Peristaltic/Hose
| Identification | |
| Manufacturer | ProMinent |
| Series | Dulcoflex DF |
| Model / size | DF 4a 250 |
| Dosing type | Peristaltic/Hose |
| Pump class | Category E — Peristaltic/hose, gentle handling dosing. Tube compression mechanism. Accuracy ±2.0%. Best for: shear-sensitive fluids, food/pharma, slurries, abrasives. Limit: 250.0 L/h, 4.0 bar. Self-priming. |
| Spec code | DSG-164 |
| Dosing duty | |
| Min flow | 50 L/h |
| Max flow | 250 L/h |
| Max pressure | 4 bar |
| Dosing accuracy | 2 % |
| Stroke frequency | 50 spm |
| Suction lift | 8 m |
| Max viscosity | 10000 cP |
| Control & drive | |
| Control type | Digital + Analog 4-20mA + Manual + Profibus |
| Stroke adjustment | Variable speed 0-100% |
| Power | 183 W |
| Supply voltage | 100-230 VAC V |
| IP rating | IP65 |
| Materials & chemical | |
| Liquid end | Peristaltic tube |
| Diaphragm | N/A (Tube pump) |
| pH range | 2-12 (general purpose) |
| Chemical compatibility | Shear-sensitive fluids, sludge, polymer, viscous chemicals, slurry |
| Application | |
| Service | Wastewater Treatment, Mining |
| Key features | ProMinent Dulcoflex DF 4a 250, 250 L/h at 4 bar, very high flow peristaltic, 10000 cPs, 8m suction |
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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