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SEAWATER RO ELEMENTS FOR MARINE SYSTEMS
4.0" Diameter Models
Product Specifications
| Product | Applied Pressure psig (bar) | Permeate Flow Rate gpd (m3/d) | Stabilized Salt Rejection (%) |
|---|---|---|---|
| SW40-4021-700 | 800 (55) | 800 (3.6) | 99.5 |
| SW40-4040-2000 | 800 (55) | 2000 (9.1) | 99.5 |
Figure 1
| Product | Maximum Feed Flow Rate gpm (m3/m) | Dimensions - Inches (mm) | ||
|---|---|---|---|---|
| A | ||||
| B | C | |||
| SW40-4021-700 | 16 (0.06) | 21.0 (533) | 3.9 (99) | 0.75 (19) |
| SW40-4040-2000 | 16 (0.06) | 40.0 (1,016) | 3.9 (99) | 0.75 (19) |
Operating Limits
| Membrane Type | High Rejection Polyamide Thin-Film Composite |
| Maximum Operating Temperature | 113°F (45°C) |
| Maximum Operating Pressure | 1,000 psig (69 bar) |
| Maximum Pressure Drop | 14.4 psig (1.0 bar) |
| pH Range, Continuous Operation | 3-11 |
| pH Range, Short-Term Cleansing | 1-13 |
| Maximum Feed Silt Density Index | SDI 5 |
| Free Chlorine Tolerance | <0 ppm |
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:
General Information
- 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 and kept cool above 33°F
- 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.
Notice: The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system.
Notice: No freedom from any patent owned by Osmotik or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for customer’s use and for ensuring that customer’s workplace and disposal practices are in compliance with applicable laws and other government enactments. Osmotik assumes no obligation or liability for the information in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.