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The 2514 reverse osmosis (RO) membrane is a specific type of industrial-grade RO membrane element. Compared to the common 4040 (4-inch diameter × 40-inch length) or 8040 large industrial membranes, the 2514 is a specialized membrane element characterized by its small size and short length.
What does “2514” mean?
The naming of reverse osmosis membranes typically follows international standard size codes.
- “25”: Indicates that the outer diameter of the membrane element is 2.5 inches (approximately 63.5 mm).
- “14”: Indicates that the length of the membrane element is 14 inches (approximately 355.6 mm).
Description
- High Desalination Rate
Industrial-grade 2514 membranes typically offer a stable desalination rate exceeding 99.0%–99.5%, effectively reducing conductivity.
- Compact Design
The short 14-inch length makes them ideal for installation in equipment cabinets with limited space or compact height and length requirements.
- Low Permeate Flow per Element
Due to the relatively small membrane surface area, the permeate flow rate for a single 2514 membrane is typically around 150 to 200 gallons per day (GPD).
Performance Parameters
| Model | 2514 |
| Effective membrane area | 8 ft² (0.7 m²) |
| Average yield | 220 GPD (0.8 m³/d) |
| Salt rejection | 99% |
| Max. inflow temperature | 8°C |
| Max. water flow | 6 GPM (1.4 m³/h) |
| Working pressure | 150 psi (1.03 MPa) |
| Max. working pressure | 600 psi (4.2 MPa) |
| Max. water temperature | 45°C |
| Max. inflow SDI15 | 5 |
| Free chlorine concentration | <0.1 mg/L |
| Continuous running water pH range | 3–10 |
| Chemical cleaning water pH range | 2–11 |
| Max. single membrane element pressure drop | 15 psi (0.1 MPa) |
Applications
Due to its unique “short and stout” dimensions, the 2514 membrane is typically not used in large-scale water treatment plants; instead, it is widely employed in small-to-medium-sized or mobile water treatment systems that have specific constraints regarding space and output capacity.
- Laboratory Ultrapure Water Systems
Serves as a core component for pretreatment or primary reverse osmosis stages.
- Commercial Water Purification Equipment
Used in small-scale pure water systems for locations such as office buildings, restaurants, and schools.
- Vehicle- and Marine-Based Desalination Units (Seawater and Brackish Water)
Its compact design makes it ideal for mobile environments with strict space limitations, such as ships and recreational vehicles (RVs).
- Integration with Construction Machinery and Industrial Equipment
Designed for integration into automated industrial equipment that requires small quantities of purified water.