We match Cycle Stop Valves to the pump size.  So if you have any info on the pump and depth to water in the well it would help.  A CSV will keep the pump running steady while filling the storage tank.  
But having said that, most well pumps that are feeding storage tanks do not need a pressure tank and pressure switch.  Normally you would just use a float switch to turn the pump on and off, and the pressure tank/pressure switch would not be needed and the pump would not cycle.