Pirsch Announces a New Pumper Series
A new pumper, of the centrifugal type, has been placed on the market by Peter Pirsch & Sons Company, Kenosha, Wis. It is known as Series 15 and is manufactured in sizes of 500, 600 and 750-gallon capacity.
A 750-gallon pumper of this series, recently completed a 12-hour test conducted by an engineer of the National Board of Fire Underwriters. The apparatus has a two-stage series parallel centrifugal pump.
During the six-hour capacity test, the pumper delivered on the average, 756 gallons per minute at 126 pounds pressure. The engine speed was 1,543 r.p.m., and the pump speed, 2,993 r.p.m.
The motor, in this particular job, developed 121 horsepower at 2,400 r.p.m. The standard requirements of the National Board is not more than eighty per cent of the peak motor speed at capacity.
During the three-hour 200-pound test, the average discharge was 378 gallons per minute at 206 pounds net pump pressure. The engine speed was 1,431 r.p.m., and the pump speed 2,776 r.p.m. During the three-hour 250-pound test, the average discharge was 251 gallons per minute at 258 pounds pressure. The engine speed was 1,561 r.p.m., and the pump speed, 3,028 r.p.m.