Improvements in and relating to priming and regulating devices for pumps of the screw, centrifugal and valveless type
219,844. Seaborne, A. B. Oct. 23, 1923. Starting, facilitating; controlling.-A priming device for centrifugal and valveless pumps keeps water flowing through the pumps and only passes air in small controlled quantities. A tank a is connected above the pump c and between the pump inlet b and suction pipe d. Within the tank is an ejector device e of the type described in Specifications 202,595 and 206,878, and a float f controlling the valve g in the pipe h communicating between the reservoir i and the suction pipe d at the point where it enters the tank a. In normal operation all liquid passes through the tank a before entering the pump. If there is a break in the supply, the float f falls and opens the valve g. Liquid enters the tank a from the reservoir i and passes through the pump with entrained air from the suction pipe d until the break in supply is remedied and the float f rises to close the valve g. The reservoir i may have an independent supply or may be supplied from the pump discharge pipe k.