Standard Underwriter’s Fire Pump
The pumping unit illustrated is a 6-inch three-stage Allis-Chalmers Standard Underwriter’s Fire Pump direct driven by a high speed gasoline engine, made by the Allis-Chalmers Manufacturing Company, Milwaukee, Wis. The pump will deliver 1,000 gallons per minute against a head of 235 feet or 1,400 gallons per minute against a head of 200 feet, requiring 112 horsepower. The engine is a six-cylinder 6×6 Van Blerck gasoline engine with dual ignition system, electric starting and governor equipment. The engine is rated 140 horsepower at 1,200 r. p. m., which is the speed the pump is designed to run. The driving connection is made by an Allis-Chalmers flexible coupling.
Pumping units of the type illustrated are quite largely used as fire pumps and as stand-by service pumps. After the pump has been primed they can be started by simply closing the switch of the electric starter when they immediately come up to speed and give the required pumping service with very good satisfaction.