Plunger/Piston
| Identification | |
| Manufacturer | Lewa |
| Series | ecoflow Plunger |
| Model / size | LDS 50 |
| Dosing type | Plunger/Piston |
| Pump class | Category D — Plunger/piston, ultra-high-pressure positive displacement. Packing-sealed. Accuracy ±0.5%. Best for: enhanced oil recovery, high-pressure injection, calibration. Limit: 500.0 L/h, 700.0 bar. Zero internal slip. |
| Spec code | DSG-134 |
| Dosing duty | |
| Min flow | 100 L/h |
| Max flow | 500 L/h |
| Max pressure | 700 bar |
| Dosing accuracy | 0.5 % |
| Stroke frequency | 50 spm |
| Suction lift | 3 m |
| Max viscosity | 5000 cP |
| Control & drive | |
| Control type | Analog 4-20mA + Digital + Fieldbus |
| Stroke adjustment | Variable speed 0-100% |
| Power | 2800 W |
| Supply voltage | 230/400 VAC 3-phase V |
| IP rating | IP55 |
| Materials & chemical | |
| Liquid end | Hastelloy C/Plunger |
| Diaphragm | N/A (Plunger seal) |
| Valve / ball | Hastelloy C/Check valve |
| pH range | 0-14 (full range — HF, concentrated acids, caustic) |
| Chemical compatibility | Ultra high-pressure corrosive chemicals, HF, concentrated acids |
| Application | |
| Service | Chemical Processing, Semiconductor, Nuclear |
| Key features | Lewa ecoflow LDS 50 Hastelloy C, 500 L/h at 700 bar, plunger pump, PTFE packing, 5000 cPs, 3-head |
A complete, shareable page for a single pump. It plots the performance curve (head, efficiency and NPSHr against flow, with the best-efficiency point marked, or dosing flow against stroke), decodes the API 682 / ISO 21049 mechanical seal plan, and lists the full specification — duty and operating range, drive and motor, materials of construction, build and reliability, connections, weight and certifications. Pop-up panels give the type-specific preventive-maintenance schedule (daily to annual tasks with procedures) and a troubleshooting guide (symptoms, probable causes and recommended solutions).
Run a centrifugal pump near its BEP and keep dosing pumps in their recommended stroke band. Data is from the engineering reference database — confirm against the manufacturer's certified curve before procurement.
Our expertise spans multiple industries with sector-specific water treatment solutions.
Explore closely-related tools, references and guides
Send your influent analysis and our engineers assess your process and recommend a tailored treatment solution — free, confidential and no obligation.
Select the regulatory standard for your country — it sets which parameters we need for a compliance-aware process assessment.
Required parameters for the chosen standard are flagged on the sample form. You can still submit a partial set and we will advise what else to test.
Your sample is stored against your company so we can track the project. Provide a company name or email as a minimum.