- Improved OSMOTIK® seawater reverse osmosis elements offer the highest productivity while maintaining excellent salt rejection.
- OSMOTIK® SW30 membranes elements have the highest flow rates available to meet the water demands of both sea-based and land-based desalinators.
- OSMOTIK® SW30 elements may also be operated at lower pressure to reduce pump size, cost and operating expenses.
- Improved OSMOTIK® seawater membrane combined with automated, precision element fabrication result in the most consistent product performance available.
Rate gpd (m³/d)
Flow Rage gpm
|Dimensions – Inches (mm)
||High Rejection Polyamide Thin-Film Composite
|Maximum Operating Temperature
|| 115°F (46°C)
|Maximum Operating Pressure
||1,000 psi (69 bar)
|Maximum Pressure Drop
||14.4 psig (1.0 bar)
|pH Range, Continuous Operation
|pH Range, Short-Term Cleansing
|Maximum feed Silt Density Index
|Free Chlorine Tolerance
Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved.
Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed.
Please follow instructions provided by reverse osmosis system manufacturer.
Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows:
- Feed pressure should be increased gradually over a 30-60 second time frame.
- Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
- Permeate obtained from first hour of operation should be discarded.
- Keep elements moist at all times after initial wetting.
- If operating limits and guidelines given in this bulletin are not strictly followed, the limited warranty will be null and void.
- To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
- The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
- Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).
- Avoid static permeate-side backpressure at all times.