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.

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Metering Pumps

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Mixers

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Water and Wastewater Solutions

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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.

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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.

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500-E Series

Neptune 500-E Series Hydraulic Metering Pumps offers an economical alternative to the standard 500 Series pumps or a packed plunger type pump.

Materials of Construction

316SS
PVC
PVDF

Diaphragms

PTFE

Capacity

2 gph (7.50 L/h) to 34 gph (129 L/h)

Max Pressure

1,100 psi (75.8 bar)

Max Temperature

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

Standard Motor

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

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Features and Benefits

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