desirable for replacing stationary steam pumping installation for fire protection.
Electric power is now utilized to special advantage for fire service where current is available, as it is always ready for instant use, highly efficient and quickly placed in operation, while not consuming any energy unless in active service. The accompanying illustration shows a three-stage underwriters' electric centrifugal tur bine pump designed to operate at a speed of 1,050 revolutions per minute. It operates four 1 ½-inch smooth nozzle fire screens and delivers 1,000 gallons of water per minute against a head of 110 pounds pressure. This centrifugal pump has an impeller 16 inches in diameter and is directly coupled to the electric motor shaft through a flexible coupling, as will be seen in the cut. This electric motor-driven fire pump is of the latest design and construction of the Worthington type. It is directly connected to a General Electric open form of motor and it is stated that the combined efficiency of the pump and motor is so high that the equipment is most desirable for replacing stationary steam pumping installation for fire protection.
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