Selection Process for Pumps: Requirement Analysis → Pump Type Confirmation → Flow/Head Calculation → Material Selection → Drive Method → Piping and Accessories → Economic Evaluation.
When selecting a pump that is capable of handling special fluids, the first priority is to understand the characteristics of the fluid to be transferred, such as viscosity, specific gravity, solid content ratio, and the maximum particle size. In addition, factors such as suction and discharge height difference, horizontal conveying distance, fluid temperature, and piping accessories must be considered. Any variation in these factors can greatly influence the pump’s actual delivery performance.
Furthermore, to ensure a longer service life for the selected pump, it is recommended to choose a pump with a rated capacity approximately 1.5 times the required delivery rate.
Performance Comparison of Various Pump Types
| Item |
Diaphragm Pump | Gear Pump | Piston Pump | Centrifugal Pump | Turbine Pump | Screw Pump | Dynamic Pump |
| Handles abrasive fluids | ⭕ | ⭕ | ⭕ | ⭕ | |||
| Handles high-viscosity fluids | ⭕ | ⭕ | ⭕ | | ⭕ | ||
| Transferring fluids up to 130°C | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
| Ideal for shear-sensitive materials | ⭕ | ||||||
| Handles abrasive and highly corrosive fluids | ⭕ | ⭕ | ⭕ | ||||
| Can be pressure pump for sludge dewatering systems | ⭕ | ||||||
| Can shut off the discharge line during operation without damage | ⭕ | ||||||
| Capable of transferring low-density powders such as smoke powder | ⭕ | ||||||
| Handles non-abrasive and highly corrosive chemicals | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
| Dry, self-priming suction | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ |
Advantages of Air-Operated Double Diaphragm Pumps
| Item |
Diaphragm Pump | Gear Pump | Piston Pump | Centrifugal Pump | Turbine Pump | Screw Pump | Dynamic Pump |
| Adjustable flow rate | ⭕ | ||||||
| Variable pressure (0~8kg/cm²) | ⭕ | ||||||
| No mechanical seals | ⭕ | ⭕ | |||||
| Explosion-proof | ⭕ | ||||||
| Completely portable | ⭕ | ||||||
| No rotating bearings | ⭕ | ||||||
| Can run dry without damage | ⭕ | ||||||
| No bypass piping required | ⭕ | ||||||
| Will not fail due to pressure or flow changes | ⭕ | ||||||
| Easy operation | ⭕ | ||||||
| No heat generation | ⭕ |
Air-Operated Double Diaphragm (AODD) Pumps are particularly suitable for:
✔ Highly corrosive liquids
✔ High solid-content suspensions
✔ Applications requiring strong self-priming performance
Tech Seed offers a full range of AODD pumps from 1/2" to 3", meeting a wide variety of flow and process requirements.
If selecting the right pump feels complicated or you are facing specific application challenges, our professional team is ready to assist you. Contact us today for a tailored solution!!
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