146 



WATER CONDUCTORS AND ACCESSORIES 



Sluice Gates. These may be either of structural steel or cast 

 iron, the former generally being used for large intake openings. 

 With low-head developments these openings are now generally 

 divided in a number of vertical sections in order to insure a more 

 even distribution of the water to the speed ring of the turbine, 



FIG. 71. Rising-Stem Sluice Gate 

 with Floor Stand. (Ludlow Valve 

 Mfg. Co.) 



FIG. 72. Rising Stem Sluice 

 Gate. Side View of Gate 

 Shown in Fig. 71. 



and this, of course, also very considerably reduces the size of the 

 gates, one set being provided for each section. Sometimes the 

 sections are also divided horizontally, as shown in Fig. 26, in 

 order to still further reduce the size of the gates. ' At the junction 

 of the upper and lower sections there is a reinforced concrete 

 beam which serves as a support and as a seal. The two gate 



