Neptune Series 500 Low Volume Metering Pump
Neptune Model 481-S and 501-S hydraulic diaphragm metering pumps are built to deliver very low flows, repeatable and accurate ranging down to quarts per day. Discharge pressures are higher than are possible with mechanical diaphragm pumps. Explosion-proof models are available for use in hazardous atmospheres.
These pumps are especially popular 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. These pumps are also used for neat feeding of boiler chemicals.
Features:
- High discharge pressures, to 3000 psi (210 kg/cm²). Exceeds limits of most small pumps, ideal for high pressure systems
- EZE-CLEAN™ valves – Cartridges can be removed for cleaning without disturbing piping
- Pneumatic and electric stroke-length control available. Automatic capacity control in response to standard 4-20 mA process signal*
- Explosion-proof motors available, suitable for use in hazardous atmospheres
- Low flow-rates – quarts per day. Accurate, reliable chemical feed
Low Volume Metering Pump Brochure
Series 500 Low Volume Specifications
| Model Number |
Capacity @ 100 PSI |
Materials of Construction |
Pressure @ 1/3HP |
Pressure @ 1/2HP |
Strokes Per Minute |
|||
| psi | kg/cm² | psi | kg/cm² | |||||
| 481-S-N3 | 0.2 gph 4.8 gpd |
0.75lph 17.8 lpd |
316 SS | 1500 | 105 | n/a | n/a | 18 |
| 501-S-N1 | 0.5 gph 12 gpd |
1.9 lph 44 lpd |
Cast Iron | 1500 | 105 | n/a | n/a | 18 |
| 501-S-N3 | 316 SS | 1500 | 105 | 3000 | 210 | |||
| 501-S-N4 | C-20 | 1500 | 105 | 3000 | 210 | |||
| 501-S-N5 | PVC | 150 | 10.5 | n/a | n/a | |||
Notes:
Variable speed drives may not be used with models 481 or 501 due to low stroking speed.
501 models are available in simplex or duplex. 481 model is available as simplex only.
Use with flooded suction only.