Metering Pump · Motor diaphragm
NDWS · Motor-Driven Diaphragm Metering Pump
Cast-aluminium housing and worm gear. Stroke length can be changed while the pump is running. PTFE diaphragm. Heads PVC, PVDF, PTFE or SS316. Optional electric stroke adjuster (4–20 mA), VFD motor and explosion-proof motor.
- Flow range: 8–386 L/h
- Max pressure: 16 bar
- Motor: 180 W
- Explosion-proof motor on request
No price on site — inquiry only.
Specifications
| Parameter | Value |
|---|---|
| Max flow | 386 L/h |
| Max back pressure | 16 bar |
| Materials | PVC / PVDF / PTFE / SS316 |
| Control | stroke |
| Explosion-proof | — |
| Explosion-proof motor | On request |
| Power | 180 W |
Max flow and max back pressure are the opposite ends of this series. Each model row pairs the flow with the back pressure of that size.
Suction, viscosity and temperature
Suction lift, inlet pressure, viscosity, liquid temperature and ambient temperature belong on the inquiry, together with the medium and concentration.
Model specifications
| Model | Flow (L/h) | Pressure (bar) | Stroke (mm) | Diaphragm Ø (mm) | Pump speed (SPM) | Stroke volume (ml/stroke) | Motor (W) |
|---|---|---|---|---|---|---|---|
| NDWS-8/1.6 | 8 | 16 | 2 | 48 | 118 | 1.13 | 180 |
| NDWS-12/1.6 | 12 | 16 | 2 | 48 | 177 | 1.13 | 180 |
| NDWS-18/1.6 | 18 | 16 | 2 | 60 | 118 | 2.54 | 180 |
| NDWS-24/1.6 | 24 | 16 | 2 | 60 | 177 | 2.3 | 180 |
| NDWS-33/1.0 | 33 | 10 | 4 | 90 | 118 | 4.7 | 180 |
| NDWS-68/1.0 | 68 | 10 | 6 | 90 | 118 | 9.6 | 180 |
| NDWS-120/0.7 | 120 | 7 | 4 | 105 | 177 | 11 | 180 |
| NDWS-143/0.6 | 143 | 6 | 6 | 105 | 118 | 20.1 | 180 |
| NDWS-213/0.5 | 213 | 5 | 6 | 105 | 177 | 20.1 | 180 |
| NDWS-258/0.4 | 258 | 4 | 10 | 105 | 118 | 36.4 | 180 |
| NDWS-386/0.3 | 386 | 3 | 10 | 105 | 177 | 36.4 | 180 |
Materials
Materials science →PVC
Pump head, valves, day tanks
About 0–50 °C. Softens above that.
PVDF
Preferred plastic head for oxidizers
About −20–120 °C. Caustic service much lower.
PTFE
Diaphragm face, liner, seats, tape
Process face often −20–150 °C. Limited by the backing, not the skin.
SS316
Heads, plungers, clean-water hardware
Wide mechanically. Chloride SCC risk rises with heat.
Temperature windows below describe the listed materials. Liquid temperature for the pump still depends on the head, the chemical and the pressure, and is confirmed on the quote.
Documents
Main drawings ship with the quote. CAD is not published on the site.
Recommended spares
- Quote this spare
PVDF check-valve kit
AT-VLV-PVDF · 12 months
- Quote this spare
Motor-diaphragm spare set
AT-DIA-MD · 12 months / 8,000 h
FAQ
Why are there no prices?
This is an inquiry catalog. Duty, materials and certificates change the offer. Engineering replies within one business day.
What flow and pressure does this model cover?
Series ends: up to 386 L/h and up to 16 bar. Those ends are separate. Where a model table is shown, each row pairs flow with that size's back pressure. The duty is confirmed on the quote.
Which wet-end materials are listed?
PVC / PVDF / PTFE / SS316. Confirm medium, concentration and temperature on the quote.
Which certificates do you hold?
Certificates are confirmed on the quote. They are not listed on this site. EAC is arranged per order.
How do I inquire this model?
Open Get a Quote, keep the model number, and send duty and country. Engineering replies within one business day.
