Metering Pump · Motor diaphragm
GX · Mechanical Diaphragm Metering Pump
LANGO GX mechanical diaphragm metering pump. ±2% accuracy, worm-gear drive, cast-aluminium housing, IP55 motor. Stroke adjustable while running. Optional VFD or Ex BT4 / CT4 motor.
- Flow range: 120–400 L/h
- Max pressure: 5 bar
- Motor: 0.25–0.37 kW · 150 SPM
No price on site — inquiry only.
Specifications
| Parameter | Value |
|---|---|
| Max flow | 400 L/h |
| Max back pressure | 5 bar |
| Accuracy | ±2% |
| Materials | PVC / PTFE |
| Control | stroke / VFD |
| Explosion-proof | Yes |
| Weight | 16 kg |
| Ports | union |
| Power | 0.25–0.37 kW · 380 V |
| Enclosure | IP55 |
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.
Accuracy is the figure printed for this series. Fluid, back pressure and turndown are confirmed on the quote.
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) | Pump speed (SPM) | Motor (kW) |
|---|---|---|---|---|---|
| GX120 | 120 | 5 | — | 150 | 0.25 |
| GX260 | 260 | 5 | — | 150 | 0.25 |
| GX400 | 400 | 3 | — | 150 | 0.37 |
Materials
Materials science →PVC
Pump head, valves, day tanks
About 0–50 °C. Softens above that.
PTFE
Diaphragm face, liner, seats, tape
Process face often −20–150 °C. Limited by the backing, not the skin.
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.
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 400 L/h and up to 5 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 / PTFE. 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.