Dercription

Improved FilmTec™ SW30-4040 Reverse Osmosis Elements offer the highest productivity while maintaining excellent salt rejection.

• FilmTec™ SW30-4040 Membrane Elements have the highest flow rates available to meet the water demands of both sea-based and land-based desalinators.

• FilmTec™ SW30-4040 Elements may also be operated at lower pressure to reduce pump size, cost and operating expenses.

• Improved FilmTec™ SW30-4040 membrane combined with automated, precision element fabrication result in the most consistent product performance available

DuPont DOW FilmTec RO Membrane SW30-4040 Product Data Sheet

Typical Properties

1. Permeate flow and salt rejection based on the following test conditions: 32,000 ppm NaCl, pressure specified above, 77°F (25°C) and the following recovery rates: SW30-4040 – 8%.

2. Permeate flows for individual elements may vary +/-20%.
3. For the purpose of improvement, specifications may be updated periodically

Dimensions

 

	Product	Maximum Feed Flow Rate gpm (m3/h)	Dimensions – Inches (mm)  1 inch = 25.4 mm
			A	B	C	D
Large commercial	SW30-4040	16 (3.6)	40.0 (1,016)	1.05 (26.7)	0.75 (19)	3.9 (99)

1. Refer to FilmTec™ Design Guidelines for multiple-element systems of midsize elements (Form No. 45-D01588-en).
2. SW30-4040 Element fits nominal 4-inch I.D. pressure vessels.

Operating and Cleaning Limits

Membrane Type	Polyamide Thin-Film Composite
Maximum Operating Temperature	113°F (45°C)
Maximum Operating Pressure	1,200 psi (83 bar)
Maximum Pressure Drop	15 psig (1.0 bar)
pH Range  Continuous Operationa  Short-Term Cleaningb	2 - 11 1 - 13
Maximum Feed Silt Density Index	SDI 5
Free Chlorine Tolerancec	<0.1 ppm

a. Maximum temperature for continuous operation above pH 10 is 95°F (35°C).

b. Refer to FilmTec™ Cleaning Guidelines (Form No. 45-D01696-en).

c. 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 DuPont Water Solutions recommends removing residual free chlorine by pretreatment prior to membrane exposure. Please refer to Dechlorinating Feedwater (Form No. 45-D01569-en) for more information.

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. 45-D01609-en) for more information.

Operation Guidelines

Avoid any abrupt pressure or cross-flow variations on the spiral elements during startup, 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:

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.

From No. 45-D01519-en, Rev. 9

Notice:
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