The mechanical bell float ejection control is accomplished by the rise and fall of two open cast iron bells. As the level of the liquid rises above the lower bell, it is buoyed by the weight of the water displaced. As the liquid continues to rise the liquid partially submerges the upper bell trapping air beneath it. As the counter weight rises it actuates and opens the bronze pilot valve applying air pressure to the bronze piston valve opening the port to flush the sewage receiver pot.

The mechanical bell float ejection control mechanism consists of an open cast iron upper bell float and lower weights, suspended on a 3/4″ diameter stainless steel float rod. A non-adjustable, non-lubricated, non-split mechanical type seal will be provided in the ejector pot cover for sealing the hole through which the float rod passes. To assure minimum friction without leakage of air or water, the seal is a labyrinth type consisting of three neoprene rings, each having a W-type cross section and held in place by an easily removable seal retainer. A suitable linkage and lever system is provided to transmit the movement of the float rod so as to activate a pilot valve mounted on the ejector pot. Linkage pins are 3/4″ diameter stainless steel and will be provided with grease lubricated bronze bushings. The construction of the pilot valve operating linkage and lever system includes an ejector pot pressure equalizing bronze piston, designed so as to maintain a float rod operating force which is identical with or without air pressure in the pot.

The mechanical ejection control can be optionally furnished with one (1) stainless steel electrode mounted on the cover plate, which can be utilized to signal an alarm, telephone dialer, and on-off sensor to detect pot cycle, cycle time at remote station or SCADA system if desired by our potential valuable customer.