Metering Pumps Series 500 "dia-Pump" From Neptune Chemical Pump Company Inc

Variable Oil By-pass™ stroke adjustment allows better valve performance than variable linkage designs. The valve checks have extra time to seat even in heavy liquids since they are idle during the by-pass portion of the suction and discharge strokes.

EZE-CLEAN™ Valves–Cartridges can be removed for cleaning without disturbing the piping to the pump.

All Neptune "dia-Pumps" are adjustable from 10% through 100% of capacity by micrometer dial.

Neptune "dia-Pumps" are available in the following materials of construction:

• Cast Iron with 316SS Trim

• 316SS • PVC • Alloy 20 • Kynar

Standard "dia-Pump" Simplex Only • Simplex capacities from 1 gph (3.7 lph) to 18 gph (68 lph) • Pressures to 1100 psi (77 kg/cm2)	Economy Liquid Head Simplex Only • Simplex capacities from 1 gph (3.7 lph) to 18 gph (68 lph) • Pressures to 1100 psi (77 kg/cm2)	The Original "dia-Pump" Available Simplex or Duplex • Simplex capacities from 0.2 gph (0.75 lph) to 80 gph (302 lph) • Pressures to 3000 psi (210 kg/cm2)