HYDRAULIC DREDGES 



101 



TABLE No. 2 



REFERS TO SPEEDS AT WHICH VERTICAL PUMPS, STANDARD 

 PUMPS, COMPOSITION PUMPS, AND DOUBLE-SUCTION PUMPS 

 SHOULD RUN TO RAISE WATER TO DIFFERENT HEIGHTS 



* Refers to low-lift pumps. 



If pumps are run at above speeds they will deliver quantities of water stated 

 in Table No. 3. If water is to be forced through long pipes or through many 

 elbows, speed must be increased to correspond. The above pumps can all raise 

 water 100 ft., but should be made extra heavy for elevations above 60 ft., and 

 for best results high-pressure type of pumps should be used. 



