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DOW FILMTEC SW30HR LE-400 Membrane

Product Description

The FILMTEC SW30HRLE-400 delivers high performance over the operating lifetime without the use of oxidative post-treatments and provides high NaCl and boron rejection to help meet World Health Organization (WHO) and other drinking water standards.

Uses for SW30HRLE-400 Membrane Elements

DOW FILMTEC SW30HRLE-400 offers rejection and low total cost of water for seawater desalination. 

Advantages

  • High flux reduces energy use or pressure required;
  • good rejection results in good quality water;
  • high boron rejection;
  • Filmtec performance and quality

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 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.

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. Refer to DOW™ FILMTEC™ Reverse Osmosis and Nanofiltration Element Three-Year Prorated Limited Warranty (Form No. 609-35010).
  • 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.
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Specifications

Product Part number Active area ft2 (m2) Maximum operating pressure psig (bar) Permeate flow rate gpd (m3/d) Stabilized boron rejection % Minimum salt rejection % Stabilized saltrejection %

SW30HRLE-400

217822 400 (37) 1,200 (83) 7,500 (28) 92 99.65 99.8
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Features

  • Membrane Type Polyamide Thin-Film Composite
  • Maximum Operating Temperaturea 113°F (45°C)
  • Maximum Element Pressure Drop 15 psig (1.0 bar)
  • pH Range, Continuous Operation 2 - 11
  • pH Range, Short-Term Cleaning (30 min.) 1 - 13
  • Maximum Feed Silt Density Index (SDI) SDI 5
  • Free Chlorine Tolerance <0.1 ppm
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[custom-usage]

Ideal Applications Include:
Seawater desalination
Municipal drinking water
Industrial desalination

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[custom-documents]DOW FILMTEC SW30HR LE-400 Membrane [/custom-documents]
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