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What does “4014” mean?
In industry standards for reverse osmosis membranes, the numbers typically follow the rule where the first two digits indicate the diameter and the last two indicate the length (with units usually in inches).
- “40”: Indicates that the nominal outer diameter of the membrane element is approximately 4.0 inches (approx. 101.6 mm).
- “14”: Indicates that the nominal length of the membrane element is approximately 14 inches (approx. 355.6 mm).
Compared to the 4040 (40-inch long) or 8040 membrane elements commonly used in large-scale industrial applications, the 4014 is a short membrane element specifically designed for compact systems with space constraints or lower permeate flow requirements.
Description
- Compact design with high space efficiency
Its 14-inch length allows for easy horizontal or vertical installation within small-scale housings, significantly reducing the overall footprint of the water treatment system.
- Standardized interfaces for easy maintenance
Despite its shorter length, the membrane shares the same diameter as standard 4040 membranes and utilizes standard 4-inch housings (requiring only the selection of a housing of the appropriate length). Accessories and seals are interchangeable, making procurement and replacement highly convenient.
- Low operating pressure and significant energy savings
The 4014 membrane features a polyamide Thin-Film Composite (TFC) construction and operates at Ultra-Low Pressure (ULP). This enables the use of lower-power pumps, thereby reducing overall energy consumption and noise levels.
Performance Parameters
| Model | 4014 |
| Effective Membrane Area | 22 ft² (2.0 m²) |
| Average Permeate Flow | 500 GPD (2.1 m³/day) |
| Salt Rejection | 99% |
| Max. Inlet Flow | 14 GPM (3.2 m³/h) |
| Operating Pressure | 150 psi (1.03 MPa) |
| Max. Operating Pressure | 600 psi (4.2 MPa) |
| Max. Feed Water Temperature | 45°C |
| Max.inflow SDI15 | 5 |
| Free Chlorine Concentration | < 0.1 mg/L |
| Continuous Operating pH Range | 3–10 |
| Chemical Cleaning pH Range | 2–11 |
| Max. Pressure Drop per Membrane Element | 15 psi (0.1 MPa) |
Applications
Thanks to its unique “short-body” design, the 4014 membrane element is widely used in scenarios with strict requirements regarding equipment size, height, or portability.
- Marine and Vehicle Water Purification Systems
Seawater desalination or brackish water purification equipment for yachts, ships, and recreational vehicles (RVs).
- Small-scale Commercial Water Purifiers
Small-to-medium-sized central pure water systems designed for office buildings, schools, hospitals, and laboratories.
- Second Stage of Two-Stage Reverse Osmosis Systems
Used in advanced water treatment as a supplement to the second reverse osmosis stage, allowing for flexible adjustment of permeate output.
- Portable Emergency Relief Water Units
Mobile water purification devices for field operations or disaster relief efforts.