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Neptune Series 500 Metering Pumps

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -

Metering,Pumps,Series 500,dia-Pump,Neptune,Chemical,Pump,Company,IncVariable 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


Metering,Pumps,Series 500,dia-Pump,Neptune,Chemical,Pump,Company,IncStandard "dia-Pump" Simplex Only

• Simplex capacities from
1 gph (3.7 lph) to 18 gph (68 lph)

• Pressures to 1100 psi (77 kg/cm2)





Metering,Pumps,Series 500,dia-Pump,Neptune,Chemical,Pump,Company,IncEconomy Liquid Head Simplex Only

• Simplex capacities from
1 gph (3.7 lph) to 18 gph (68 lph)

• Pressures to 1100 psi (77 kg/cm2)





Metering,Pumps,Series 500,dia-Pump,Neptune,Chemical,Pump,Company,IncThe 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)




Series 500 Brochure
Series 500 Pump Specs Industrial
Series 500 Pump Specs Municipal


About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


Our Products

Dataloggers, sensors, pumps, recorders, hand held instruments, flow instrumentation, level controls, valves, instrumentation, containers, tanks, transmitters, data loggers, digital indicators, mixers and agitators, pressure intrumentation, analyzers and controllers for a variety of industrial applications such as water quality, pH/ORP and more.

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Water Analyzers and Controllers, Wireless Products, Corrosion Monitoring Equipment, Cooling Tower and Boiler Controllers, a wide variety of Pumps, Valves, Dataloggers and Recorders, HVAC, Instrumentation, Skids and Systems, Containers and Tanks from world leading manufacturers are products you will find on this site.

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