TFC

Summary

Product identification

Fluid Systems® TFC®-SS 8” elements are high rejection, seawater reverse osmosis (RO) membrane elements.

• Membrane Chemistry: Proprietary TFC polyamide
• Membrane Type: TFC-SS membrane
• Construction: Spiral wound with fiberglass outerwrap
• Applications: Seawater desalination, high rejection RO membrane
• Options: 40” (1,016 mm) and 60” (1,524 mm) Magnum® length, standard or high area construction

Note: Individual element permeate flows may vary +/-15% from the values shown. Minimum rejection is 99.3% at specified test conditions.

Operating limits

• Typical Operating Pressure: 750–950 psi (5,175–6,555 kPa)
• Maximum Operating Pressure: 1,200 psi (8,275 kPa)
• Maximum Operating Temperature: 113°F (45°C)
• Maximum Cleaning Temperature: 113°F (45°C)
• Allowable pH (continuous operation): 4–11
• Allowable pH (short term cleaning): 2.5–11
• Permeate Pressure: Should not exceed feed-concentrate pressure by more than 5 psi (34 kPa) at any time (on-line, off-line and during transition).
• Recovery: Site and application specific. Single element recovery is approximately 7% for 40” (1,016 mm) long elements and 11% for 60” (1,524 mm) long elements.

Feed water

• Maximum Continuous Free Chlorine: <0.1 mg/l
• Maximum Feed Turbidity: 1 NTU
• Maximum Feed SDI (15 minute test): 5.0
• Chlorine Tolerance: Intentional exposure to free chlorine or other oxidizing agents is not recommended. TFC-SS membrane has a free chlorine tolerance of approximately 1,000 ppm-hours based on testing at 77°F (25°C), pH 8. This tolerance may be significantly reduced if catalyzing metals such as iron are present or if the pH and/or temperature are different. Sodium metabisulfite (without catalysts such as cobalt) is the preferred reducing agent.
• Chloramine Tolerance: Approximately 60,000 ppm-hours in the absence of free chlorine based on testing at 77°F (25°C), pH 8.
• Cationic Polymers and Surfactants: Not recommended; TFC-SS membrane may be irreversibly fouled if exposed to cationic (positively charged) polymers or surfactants.

Product water

• Chloride Rejection (nominal): 99.6%
• Minimum Rejection: 99.3%
• Test Conditions: 32,800 mg/l NaCl solution (isosmotic to ASTM standard seawater) at 800 psi (5,520 kPa) applied pressure, 7% recovery (11% recovery for Magnum elements), 77°F (25°C) and pH 7.5.

Mechanical / hydraulic

• Feed Spacer Thickness: 28/31 mil (0.7/0.8 mm)
• Maximum Differential Pressure per Element:
  • 10 psi (69 kPa) for 40” (1,016 mm) long elements
  • 15 psi (104 kPa) for 60” (1,524 mm) long elements
• Maximum Differential Pressure per Vessel: 60 psi (414 kPa)

Lubricants: For element loading, use only approved silicone lubricant, water, or glycerin to lubricate O-rings and brine seals. The use of petroleum-based lubricants or vegetable-based oils may damage the element and void the warranty.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet