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.

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

Metering Pumps

View All

Mixers

View All

Water and Wastewater Solutions

View All

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-S Series

500-S Series Hydraulic Metering Pumps come standard in Neptune’s Simplex design, but can be converted to Neptune’s Duplex design - 500-D Series. Neptune’s Duplex design is configured to include two micrometer dials with two liquid heads.

Liquid Head Materials of Construction

316SS
C-20
PVC
PVDF

Diaphragms

PTFE

Capacity

0.80 gph (3.03 L/h) to 34 gph (128 L/h)

Max Pressure

3,000 psi (206.8 bar)

Max Temperature

316SS - 200°F (93°C)
C-20 - 200°F (93°C)
PVC - 125°F (52°C)
PVDF - 125°F (52°C)

Standard Motor

1/3HP-1ph-115VAC-60c-TEFC

Select Your Pump

Features
Options
Downloads

Features and Benefits

EZE-CLEAN™ Valves – feature cartridges that can be removed for cleaning without disturbing the piping to the pump
Ten turn micrometer dial calibrated in 1% increments, with the ability to adjust capacity from 10% to 100%
Variable Oil By-Pass™ Stroke Adjustment provides a better valve performance when compared to variable linkage designs
Bright color contrasted dial protected from corrosion by clear PVC Covering
Stroke mechanism moves only when adjustment is made, eliminating wear
Piston is powered through complete stroke length at all capacity adjustments, eliminating stress, wear and shock of lost motion designs
Totally enclosed fan-cooled motor with built-in automatic thermal overload