Liquid Handling Pumps from Neptune Chemical Pump Co., Inc.

Series 500 "dia-Pump" -- 515-A-N4

Series 500 "dia-Pump" -- 515-A-N4 -- View Larger Image
Series 500 "dia-Pump" -- 515-A-N4-Image

Variable 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.


Product Category
Liquid Handling Pumps
Pump Type
Metering Pump
Discharge Pressure
1100.0 psi (773 m of Water)
Liquid Flow
0.050 GPM (0.19 L/min)
Discharge Size
0.500 inch (12.7 mm)
Media Temperature
200 F (93 C)
Power Source
Pump Housing Material
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