Neptune Products

Delivering accurate, precise and quality solutions

Neptune's technical innovations, backed by solid customer support, builds confidence in our complete portfolio of products, delivering peace of mind reliability to our end users.

View Our Products

ProTips Education Center

Single-Source Resource for Industrial Water Treatment

New educational center dedicated to providing you with resources, best practices and product information for the industrial water treatment market.

Check out our ProTips

Neptune Markets

Single-source, end-to-end solutions

Neptune delivers pump systems for use in the reliable and safe handling of chemical fluids used for water treatment applications in municipalities, general industries and agriculture.

View Our Markets

ProTips Education Center

Single-Source Resource for Industrial Water Treatment

New educational center dedicated to providing you with resources, best practices and product information for the industrial water treatment market.

Check out our ProTips

500 Series Mechanical Diaphragm Pumps

Neptune's Series 500 Hydraulic Metering Pumps are perfect for metering applications. Each pump features a variable Oil By-Pass™ stroke adjustment which will allow 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. Series 500 pumps are available in Simplex and Duplex configurations and capacities can transfer up to 94 gallons per hour.

500-A Series

  • Simplex Design
  • 0.80 gph to 18.0 gph
  • Maximum pressure 1,100 psi
  • Available liquid end materials:
    • 316SS
    • PVC
    • C20
    • Kynar

500-D Series

  • Duplex Design
  • 1.60 gph to 68.0 gph
  • Maximum pressure 3000 psi
  • Available liquid end materials:
    • 316SS
    • PVC
    • C20
    • Kynar

500-E Series

  • Simplex Design
  • Economy liquid head
  • 2.0 gph to 34.0 gph
  • Maximum pressure 1,100psi
  • Available liquid end materials:
    • 316SS
    • PVC
    • Kynar

500-S Series

  • Simplex Design
  • 0.80 gph to 34.0 gph
  • Maximum pressure 3000 psi
  • Available liquid end materials:
    • 316SS
    • PVC
    • C20
    • Kynar

500-VS Series

  • Simplex Design
  • 2.0 gph to 58 gph
  • Maximum pressure 900 psi
  • Available liquid end materials:
    • 316SS

560 Series

  • Simplex Design (Duplex available)
  • 40.0 gph 188.0 gph
  • Maximum pressure 350 psi
  • Available liquid end materials:
    • 316SS
    • PVC
    • C20
    • Kynar