ULP (Ultra-Low Pressure) membrane elements are aromatic polyamide composite reverse osmosis (RO) components engineered to operate at significantly lower feed pressures than standard membranes. Designed for high energy efficiency, they typically require only two-thirds of the operating pressure of regular low-pressure composite membranes to achieve equivalent permeate flow and salt rejection.
ULP series reverse osmosis membrane elements are all in stan-dard sizes, suitable for different water sources with a salt contentof less than about 2000ppm, with low operating pressure and reli-able performance. The elements are made of fiberglass woundshell. Advanced membrane manufacturing technology, optimizedmembrane winding process, and strict quality control standardsensure uniform and stable product performance.
| Model | Stable desalination rate% | Minimum desalination rate% | Water flux GPD | Effective membrane area ft² (m²) |
| ULP22-8040-440 | 99 | 98.5 | 12600 | 440 (40.9) |
| ULP22-8040 | 99 | 98.5 | 12100 | 400 (37.2) |
| ULP32-8040 | 99.2 | 99 | 10500 | 400 (37.2) |
| ULP11-4040 | 98 | 97.5 | 2800 | 90 (8.4) |
| ULP21-4040 | 99 | 98.5 | 2400 | 90 (8.4) |
| ULP31-4040 | 99.2 | 99 | 2000 | 90 (8.4) |
| ULP11-4021 | 97.5 | 97 | 1000 | 36 (3.3) |
| ULP21-4021 | 98.5 | 98 | 950 | 36 (3.3) |
| ULP31-4021 | 99 | 98.5 | 850 | 36 (3.3) |
| ULP21-2540 | 98.5 | 98 | 750 | 30 (2.8) |
Test Conditions
Operation Pressure150psi ……………………………………………………………………………………………………….. (1.03MPa )
Test solution concentration)……………………………………………………………………………………………………….(NaCI)1500ppm
Test solution temperature………………………………………………………………………………………………………….25°C
Test solution pH value……………………………………………………………………………………………………………….7.0+0.5
Recovery rate of single membrane element…………………………………………………………………………………15%
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