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DOW FILMTEC SW30-4021 Membrane

Quality parts at an exceptional value
Product Description

DOW FILMTEC SW30-4021 membrane elements have one of the highest flow rates available to meet the water demands of both sea-based and land-based desalinators. DOW FILMTEC SW30 elements may also be operated at lower pressure to reduce pump size, cost, and operating expenses.

Advantages

  • High flux reduces energy use or pressure required
  • Good rejection results in good quality water

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.
  • 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.
[custom-specifications]
Specifications
Product Part Number Applied Pressure psig (bar) Permeate Flow Rate gpd (m3/d) Stabilized Salt Rejection (%)
SW30-4021 80740 800 (55 800 (3.0) 99.4
[/custom-specifications]
[custom-features]
  • Improved DOW FILMTEC™ seawater reverse osmosis elements offer the highest productivity while maintaining excellent salt rejection.
  • DOW FILMTEC SW30 membrane elements have the highest flow rates available to meet the water demands of both sea-based and land-based desalinators.
  • DOW FILMTEC SW30 elements may also be operated at lower pressure to reduce pump size, cost and operating expenses.
  • Improved DOW FILMTEC seawater membrane combined with automated, precision element fabrication result in the most consistent product performance available.
Operatins Limints
  • Membrane Type Polyamide Thin-Film Composite
  • Maximum Operating Temperature 113°F (45°C)
  • Maximum Operating Pressure 1,000 psi (69 bar)
  • Maximum Pressure Drop 15 psig (1.0 bar)
  • pH Range, Continuous Operation 2 - 11
  • pH Range, Short-Term Cleaning 1 - 13
  • Maximum Feed Silt Density Index SDI 5
  • Free Chlorine Tolerance <0.1 ppm
[/custom-features]
[custom-usage]
  • Seawater desalination
  • Marine (yacht) applications
[/custom-usage]
[custom-documents] [/custom-documents]
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Reviews
(2 reviews) Write a Review
  • 5
    fast shipping

    Posted by Ahmed B. on Mar 13th 2019

    Very professional company and teriffic products.

  • 5
    The best membrane supplier

    Posted by Abd A. on Apr 11th 2018

    shipped same day...fast delivery, thanks

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