Get current pricing for Pulsa, Pulsa Feeder Diaphra Used Pulsa Feeder Diaphragm Metering Pump, Model 680-s-e. Max. Flow 19.4 Gph, Max. Pressure 100 Psig, Gear Ratio 20:1. 1/2 Hp Motor, 230/460 Volts, 17 . Product Category: Process Equipment, Sub Category: Process Pumps: