DOW FILMTEC™ SW30HRLE–440i Element

Product Data Sheet
Page 1 of 3 ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 609-03001, Rev. 2
December 2016
DOW FILMTEC™ SW30HRLE–440i Element
High Rejection, Seawater Reverse Osmosis Element with iLEC™ Interlocking Endcaps
Description Dow Water & Process Solutions offers various premium seawater reverse osmosis (RO)
elements designed to help reduce capital and operation cost of desalination systems.
DOW FILMTEC™ Elements combine excellent membrane quality with automated precision
fabrication, taking system performance to exceptional levels.
DOW FILMTEC™ SW30HRLE–440i Elements offer sustainable lower lifecycle cost for
medium- and high-salinity feedwater by combining high rejection and low energy
performance with the highest active area and a thick feed spacer. Benefits of the
DOW FILMTEC SW30HRLE–440i element include:
 Helps systems to be designed and operated to either lower operating cost through
reduced energy consumption, or to decrease capital cost through higher productivity
at lower operating fluxes.
 High NaCl and boron rejection to help meet World Health Organization (WHO) and
other drinking water standards.
 Very high guaranteed active area of 440 ft2
(41 m2
) permits lower system cost by
maximizing productivity and facilitating accurate and predictable system design and
operating flux.
 The combination of very high active area with a thick feed spacer (28 mil) allows low
cleaning frequency and high cleaning efficiency.
 Utilization of the distinct iLEC™ Interlocking Endcaps that help reduce system
operating costs and the risk of O-ring leaks that can cause poor water quality (see
Form No. 609-00446 for information on cost-saving benefits).
 Sustainable high performance over the operating lifetime of the element, because
oxidative treatments are not used in membrane production. This is one reason
DOW FILMTEC elements are more durable and may be cleaned more effectively over
a wider pH range (1 – 13) than most other RO elements, which use oxidative
 Effective use in permeate staged seawater desalination systems without impairing the
performance of the downstream stage.
Product Type Spiral-wound element with polyamide thin-film composite membrane
Page 2 of 3 ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 609-03001, Rev. 2
December 2016
Product Specifications
Active Area Feed Spacer
Thickness (mil)
Permeate Flow Rate Stabilized Boron
Rejection (%)
Stabilized Salt
(ft Rejection (%) 2
) (m2
) (GPD) (m3
SW30HRLE–440i 440 41 28 8,000 30.2 92 99.80
1. The above values are normalized to the following conditions: 32,000 ppm NaCl, 5 ppm boron, 800 psi (5.5 MPa),
77°F (25°C), pH 8, 8% recovery.
2. Permeate flows for individual elements may vary ± 15%.
3. Minimum Salt Rejection is 99.65%.
4. Stabilized salt rejection is generally achieved within 24 – 48 hours of continuous use; depending upon feedwater
characteristics and operating conditions.
5. Product specifications may vary slightly as improvements are implemented.
6. Active area guaranteed ± 5%. Active area as stated by Dow Water & Process Solutions is not comparable to the
nominal membrane area figure often stated by some element suppliers. Measurement method described in
Form No. 609-00434.
DOW FILMTEC™ Element (in.) (mm) (in.) (mm) (in.) (mm) (in.) (mm)
SW30HRLE–440i 40.0 1,016 40.5 1,029 7.9 201 1.125 ID 29 ID
1. Refer to Dow Water & Process Solutions Design Guidelines for multiple-element applications. 1 inch = 25.4 mm
2. Element to fit nominal 8-inch (203-mm) I.D. pressure vessel.
3. Individual elements with iLEC™ Interlocking Endcaps measure 40.5 inches (1,029 mm) in length (B). The net
length (A) of the elements when connected is 40.0 inches (1,016 mm).
Operating and
Cleaning Limits
Maximum Operating Temperature a b 113°F (45°C)
Maximum Operating Pressure b 1,200 psig (83 bar)
Maximum Element Pressure Drop 15 psig (1.0 bar)
pH Range, Continuous Operation a 2 – 11
pH Range, Short-Term Cleaning (30 min.) c 1 – 13
Maximum Feed Silt Density Index (SDI) SDI 5
Free Chlorine Tolerance d < 0.1 ppm
a Maximum temperature for continuous operation above pH 10 is 95°F (35C).
bOperation at pressures up to 1,200 psig (83 bar) is allowable under certain conditions. Consult your Dow representative for advice on
applications above 1,000 psig (69 bar) and/or above 95°F (35C).
c Refer to guidelines in “Cleaning Procedures” for more information.
d Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation
damage is not covered under warranty, Dow Water & Process Solutions recommends removing residual free chlorine by pretreatment prior to
membrane exposure. Please refer to technical bulletin “Dechlorinating Feedwater” for more information.
Page 3 of 3 ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 609-03001, Rev. 2
December 2016
Before use or storage, review these additional resources for important information:
 Usage Guidelines for DOW FILMTEC™ 8” Elements
 System Operation: Initial Start-Up
 Handling, Preservation and Storage
* Permeate obtained from first hour of operation should be discarded
Regulatory Note These membranes may be subject to drinking water application restrictions in some
countries; please check the application status before use and sale.
Dow has a fundamental concern for all who make, distribute, and use its products, and for
the environment in which we live. This concern is the basis for our product stewardship
philosophy by which we assess the safety, health, and environmental information on our
products and then take appropriate steps to protect employee and public health and our
environment. The success of our product stewardship program rests with each and every
individual involved with Dow products—from the initial concept and research, to
manufacture, use, sale, disposal, and recycle of each product.
Customer Notice Dow strongly encourages its customers to review both their manufacturing processes and
their applications of Dow products from the standpoint of human health and environmental
quality to ensure that Dow products are not used in ways for which they are not intended or
tested. Dow personnel are available to answer your questions and to provide reasonable
technical support.
DOW FILMTEC™ Membranes
Contact Dow Water & Process
North America: 1-800-447-4369
Latin America: (+55) 11-5188-9222
Europe: +800-3-694-6367
Pacific: +800 7776 7776
China: +400 889-0789
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
NOTICE: No freedom from infringement of any patent owned by Dow 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. The product shown
in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made
may not have been approved for use in all countries. Dow assumes no obligation or liability for the information in this document.
References to “Dow” or the “Company” mean the Dow legal entity selling the products to Customer unless otherwise expressly
All information set forth herein is for informational purposes only. This information is general information and may differ from that
based on actual conditions. Please note that physical properties may vary depending on certain conditions and while operating
conditions stated in this document are intended to lengthen product lifespan and/or improve product performance, it will ultimately
depend on actual circumstances and is in no event a guarantee of achieving any specific results. Nothing in this document should