Hydraulic Diaphragm
| Identification | |
| Manufacturer | Lewa |
| Series | ecoflow |
| Model / size | LDB1 Duplex |
| Dosing type | Hydraulic Diaphragm |
| Pump class | Category C — Hydraulic diaphragm, high-pressure industrial dosing. Oil-actuated PTFE composite diaphragm. Accuracy ±0.5%. Best for: critical process dosing, oil & gas, API 675 applications. Limit: 400.0 L/h, 250.0 bar. Highest reliability class. |
| Spec code | DSG-099 |
| Dosing duty | |
| Min flow | 20 L/h |
| Max flow | 400 L/h |
| Max pressure | 250 bar |
| Dosing accuracy | 0.5 % |
| Stroke frequency | 60 spm |
| Suction lift | 4 m |
| Max viscosity | 5000 cP |
| Control & drive | |
| Control type | Analog 4-20mA + Digital + Fieldbus |
| Stroke adjustment | Variable speed 0-100% |
| Power | 1650 W |
| Supply voltage | 230/400 VAC 3-phase V |
| IP rating | IP55 |
| Materials & chemical | |
| Liquid end | Duplex SS |
| Diaphragm | PTFE composite |
| Valve / ball | Duplex SS |
| pH range | 0-14 (full range — HF, concentrated acids, caustic) |
| Chemical compatibility | High-pressure injection, solvents, polymers, viscous fluids |
| Application | |
| Service | Oil & Gas, Chemical Process, Enhanced Oil Recovery |
| Key features | Lewa ecoflow LDB1 Duplex SS, 250 bar, 400 L/h, duplex stainless steel liquid end, high-pressure hydraulic diaphragm |
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.
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