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) | 
  | STANDARD MOTOR | 1/3HP-1ph-115VAC-60c-TEFC | 
  | MAX TEMPERATURE | 316SS - 200°F (93°C) PVC - 125°F (52°C) PVDF - 125°F (52°C) | 
  
 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