TFC-8040-HF-400 8" High Rejection, High Flow

Summary

Product identification

• Product Line: FLUID SYSTEMS® TFC® - HF 8” ELEMENTS
• Description: High Rejection, High Flow Seawater RO Elements
• Membrane Chemistry: Proprietary TFC® polyamide
• Membrane Type: TFC®-HF membrane
• Construction: Spiral wound with fiberglass outerwrap
• Applications: Seawater desalination

Specifications (Model 8040-HF-400)

• Permeate Flow: 9,500 gpd (36.0 m³/d)
• Chloride Rejection: 99.7%
• Active Membrane Area: 400 ft² (37.2 m²)
• Spacer: 28 mil (0.7 mm)

Test Conditions: 32,800 mg/l NaCl solution (isosmotic to ASTM standard seawater) at 800 psi (5,520 kPa) applied pressure, 7% recovery, 77°F (25°C) and pH 7.5.

Operating limits

• Typical Operating Pressure: 750 - 950 psi (5,175 - 6,555 kPa)
• Maximum Operating Pressure: 1,000 psi (6,896 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 (Exposure to extended pH range recommended to be limited to 4 hours, once per month.)
• 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: Single element recovery is approximately 7%. Maximum recovery is site and application specific.

Feed water

• Maximum Continuous Free Chlorine: <0.1 mg/l
• Maximum Feed Turbidity: 1 NTU (Feedwater with turbidity greater than 0.2 NTU generally results in frequent cleanings.)
• Maximum Feed Silt Density Index (SDI) (15 minute test): 5

Mechanical / hydraulic

• Maximum Differential Pressure per 40” Long Element: 10 psi (69 kPa)
• Maximum Differential Pressure per Vessel: 60 psi (414 kPa)

Nominal Dimensions and Weight (Model 8040-HF-400)

• A: 40 inches (1,016 mm)
• B: 8 inches (203 mm)
• C: 1.125 inches (29 mm)
• Weight: 38 lbs (17 kg)
• Interconnector Part Number: 0035260
• O-ring Part Number: 0035464
• Brine Seal Part Number: 0030584

Dimensions are provided for reference only and should not be interpreted as accurate specifications.

Chemical Tolerance

• Chlorine: Exposure to free chlorine or other oxidizing agents (permanganate, ozone, bromine, iodine) is not recommended. The 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 (e.g., iron) are present or if pH and/or temperature differ. Sodium metabisulfite (without catalysts such as cobalt) is the preferred reducing agent. Chloramine tolerance is 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: Exposure to these chemicals during operation or cleaning is not recommended, as they may cause irreversible fouling.
• Lubricants: For element loading, use only approved silicone lubricant, water, or glycerin to lubricate O-rings and brine seals. Petroleum-based lubricants or vegetable-based oils may damage the element and void the warranty.

Performance Notes

• Performance specifications are nominal values.
• Individual element permeate flows may vary ±15% from the values shown.
• Minimum rejection is 99.5% at the specified test conditions.
• System performance should be predicted using KMS ROPRO® software.
• System operating data should be normalized and key performance parameters tracked using KMS NORMPRO® software.

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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