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Product Details

Brackish Water 8040 Reverse Osmosis Membrane 14000 GPD

  • 14,000 GPD Water Production Capacity
  • Extra Low Energy, High Productivity Brackish RO Membrane
  • 99.0% Stabilized Salt Rejection
  • Trouble-Free Treatment For A Wide Range Of Difficult Feed Water
  • Lowest Operating Costs For Municipal & Industrial Applications
  • Made In the USA With Advanced Technology By Filmtec

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Operating Limits

Membrane Type

Polyamide Thin-Film Composite

Maximum Operating Temperature

113°F (45°C)

Maximum Operating Pressure

600 PSIG (41 bar)

Maximum Pressure Drop

13 PSIG (0.9 bar) 

pH Range, Continuous Operation


pH Range, Short-Term Cleaning


Maximum Feed Silt Density Index


Free Chlorine Tolerance

< 0.1 pp

Important Information

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 refer to the application information literature entitled “Start-Up Sequence” (Form No. 609-02077) for more information.

Operation Guidelines

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 an operating state is recommended as follows:

  • Feed pressure should be increased gradually over a 30-60 second time frame.
  • Cross-flow velocity at the set operating point should be achieved gradually over 15-20 seconds.
  • Permeate obtained from the first hour of operation should be discarded.

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.
  • The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
  • The maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).
  • Avoid static permeate-side back pressure 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.


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