Low Pressure - High‑Flow Thin‑Film Composite RO Membrane for Commercial Drinking Water Applications

The DuPont™ TapTec™ LC HF‑4040 is a large commercial-grade, spiral-wound RO element designed for high-flow drinking water systems. It combines DuPont’s 40+ years of membrane innovation with reliable salt rejection, fast performance stabilisation, and cost-effective operation—making it ideal for cafés, restaurants, offices, lodges, and large residential installations.

Key Features:

• Ultra‑High Flow Rate: Average permeate flow of 2 800 gpd (10.6 m³/day) under standard conditions

• Outstanding Salt Rejection: Minimum 98.5%, stabilised to 99.0%

• Rapid Stabilisation: Engineered for quick startup and consistent output 

• Proven Durability: High resistance to pressure fluctuations up to 600 psi (optimised below 300 psi)

• Value‑Driven Performance: Delivers exceptional long-term ROI in commercial environments

Technical Specifications:

• Membrane Type: Polyamide Thin‑Film Composite (spiral-wound)

• Model: TapTec™ LC HF‑4040

• Permeate Flow Rate: 2 800 gpd (10.6 m³/day) at 25 °C, 1 500 ppm NaCl, 15% recovery, 150 psi

• Salt Rejection: Minimum 98.5%, Stabilised at 99.0%

• Element Length (A): 1 016 mm (40″)

• Outer Diameter (C): 99 mm (3.9")

• Inner Diameter (B): 27 mm

• Dry Weight: 1.5kg

• Feed Spacer Thickness (D): 31 mil

• Maximum Operating Pressure: 41 bar (600 psi), optimally operated below 20.7 bar (300 psi)

• Maximum Feed Flow Rate: 3.6 m³/h (16 gpm)

• pH Range (Continuous): 3–10

• pH Range (Cleaning): 2–12

• Maximum Operating Temperature: 35 °C (95 °F)

• Maximum Pressure Drop (Per Element): 1.0 bar (15 psi)

• Maximum Silt Density Index (SDI): < 5

• Free Chlorine Tolerance: < 0.1 ppm (must be removed prior to membrane)

PDF Downloads

• Product Data Sheet HERE

Applications:

• Medium-to-large RO systems for drinking water

• Commercial foodservice and beverage RO systems

• Hotels, lodges, offices, and clinics

• Water vending and bottling equipment

• Industrial pre-treatment with point-of-use quality demand

Benefits:

• High flux rates reduce the number of elements required

• Consistent performance and fast stabilisation cut operating costs

• Operates reliably under fluctuating pressure conditions

• Backed by DuPont’s robust quality control and global support

Installation & Operating Guidelines:

• Pre-treat feed water to remove chlorine and protect membrane integrity 

• Slowly ramp feed pressure over 30–60 seconds during startup; gradually increase cross-flow velocity

• Mount in standard 4″ pressure vessels, up to 600 psi rating

• Maintain in the operational pH range for optimal membrane life