Variable water supplies and low flow rates could cause ram pumps such as the Papa Pump to operate at less than maximum efficiency. In these cases, fitting a Sureflow valve to the Papa Pump will solve the problem. As the level in your supply tank drops, a float arrangement will cause the Sureflow valve to close. As the water level in the supply tank rises, the float arrangement will cause the Sureflow valve to open and the pump will automatically restart. The Sureflow and Papa Pump combination is an ideal automatic water delivery system for installations where small or variable flows exist. It will enable automatic self-regulation and maintenance-free operation. This is especially relevant in arid regions.
With a Sureflow system fitted to a Papa Pump, as the level in the tank drops the float arrangement will cause the rotary float valve to operate. This allows water pressure to act on the upper side of a diaphragm in the valve whilst venting pressure on the lower side of the diaphragm, thereby closing the valve and thus preventing water flow through the pump. Conversely, as the water level in the supply tank rises, it will cause the float arrangement to reverse the pressure on the diaphragm and allow the flow valve to re-open, automatically restarting the pump. At times of low-flow in watercourses, this system can also automatically restrict the abstraction of water when it is below a minimum level in accordance with environmental considerations. This allows the system to operate fully automatically to the mutual benefit of ourselves and the environment.
Schematic showing float operation
Schematic layout of a typical complete system