Reliable RO Membranes — 4040 & 8040 TFC Elements for High-Performance Water Treatment

When water quality and operational uptime matter, selecting the right reverse osmosis membrane is the fastest way to improve results and reduce cost. Our Thin Film Composite (TFC) RO membrane elements — available in the industry-standard 4040 (4″×40″) and 8040 (8″×40″) sizes — are designed to deliver stable permeate flow, high salt rejection and dependable lifetime when paired with proper pre-treatment and maintenance. Whether you seek replacement elements, OEM-labeled supply, or bulk procurement, we provide proven membrane solutions and technical support.

Why Our RO Membranes Win Buyer Trust

• High Salt Rejection & Consistent Quality — Typical salt rejection ≥98–99% under standard test conditions, ensuring repeatable permeate purity for drinking water and industrial processes.

• Sizes for Any Scale — 4040 for compact, modular systems and easy parallel expansion; 8040 for centralized plants and high-throughput applications.

• Energy-Efficient Flux — Engineered to deliver strong permeate flow at moderate pressures, lowering pumping energy and operating expense.

• Compatibility & Retrofit Friendly — Offerings include DOW Filmtec-compatible and other major-brand compatible elements for plug-and-play replacement.

• OEM & Bulk Options — Private labeling, customized packaging and competitive MOQs for distributors and system integrators.

Quick Product Snapshot (For Datasheets & Tables)

• Membrane Type: Thin Film Composite (TFC) spiral-wound element

• Standard Sizes: 4″×40″ (4040), 8″×40″ (8040)

• Nominal Permeate (approx., standard conditions): 4040: 800–1,200 GPD | 8040: 3,000–4,000 GPD

• Salt Rejection: ≥98% (typical)

• Operating pH (short-term): 2–11 (observe cleaning limits)

• Max Temp: ≤45°C (recommended ≤35°C for longer life)

• Chlorine Sensitivity: Must remove free chlorine prior to membrane contact

Typical Applications

• Municipal & bottled drinking water treatment

• Commercial systems for hotels, restaurants and office towers

• Industrial process water and boiler feed water

• Brackish water desalination and SWRO pre-treatment

• Laboratory, pharmaceutical and medical device water systems

How to Choose the Right Element — Practical Guide

1. Match capacity to daily demand. For under ~4 m³/day, use 4040 modules in parallel. For multi-ton/day, prefer 8040 to reduce housings and piping complexity.

2. Check housings for retrofit. Provide existing housings or part numbers so we can confirm fit and end-plug type.

3. Provide feedwater profile. Share TDS, SDI, turbidity and temperature — these determine the variant and necessary pre-treatment.

4. Plan recovery and anti-scaling strategies. High recovery increases concentrate TDS and scaling risk — choose membranes and chemical dosing accordingly.

5. Specify labeling & packaging. For OEM orders, indicate logo, carton design and required certifications.

Operation & Maintenance Tips (Extend Membrane Life)

• Always dechlorinate feedwater using activated carbon or chemical dechlorination — TFC membranes are chlorine-sensitive.

• Install adequate sediment filtration (≤5 µm) upstream to reduce particulate fouling.

• Monitor ΔP and permeate conductivity frequently; increasing ΔP or rising conductivity indicate fouling or membrane breach.

• Use recommended cleaning protocols (acid/alkali) and keep cleaning logs to optimize intervals and restore flux.

• Avoid dry storage — transport and install membranes in wet condition or follow wetting procedures before operation.

Why Bulk Buyers Prefer Us

• Rapid production and stable lead times for large orders.

• Competitive wholesale pricing with scalable discounts by volume.

• OEM/private-label manufacturing with low to moderate MOQ options.

• Complete documentation: datasheets, QA test reports, traceable batch numbers and export paperwork to simplify customs.

• Technical pre-sales support for system design and pre-treatment recommendations.

Frequently Asked Questions (FAQ)

Q: Are your membranes compatible with major brands?
A: Yes — we supply compatible replacements (DOW Filmtec-compatible, Toray-compatible, etc.). Provide the part number for confirmation.

Q: How long will a membrane last?
A: Typical lifespan ranges from 1 to 5 years depending on feed quality, recovery rate and maintenance. Proper pre-treatment and regular chemical cleaning greatly extend service life.

Q: Do you supply samples?
A: Yes. Samples and trial quantities are available for qualified buyers—contact sales with application details.

Q: What certifications can you provide?
A: We provide product test reports and QA documentation. Third-party certifications (NSF/WRAS) can be discussed based on order size and project needs.

Call to Action — Get Your Quote & Technical Match Today

Ready to buy replacement RO membranes or specify OEM-labeled elements for your project? Send us:

• Desired model (4040 or 8040) and quantity

• Feedwater data: TDS, SDI, turbidity, temperature

• Retrofit housing model (if applicable)

• Required labeling or packing instructions

We’ll reply with recommended models, datasheets, sample availability and competitive bulk pricing.

Contact Sales: sales@yourcompany.com | Alibaba Inquiry | WhatsApp/WeChat: +86-123-456-7890

SEO Posting Checklist (1-minute)

• Put primary keywords in page title, H1 and first 100 words: RO membrane, 4040 RO membrane, 8040 RO membrane, TFC RO membrane, wholesale, OEM.

• Add a downloadable PDF datasheet with test conditions (feed TDS, pressure, temp).

• Use image alt text with keywords: e.g., “4040 RO membrane element TFC”.

• Fill platform attributes (material, size, application, certification) on Alibaba/ChinaMade to increase matching with buyer queries.

• Offer clear sample & MOQ policies to reduce friction for inquiries.