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500 Series
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.
5000/5003 Series
Neptune Models 5005-S and 5003-S Hydraulic Metering Pumps are built to deliver very low flows that are repeatable and accurate, ranging down to quarts per day. Discharge pressures are higher than mechanical metering pumps. Explosion-proof models are available for use in hazardous atmospheres. These pumps are necessary in oil/gas production, oil recovery and refineries. Typical applications include the injection of antifoam agents, corrosion inhibitors and other additives injected at very low volumes but high pressures.
6000 Series
6000 Series Hydraulic Metering Pumps are designed for low-volume, high-pressure applications. EZE-CLEAN™ Valves – feature cartridges that can be removed for cleaning without disturbing the piping to the pump. Variable Oil By-Pass™ Stroke Adjustment provides a better valve performance, piston is powered through complete stroke length at all capacity adjustments, eliminating stress, wear and shock of lost motion designs.