SW30ULE-440i

Summary

Product identification

The DOW™ FILMTEC™ SW30ULE-440i is a seawater reverse osmosis element featuring iLEC™ Interlocking Endcaps. It is designed for low to medium salinity and temperature waters, permeate staged systems requiring stringent water quality, and high feed salinity brackish water applications. It offers a high sustainable flow rate, coupled with high rejection of NaCl and boron.

Key Features and Benefits:

• Highest seawater element flow rate in the industry, coupled with high rejection, for ultra-low energy consumption.
• Highest guaranteed active area of 440 ft² (41 m²) maximizes productivity and enables accurate system design.
• Combination of high active area and wide feed spacer (28 mil) allows low cleaning frequency and high cleaning efficiency.
• Utilizes iLEC™ interlocking endcaps to reduce system operating costs and the risk of o-ring leaks.
• Sustainable high performance over the operating lifetime, due to absence of oxidative treatments in membrane production, allowing effective cleaning over a wider pH range (1-13).
• Can be effectively used in permeate staged seawater desalination systems without impairing downstream performance.
• Automated, precision fabrication with a greater number of shorter membrane leaves reduces overall fouling and maximizes element efficiency.
• Membrane Type: Polyamide Thin-Film Composite

Operating limits

• Maximum Operating Temperature: 113°F (45°C)
• Maximum Element Pressure Drop: 13 psig (0.9 bar)
• pH Range, Continuous Operation: 2 – 11
  • Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• pH Range, Short-Term Cleaning (30 min.): 1 – 13
• Maximum Feed Silt Density Index (SDI): SDI 5
• Free Chlorine Tolerance: <0.1 ppm
• Maximum pressure drop across an entire pressure vessel (housing): 50 psi (3.4 bar)

Product Specifications

Benchmark Test Conditions: The above benchmark values are based on 32,000 ppm NaCl, 800 psi (5.5 MPa), 77°F (25°C), pH 8 and 8% recovery. Permeate flows for individual elements may vary ±15%.

Mechanical / hydraulic

Elements fit nominal 8-inch (203 mm) I.D. pressure vessel.

(Dimensions A, B, C, D correspond to a diagram showing element length, overall length, outer diameter, and permeate tube diameter respectively. Refer to the official PDF for the complete diagram.)

Operation Guidelines

• Avoid abrupt pressure or cross-flow variations during start-up, shutdown, or cleaning to prevent membrane damage.
• During start-up, gradually increase feed pressure over 30-60 seconds and achieve cross-flow velocity over 15-20 seconds.
• Discard permeate obtained from the first hour of operation.
• Keep elements moist at all times after initial wetting.
• To prevent biological growth during prolonged system shutdowns, immerse membrane elements in a preservative solution.
• Avoid static permeate-side backpressure at all times.

General Information

• The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
• Wear protective eye shields, gloves, and sleeves to avoid prolonged contact with eyes, skin, and clothing.

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original PDF datasheet. For contractual data, refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet