RECIPROCATING PUMPS 



599 



I 1 id. 285. lliedler Express Pump. 



efficiency of pump and motor of about 85 per cent., with a discharge 

 coefficient of '92. 



For still higher speeds, the pump is designed with suction and delivery 



FIG. 286. Oddie-Barclay High Speed Ram Pump. 



valves mechanically operated from a wrist-plate driven by an eccentric on 

 the main shaft, as shown in Fig. 285. 



Fig. 286 shows a section through an Oddie-Barclay high speed ram 



