Neptune E Series ”Dia Pump”

Series 500-E offers an economical alternate to the standard Series 500 ”dia-PUMP” or an opportunity to ”step-up” from packed plunger pumps to a true hydraulic diaphragm pump at a modest cost increment.


Capacity to 18 gph (68 lph); Pressure to 1100 psi (77 kg/cm2)

Available liquid end materials: Cast Iron, 316SS, PVC, Kynar

Variable Oil By-pass stroke adjustment allows improved valve performance over variable linkage designs.