Premium RO Membranes for Reliable Water Treatment — 4040 & 8040 TFC Elements

When your water system depends on consistent purity and low operating cost, the right reverse osmosis (RO) membrane makes all the difference. Our Thin Film Composite (TFC) RO membrane elements—available in popular 4040 (4″×40″) and 8040 (8″×40″) sizes—are engineered for stable flux, high salt rejection, and easy retrofit compatibility. Whether you are buying replacement elements, specifying membranes for a new build, or sourcing OEM-labelled components in bulk, our membranes deliver performance and value.

Why Buyers Choose Our RO Membranes

• Consistent High Rejection: Achieve reliable permeate quality with typical salt rejection ≥98–99% under standard conditions.

• Proven Sizes for Any Scale: The 4040 is ideal for compact systems and modular skids; the 8040 supports larger centralized plants with fewer housings.

• Energy-Optimized Design: High permeate flux at moderate pressures helps lower pump energy and operating costs.

• Easy Replacement & Compatibility: Offerings include direct-fit replacement elements compatible with major brands (e.g., DOW Filmtec-compatible), simplifying retrofits.

• Bulk Supply & OEM Services: Private-label packaging, custom carton printing, and flexible MOQs for distributors and integrators.

Typical Applications

• Drinking water purification and bottled water plants

• Commercial RO systems for hotels, restaurants and offices

• Industrial process water and boiler feed water treatment

• Brackish water desalination and pre-treatment for SWRO

• Laboratory and medical water systems

Quick Technical Snapshot

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

• Sizes: 4″×40″ (4040), 8″×40″ (8040)

• Nominal Permeate (Standard Test): 4040: ~800–1,200 GPD | 8040: ~3,000–4,000 GPD (depends on feed TDS, temp, pressure)

• Salt Rejection: ≥98% (typical)

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

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

• Chlorine Sensitivity: Free chlorine must be removed prior to membrane contact

How to Select the Right Element (Practical Buyer Guide)

1. Determine daily demand: Use 4040 elements for lower-capacity or scalable designs; choose 8040 for larger centralized throughput.

2. Check existing housings: For retrofit orders, provide existing housing specs or model numbers to ensure fit.

3. Confirm feedwater profile: Share TDS, SDI, turbidity and temperature—this determines the required membrane variant and pre-treatment needs.

4. Decide on recovery target: Higher recovery increases concentrate TDS; choose membranes and anti-scaling strategies accordingly.

5. Plan pre-treatment: Cartridge filters, activated carbon, softeners or UF are often required to protect TFC membranes and extend life.

Installation & Operation Best Practices

• Dechlorinate the feed with activated carbon or chemical dechlorination to prevent irreversible TFC damage.

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

• Monitor ΔP and permeate conductivity—increasing ΔP or rising conductivity signal maintenance or cleaning needs.

• Follow manufacturer cleaning protocols with recommended cleaners and temperatures; avoid incompatible chemicals.

Competitive Advantages for Bulk Buyers

• Fast production capacity for large-volume orders and stable lead times.

• Custom labeling and packaging options for brand owners and distributors.

• Comprehensive documentation: datasheets, QA reports, traceable batch numbers and test certificates for each shipment.

• Technical support for system integration, pre-treatment selection and cleaning schedules.

FAQ — Answering Buyer Concerns

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

Q: Can your membranes be used to replace major-brand elements?
A: We offer compatible replacement elements for many mainstream brands. Provide your current membrane model and we’ll confirm compatibility.

Q: What is the normal lead time for bulk orders?
A: Lead time depends on quantity and custom requirements. Typical production lead time is provided with the quotation—please request a time estimate with your RFQ.

Q: What support do you provide after purchase?
A: We offer technical assistance for installation, commissioning, and recommended cleaning procedures.

Call to Action — Request Pricing & Technical Match

Ready to specify reliable RO membranes for your project or inventory? Send us your application details: feedwater TDS, daily capacity, desired membrane size (4040/8040), and whether you need OEM labelling. We’ll reply with recommended models, datasheets, sample availability, and competitive volume pricing.

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

Alibaba/ChinaMade Posting Tips (Quick)

• Use primary keywords early: Title + First paragraph should include “RO membrane / 4040 / 8040 / TFC / wholesale / OEM”.

• Provide a downloadable datasheet and test condition table (feed TDS, pressure, temp).

• Add product images showing element dimensions, end plugs, and packaging; include alt text with keywords.

• Fill platform attributes (material, size, application, certification) to increase match in buyer searches.

• Offer clear MOQ and sample policy in the product description to reduce friction for inquiries.