



Ml . I. B-^ \\ I 



The Flexibility of A Waterworks Installation of 

 "American" Centrifugal Pumps 



H 



EJRE is a. typical design of a small water- 

 works pumping plant of "American" Cen- 

 trifugals. 



This plant consists of four small two-stage 

 pumps so piped that any one, any two, any three, 

 or the entire four pumps can be operated at the 

 same time as two-stage pumps. 



The plant is designed, however, to have the first 

 two pumps serve domestic purposes. Each of these 

 pumps has a capacity of 750 gallons per minute, or 

 they have a combined capacity of 1500 gallons per 

 minute when operating in parallel, or by manipulat- 

 ing the valves and throwing the pumps into series 

 they form a four-stage pressure pump of 750 gallons 

 per minute capacity. 



The fourth pump has a capacity of 1500 gallons 

 per minute and serves as a relay pump for the first 

 two when operating in parallel to produce a four- 

 stage pump of 1500 gallons per minute for fire 

 service. 



The third pump is designed to operate inde- 

 pendently for night service. 



This design can be used in a pumping plant of 

 any capacity provided that the first two pumps 

 have the same capacity and that the fourth pump 

 has a capacity equal to the first two when operating 

 in parallel. 



In this installation the discharge is overhead so 

 that pumps can be placed in a pit within easy suc- 

 tion distance of water supply and the discharge pipe 

 lead directly into mains. 



But the important feature is that it produces a 

 plant of greatest flexibility of quantity of delivery 

 and pressure-head so designed that pumps always 

 operate under maximum efficiency and the plant 

 would not be seriously crippled if any pump should 

 become temporarily inoperative. 



And it combines this flexibility with tha high 

 efficiencies and other economies of the "American" 

 Centrifugal. 



Bulletin 131 shows a large number of designs for 

 waterworks installations. It ought to interest you. 



The American Well Works 



General Office and Works: Aurora, 111. 

 Chicago Office: First Nat'l Bank Bldg. 





