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DOW FILMTEC TW30-4021 Membrane

Quality parts at an exceptional value
Product Description

DOW FILMTEC TW30-4021 reverse osmosis (RO) elements offer high quality water for small commercial systems purifying less than one gallon per minute (0.2 m3/d) of RO water. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance.

Advantages:

  • High flux results in high yields
  • High rejection provides good water quality
  • 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.
  • 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 30 psi (2.1 bar).
  • Avoid static permeate-side backpressure at all times.
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Specifications
Product Part Number Applied Pressure psig (bar) Permeate Flow Rate gpd (m3/d) Stabilized Salt Rejection (%)
TW30-4021 80608 225 (15.5) 900 (3.41) 99.5
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[custom-features]

DOW FILMTEC™ reverse osmosis (RO) elements offer the highest quality water for small commercial systems purifying less than one gallon per minute (0.2 m3/d) of RO water.

  • DOW FILMTEC membranes are available in a variety of sizes to meet a wide range of space requirements.
  • DOW FILMTEC XLE extra low energy elements operate at the lowest pressure in the industry, resulting in lower energy costs and enabling system builders to use lower cost components.
  • In addition to the highest quality water and the lowest energy costs, DOW FILMTEC membranes also deliver savings by providing the industry’s longest lasting and most reliable performance.
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 2 - 11
  • pH Range, Short-Term Cleaning (30 min.) 1 - 13
  • Maximum Feed Silt Density Index (SDI) 5
  • Free Chlorine Tolerance <0.1 ppm
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[custom-usage]
  • Commercial Water treatment systems
  • Food service
  • Medical and research institutions
  • Hospitality industry
[/custom-usage]
[custom-documents] [/custom-documents]
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Reviews
(2 reviews) Write a Review
  • 5
    Very pleased

    Posted by Briggittee E. on Mar 13th 2019

    I will definitely be acquiring more of these in the future.

  • 5
    Excellent customer service

    Posted by Negrinho O. on Apr 11th 2018

    Very good price

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